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	<title>狩猟・猟銃 | へるすどあブログ</title>
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	<title>狩猟・猟銃 | へるすどあブログ</title>
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		<title>4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</title>
		<link>https://health-outdoor.com/amateur-radio-test-roundup/</link>
					<comments>https://health-outdoor.com/amateur-radio-test-roundup/#respond</comments>
		
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		<pubDate>Sun, 24 May 2026 11:28:21 +0000</pubDate>
				<category><![CDATA[アウトドア]]></category>
		<category><![CDATA[バックカントリー]]></category>
		<category><![CDATA[狩猟・猟銃]]></category>
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					<description><![CDATA[このページでは、第四級アマチュア無線技士の試験対策として、法規・無線工学の頻出問題を分野別にまとめています。法規184問、無線工学249問、合計433問を確認できます。まずは問題数の少ない項目から解くか、下の順番通りに進 [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p class="wp-block-paragraph">このページでは、第四級アマチュア無線技士の試験対策として、法規・無線工学の頻出問題を分野別にまとめています。<br><strong><span class="bold-red">法規184問、無線工学249問、合計433問を確認できます。</span></strong><span class="marker-under-red"><strong>まずは問題数の少ない項目から解くか、</strong></span><strong>下の順番通りに進めてください。</strong></p>




  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-2" checked><label class="toc-title" for="toc-checkbox-2">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">アマチュア無線のテスト対策は何をすればいい？</a></li><li><a href="#toc2" tabindex="0">アマチュア無線の合格基準</a></li><li><a href="#toc3" tabindex="0">法規関係（184問）の模擬問題はこちら</a></li><li><a href="#toc4" tabindex="0">無線工学（249問）の模擬問題はこちら</a></li><li><a href="#toc5" tabindex="0">アマチュア無線4級に関するQ&amp;A</a></li><li><a href="#toc6" tabindex="0">試験対策をもっとやるなら</a></li><li><a href="#toc7" tabindex="0">絶対おすすめのアマチュア無線機</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">アマチュア無線のテスト対策は何をすればいい？</span></h2>



<p class="wp-block-paragraph">第4級アマチュア無線技士の試験は、<span class="marker-under-red"><strong>頻出パターンを押さえることで対策しやすい試験です。</strong></span>このページでは、<span class="bold">法規・無線工学のよく出る形式を分野別にまとめています</span>ので繰り返し覚えるまで問題を解いてみましょう！</p>



<h2 class="wp-block-heading"><span id="toc2">アマチュア無線の合格基準</span></h2>



<p class="wp-block-paragraph">第4級アマチュア無線技士の試験は、<strong>法規12問・無線工学12問の合計24問です。</strong>合格には、<span class="bold-red">法規・無線工学のそれぞれで12問中8問以上の正解が必要</span>です。<strong><span class="marker-under-red">片方だけ高得点でも、もう片方が8問未満だと合格できません。</span></strong></p>



<div class="wp-block-cocoon-blocks-balloon-ex-box-1 speech-wrap sb-id-13 sbs-stn sbp-l sbis-cb cf block-box not-nested-style cocoon-block-balloon"><div class="speech-person"><figure class="speech-icon"><img decoding="async" src="https://health-outdoor.com/wp-content/uploads/2023/02/20211003_163815-e1675231383562.jpg" alt="" class="speech-icon-image"/></figure><div class="speech-name"></div></div><div class="speech-balloon">
<p class="wp-block-paragraph"><strong>テスト勉強のおすすめは、下記の<span class="bold-red">問題数が少ない項目から確実に取れるよう</span>に覚えていきましょう！</strong></p>
</div></div>



<h2 class="wp-block-heading"><span id="toc3">法規関係（184問）の模擬問題はこちら</span></h2>



<p class="has-text-align-left wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1/" data-type="post" data-id="5843">・無線局の免許（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-2/" data-type="post" data-id="5365">・無線設備（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-3/" data-type="post" data-id="5374">・無線従事者（18問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-4/" data-type="post" data-id="5378">・運用（62問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-5/" data-type="post" data-id="5383">・監督（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-6/" data-type="post" data-id="5388">・業務書類（19問）</a></p>



<h2 class="wp-block-heading"><span id="toc4">無線工学（249問）の模擬問題はこちら</span></h2>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-1/" data-type="post" data-id="5755">・基礎工学（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-2/" data-type="post" data-id="5781">・電子回路（30問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-3/" data-type="post" data-id="5833">・送信機（40問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-4/" data-type="post" data-id="5823">・受信機（39問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-5/" data-type="post" data-id="5800">・電波障害（13問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-6/" data-type="post" data-id="5804">・電源（16問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-7/" data-type="post" data-id="5808">・アンテナ（26問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-8/" data-type="post" data-id="5818">・電波伝搬（33問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-9/" data-type="post" data-id="5793">・測定法（17問）</a></p>



<div class="wp-block-cocoon-blocks-balloon-ex-box-1 speech-wrap sb-id-13 sbs-stn sbp-l sbis-cb cf block-box not-nested-style cocoon-block-balloon"><div class="speech-person"><figure class="speech-icon"><img decoding="async" src="https://health-outdoor.com/wp-content/uploads/2023/02/20211003_163815-e1675231383562.jpg" alt="" class="speech-icon-image"/></figure><div class="speech-name"></div></div><div class="speech-balloon">
<p class="wp-block-paragraph"><strong>こちらの問題集などの本で理解を深めることで、さらに合格率を高めることもできます</strong>！</p>
</div></div>



<h2 class="wp-block-heading"><span id="toc5">アマチュア無線4級に関するQ&amp;A</span></h2>



<p class="wp-block-paragraph"><strong>Q. 4級アマチュア無線は一夜漬けでも受かる？</strong><br>A. 暗記が得意なら可能性はあります。ただし、法規と無線工学の両方で12問中8問以上が必要なので、片方だけの対策では危険です。</p>



<p class="wp-block-paragraph"><strong>Q. 法規と無線工学はどちらから勉強すべき？</strong><br>A. 初心者は法規からがおすすめです。暗記で点を取りやすく、得点が安定しやすいです。</p>



<p class="wp-block-paragraph"><strong>Q. このページの問題だけで足りる？</strong><br>A. 頻出問題の確認には使えます。不安な人は市販の問題集で仕上げると安心です。</p>



<p class="wp-block-paragraph"><strong>Q. 試験はどこで受けられる？</strong><br>A. 第四級アマチュア無線技士はCBT方式で随時実施され、会場は全国の共通会場から選択できます。</p>



<h2 class="wp-block-heading"><span id="toc6">試験対策をもっとやるなら</span></h2>



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<h2 class="wp-block-heading"><span id="toc7">絶対おすすめのアマチュア無線機</span></h2>



<p class="wp-block-paragraph">これが、バックカントリーや狩猟で<span class="bold-red">絶対におすすめの無線機</span>です！<strong><span class="marker-under-red">必須機能である防水防塵！</span></strong>他の無線機と比べてもコスパが良く、<strong>グローブをつけてても押しやすい</strong>というメリットがあります。</p>



<p class="wp-block-paragraph"><strong>欲しいときに売っていない</strong>ことも多々ありますので、<span class="bold-red">少なくとも使用する1か月前あたりには用意しておく</span>ようにしましょう。</p>



<div class="wp-block-cocoon-blocks-balloon-ex-box-1 speech-wrap sb-id-12 sbs-stn sbp-l sbis-cb cf block-box not-nested-style cocoon-block-balloon"><div class="speech-person"><figure class="speech-icon"><img decoding="async" src="https://health-outdoor.com/wp-content/uploads/2022/05/img_4813.jpg" alt="" class="speech-icon-image"/></figure><div class="speech-name"></div></div><div class="speech-balloon">
<p class="wp-block-paragraph"><strong>バックカントリーの場合は、<span class="bold-red">防水スピーカーマイクセット</span>の購入をお勧めします</strong></p>
</div></div>



<div class="amazon-item-box product-item-box no-icon pis-m エレクトロニクス B09WYBHPM2 cf"><figure class="amazon-item-thumb product-item-thumb"><a rel="nofollow noopener" href="https://www.amazon.co.jp/dp/B09WYBHPM2?tag=healthoutdoor-22&#038;linkCode=ogi&#038;th=1&#038;psc=1" class="amazon-item-thumb-link product-item-thumb-link image-thumb" target="_blank" title="ICOM (アイコム） IC-S10 144/430ｍhz アマチュア無線機 ５W （充電池 充電器付属）"><img loading="lazy" decoding="async" src="https://m.media-amazon.com/images/I/31jXQuEfpvL._SL160_.jpg" alt="ICOM (アイコム） IC-S10 144/430ｍhz アマチュア無線機 ５W （充電池 充電器付属）" width="118" height="160" class="amazon-item-thumb-image product-item-thumb-image"><div class="amazon-item-thumb-l product-item-thumb-l image-content"><img loading="lazy" decoding="async" src="https://m.media-amazon.com/images/I/31jXQuEfpvL._SL500_.jpg" alt="" width="369" height="500"></div></a></figure><div class="amazon-item-content product-item-content cf"><div class="amazon-item-title product-item-title"><a rel="nofollow noopener" href="https://www.amazon.co.jp/dp/B09WYBHPM2?tag=healthoutdoor-22&#038;linkCode=ogi&#038;th=1&#038;psc=1" class="amazon-item-title-link product-item-title-link" target="_blank" title="ICOM (アイコム） IC-S10 144/430ｍhz アマチュア無線機 ５W （充電池 充電器付属）">ICOM (アイコム） IC-S10 144/430ｍhz アマチュア無線機 ５W （充電池 充電器付属）</a></div><div class="amazon-item-snippet product-item-snippet"><div class="amazon-item-maker product-item-maker">アイコム(ICOM)</div><div class="product-item-price"><span class="item-price">￥19,800</span><span class="acquired-date">（2026/05/24 22:24時点）</span></div><div class="amazon-item-review product-item-review item-review"><span class="fa fa-comments-o" aria-hidden="true"></span> <a rel="nofollow noopener" class="amazon-item-review-link product-item-review-link item-review-link" href="https://www.amazon.co.jp/product-reviews/B09WYBHPM2/?tag=healthoutdoor-22" target="_blank">Amazonの商品レビュー・口コミを見る</a></div></div><div class="amazon-item-buttons product-item-buttons"><div class="shoplinkamazon"><a rel="nofollow noopener" href="https://www.amazon.co.jp/gp/search?keywords=ICOM+%28%E3%82%A2%E3%82%A4%E3%82%B3%E3%83%A0%EF%BC%89+IC-S10+144%2F430%EF%BD%8Dhz+%E3%82%A2%E3%83%9E%E3%83%81%E3%83%A5%E3%82%A2%E7%84%A1%E7%B7%9A%E6%A9%9F+%EF%BC%95W+%EF%BC%88%E5%85%85%E9%9B%BB%E6%B1%A0+%E5%85%85%E9%9B%BB%E5%99%A8%E4%BB%98%E5%B1%9E%EF%BC%89&#038;tag=healthoutdoor-22" target="_blank">Amazon</a></div><div class="shoplinkrakuten"><a rel="nofollow noopener" href="https://hb.afl.rakuten.co.jp/hgc/0c05478b.b44fcc7c.0c05478c.3168c59d/?pc=https%3A%2F%2Fsearch.rakuten.co.jp%2Fsearch%2Fmall%2FICOM+%28%E3%82%A2%E3%82%A4%E3%82%B3%E3%83%A0%EF%BC%89+IC-S10+144%2F430%EF%BD%8Dhz+%E3%82%A2%E3%83%9E%E3%83%81%E3%83%A5%E3%82%A2%E7%84%A1%E7%B7%9A%E6%A9%9F+%EF%BC%95W+%EF%BC%88%E5%85%85%E9%9B%BB%E6%B1%A0+%E5%85%85%E9%9B%BB%E5%99%A8%E4%BB%98%E5%B1%9E%EF%BC%89%2F&#038;m=https%3A%2F%2Fsearch.rakuten.co.jp%2Fsearch%2Fmall%2FICOM+%28%E3%82%A2%E3%82%A4%E3%82%B3%E3%83%A0%EF%BC%89+IC-S10+144%2F430%EF%BD%8Dhz+%E3%82%A2%E3%83%9E%E3%83%81%E3%83%A5%E3%82%A2%E7%84%A1%E7%B7%9A%E6%A9%9F+%EF%BC%95W+%EF%BC%88%E5%85%85%E9%9B%BB%E6%B1%A0+%E5%85%85%E9%9B%BB%E5%99%A8%E4%BB%98%E5%B1%9E%EF%BC%89%2F" target="_blank">楽天</a></div><div class="shoplinkyahoo"><a rel="nofollow noopener" href="https://ck.jp.ap.valuecommerce.com/servlet/referral?sid=3663036&#038;pid=887950147&#038;vc_url=http%3A%2F%2Fsearch.shopping.yahoo.co.jp%2Fsearch%3Fp%3DICOM+%28%E3%82%A2%E3%82%A4%E3%82%B3%E3%83%A0%EF%BC%89+IC-S10+144%2F430%EF%BD%8Dhz+%E3%82%A2%E3%83%9E%E3%83%81%E3%83%A5%E3%82%A2%E7%84%A1%E7%B7%9A%E6%A9%9F+%EF%BC%95W+%EF%BC%88%E5%85%85%E9%9B%BB%E6%B1%A0+%E5%85%85%E9%9B%BB%E5%99%A8%E4%BB%98%E5%B1%9E%EF%BC%89" target="_blank">Yahoo!ショッピング<img decoding="async" src="https://ad.jp.ap.valuecommerce.com/servlet/gifbanner?sid=3663036&#038;pid=887950147" width="1" height="1" border="0"></a></div><div class="shoplinkmercari"><a rel="nofollow noopener" href="https://jp.mercari.com/search?afid=8999550818&#038;keyword=ICOM+%28%E3%82%A2%E3%82%A4%E3%82%B3%E3%83%A0%EF%BC%89+IC-S10+144%2F430%EF%BD%8Dhz+%E3%82%A2%E3%83%9E%E3%83%81%E3%83%A5%E3%82%A2%E7%84%A1%E7%B7%9A%E6%A9%9F+%EF%BC%95W+%EF%BC%88%E5%85%85%E9%9B%BB%E6%B1%A0+%E5%85%85%E9%9B%BB%E5%99%A8%E4%BB%98%E5%B1%9E%EF%BC%89" target="_blank">メルカリ</a></div></div></div></div>



<div class="amazon-item-box product-item-box no-icon pis-m エレクトロニクス B0D4TLDVGK cf"><figure class="amazon-item-thumb product-item-thumb"><a rel="nofollow noopener" href="https://www.amazon.co.jp/dp/B0D4TLDVGK?tag=healthoutdoor-22&#038;linkCode=ogi&#038;th=1&#038;psc=1" class="amazon-item-thumb-link product-item-thumb-link image-thumb" target="_blank" title="アイコム IC-S10 144/430Mhz 防水スピーカーマイクセット （充電池 充電器付属）"><img loading="lazy" decoding="async" src="https://m.media-amazon.com/images/I/41iS3emTG+L._SL160_.jpg" alt="アイコム IC-S10 144/430Mhz 防水スピーカーマイクセット （充電池 充電器付属）" width="100" height="160" class="amazon-item-thumb-image product-item-thumb-image"><div class="amazon-item-thumb-l product-item-thumb-l image-content"><img loading="lazy" decoding="async" src="https://m.media-amazon.com/images/I/41iS3emTG+L._SL500_.jpg" alt="" width="314" height="500"></div></a></figure><div class="amazon-item-content product-item-content cf"><div class="amazon-item-title product-item-title"><a rel="nofollow noopener" href="https://www.amazon.co.jp/dp/B0D4TLDVGK?tag=healthoutdoor-22&#038;linkCode=ogi&#038;th=1&#038;psc=1" class="amazon-item-title-link product-item-title-link" target="_blank" title="アイコム IC-S10 144/430Mhz 防水スピーカーマイクセット （充電池 充電器付属）">アイコム IC-S10 144/430Mhz 防水スピーカーマイクセット （充電池 充電器付属）</a></div><div class="amazon-item-snippet product-item-snippet"><div class="amazon-item-maker product-item-maker">ノーブランド品</div><div class="product-item-price"><span class="item-price">￥24,980</span><span class="acquired-date">（2026/05/24 22:25時点）</span></div><div class="amazon-item-review product-item-review item-review"><span class="fa fa-comments-o" aria-hidden="true"></span> <a rel="nofollow noopener" class="amazon-item-review-link product-item-review-link item-review-link" href="https://www.amazon.co.jp/product-reviews/B0D4TLDVGK/?tag=healthoutdoor-22" target="_blank">Amazonの商品レビュー・口コミを見る</a></div></div><div class="amazon-item-buttons product-item-buttons"><div class="shoplinkamazon"><a rel="nofollow noopener" href="https://www.amazon.co.jp/gp/search?keywords=%E3%82%A2%E3%82%A4%E3%82%B3%E3%83%A0+IC-S10+144%2F430Mhz+%E9%98%B2%E6%B0%B4%E3%82%B9%E3%83%94%E3%83%BC%E3%82%AB%E3%83%BC%E3%83%9E%E3%82%A4%E3%82%AF%E3%82%BB%E3%83%83%E3%83%88+%EF%BC%88%E5%85%85%E9%9B%BB%E6%B1%A0+%E5%85%85%E9%9B%BB%E5%99%A8%E4%BB%98%E5%B1%9E%EF%BC%89&#038;tag=healthoutdoor-22" target="_blank">Amazon</a></div><div class="shoplinkrakuten"><a rel="nofollow noopener" href="https://hb.afl.rakuten.co.jp/hgc/0c05478b.b44fcc7c.0c05478c.3168c59d/?pc=https%3A%2F%2Fsearch.rakuten.co.jp%2Fsearch%2Fmall%2F%E3%82%A2%E3%82%A4%E3%82%B3%E3%83%A0+IC-S10+144%2F430Mhz+%E9%98%B2%E6%B0%B4%E3%82%B9%E3%83%94%E3%83%BC%E3%82%AB%E3%83%BC%E3%83%9E%E3%82%A4%E3%82%AF%E3%82%BB%E3%83%83%E3%83%88+%EF%BC%88%E5%85%85%E9%9B%BB%E6%B1%A0+%E5%85%85%E9%9B%BB%E5%99%A8%E4%BB%98%E5%B1%9E%EF%BC%89%2F&#038;m=https%3A%2F%2Fsearch.rakuten.co.jp%2Fsearch%2Fmall%2F%E3%82%A2%E3%82%A4%E3%82%B3%E3%83%A0+IC-S10+144%2F430Mhz+%E9%98%B2%E6%B0%B4%E3%82%B9%E3%83%94%E3%83%BC%E3%82%AB%E3%83%BC%E3%83%9E%E3%82%A4%E3%82%AF%E3%82%BB%E3%83%83%E3%83%88+%EF%BC%88%E5%85%85%E9%9B%BB%E6%B1%A0+%E5%85%85%E9%9B%BB%E5%99%A8%E4%BB%98%E5%B1%9E%EF%BC%89%2F" target="_blank">楽天</a></div><div class="shoplinkyahoo"><a rel="nofollow noopener" href="https://ck.jp.ap.valuecommerce.com/servlet/referral?sid=3663036&#038;pid=887950147&#038;vc_url=http%3A%2F%2Fsearch.shopping.yahoo.co.jp%2Fsearch%3Fp%3D%E3%82%A2%E3%82%A4%E3%82%B3%E3%83%A0+IC-S10+144%2F430Mhz+%E9%98%B2%E6%B0%B4%E3%82%B9%E3%83%94%E3%83%BC%E3%82%AB%E3%83%BC%E3%83%9E%E3%82%A4%E3%82%AF%E3%82%BB%E3%83%83%E3%83%88+%EF%BC%88%E5%85%85%E9%9B%BB%E6%B1%A0+%E5%85%85%E9%9B%BB%E5%99%A8%E4%BB%98%E5%B1%9E%EF%BC%89" target="_blank">Yahoo!ショッピング<img decoding="async" src="https://ad.jp.ap.valuecommerce.com/servlet/gifbanner?sid=3663036&#038;pid=887950147" width="1" height="1" border="0"></a></div><div class="shoplinkmercari"><a rel="nofollow noopener" href="https://jp.mercari.com/search?afid=8999550818&#038;keyword=%E3%82%A2%E3%82%A4%E3%82%B3%E3%83%A0+IC-S10+144%2F430Mhz+%E9%98%B2%E6%B0%B4%E3%82%B9%E3%83%94%E3%83%BC%E3%82%AB%E3%83%BC%E3%83%9E%E3%82%A4%E3%82%AF%E3%82%BB%E3%83%83%E3%83%88+%EF%BC%88%E5%85%85%E9%9B%BB%E6%B1%A0+%E5%85%85%E9%9B%BB%E5%99%A8%E4%BB%98%E5%B1%9E%EF%BC%89" target="_blank">メルカリ</a></div></div></div></div>
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		<post-id xmlns="com-wordpress:feed-additions:1">5889</post-id>	</item>
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		<title>これをやれば受かる！アマチュア無線4級の模擬問題集(工学③：受信機)</title>
		<link>https://health-outdoor.com/amateur-radio-test-1-3/</link>
					<comments>https://health-outdoor.com/amateur-radio-test-1-3/#respond</comments>
		
		<dc:creator><![CDATA[health.outdoor]]></dc:creator>
		<pubDate>Sun, 24 May 2026 10:42:53 +0000</pubDate>
				<category><![CDATA[アウトドア]]></category>
		<category><![CDATA[バックカントリー]]></category>
		<category><![CDATA[狩猟・猟銃]]></category>
		<guid isPermaLink="false">https://health-outdoor.com/?p=5833</guid>

					<description><![CDATA[このページでは、第4級アマチュア無線技士の無線工学から「受信機」に関する模擬問題を39問まとめています。スーパーヘテロダイン受信機、AGC回路、スケルチ回路、クラリファイヤ、周波数弁別器など、4アマで出やすい内容を中心に [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p class="wp-block-paragraph">このページでは、第4級アマチュア無線技士の無線工学から「受信機」に関する模擬問題を39問まとめています。<br>スーパーヘテロダイン受信機、AGC回路、スケルチ回路、クラリファイヤ、周波数弁別器など、4アマで出やすい内容を中心に確認できます。<br>まずは答えを見ずに解き、間違えた問題だけ繰り返し復習してください。</p>




  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-4" checked><label class="toc-title" for="toc-checkbox-4">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">模擬問題集（無線工学：受信機）全39問</a></li><li><a href="#toc2" tabindex="0">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</a><ol><li><a href="#toc3" tabindex="0">法規関係の模擬問題はこちら</a></li><li><a href="#toc4" tabindex="0">無線工学の模擬問題はこちら</a></li></ol></li><li><a href="#toc5" tabindex="0">試験対策をもっとやるなら</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">模擬問題集（無線工学：受信機）全39問</span></h2>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問1</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図は、FM（F3E）受信器の構成の一部を示したものである。空欄の部分に入れるべき名称で正しいのは次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="468" height="177" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-58.png" alt="" class="wp-image-5834" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-58.png 468w, https://health-outdoor.com/wp-content/uploads/2026/05/image-58-300x113.png 300w" sizes="(max-width: 468px) 100vw, 468px" /></figure>



<p class="wp-block-paragraph"><br>①緩衝増幅器<br>②周波数弁別器<br>③プロダクト検波器<br>④周波数逓倍器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問2</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図は、FM（F3E）受信器の構成の一部を示したものである。空欄の部分に入れるべき名称で正しいのは次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="473" height="180" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-62.png" alt="" class="wp-image-5838" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-62.png 473w, https://health-outdoor.com/wp-content/uploads/2026/05/image-62-300x114.png 300w" sizes="(max-width: 473px) 100vw, 473px" /></figure>



<p class="wp-block-paragraph"><br>①定電圧回路<br>②スケルチ回路<br>③局部発振器<br>④ AGC回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問3</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図は、スーパーヘテロダイン受信機の構成図である。音声信号を取り出す働きをするところは次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="621" height="201" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-60.png" alt="" class="wp-image-5836" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-60.png 621w, https://health-outdoor.com/wp-content/uploads/2026/05/image-60-500x162.png 500w, https://health-outdoor.com/wp-content/uploads/2026/05/image-60-300x97.png 300w" sizes="(max-width: 621px) 100vw, 621px" /></figure>



<p class="wp-block-paragraph"><br>①検波器<br>②中間周波増幅器<br>③周波数混合器<br>④高周波増幅部</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問4</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すDSB（A3E）スーパーヘテロダイン受信機の構成には誤った部分がある。これを正すにはどうすればよいか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="621" height="201" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-60.png" alt="" class="wp-image-5836" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-60.png 621w, https://health-outdoor.com/wp-content/uploads/2026/05/image-60-500x162.png 500w, https://health-outdoor.com/wp-content/uploads/2026/05/image-60-300x97.png 300w" sizes="(max-width: 621px) 100vw, 621px" /></figure>



<p class="wp-block-paragraph"><br>① BとCを入れ替える<br>② EとFを入れ替える<br>③ AとDを入れ替える<br>④ DとFを入れ替える</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問5</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すDSB（A3E）スーパーヘテロダイン受信機の構成には誤った部分がある。これを正すにはどうすればよいか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="605" height="248" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-65.png" alt="" class="wp-image-5841" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-65.png 605w, https://health-outdoor.com/wp-content/uploads/2026/05/image-65-500x205.png 500w, https://health-outdoor.com/wp-content/uploads/2026/05/image-65-300x123.png 300w" sizes="(max-width: 605px) 100vw, 605px" /></figure>



<p class="wp-block-paragraph"><br>① BとCを入れ替える<br>② EとFを入れ替える<br>③ AとDを入れ替える<br>④ DとFを入れ替える</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問6</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すDSB（A3E）ダブルスーパーヘテロダイン受信機の構成の一部を示したものである。空欄の部分に入れるべきものは、次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="694" height="167" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-63.png" alt="" class="wp-image-5839" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-63.png 694w, https://health-outdoor.com/wp-content/uploads/2026/05/image-63-500x120.png 500w, https://health-outdoor.com/wp-content/uploads/2026/05/image-63-300x72.png 300w" sizes="(max-width: 694px) 100vw, 694px" /></figure>



<p class="wp-block-paragraph"><br>① 周波数弁別器<br>② 振幅制限<br>③ 検波器<br>④ 緩衝増幅器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問7</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB受信機（J3E）において、変調波から音声信号を得るため空欄の部分に用いるものは次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="370" height="186" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-59.png" alt="" class="wp-image-5835" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-59.png 370w, https://health-outdoor.com/wp-content/uploads/2026/05/image-59-300x151.png 300w" sizes="(max-width: 370px) 100vw, 370px" /></figure>



<p class="wp-block-paragraph"><br>①帯域フィルタ<br>②クラリファイヤ（またはRIT）<br>③検波器<br>④中間周波増幅器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問8</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB受信機（J3E）において、SSB変調波から音声信号を得るためには、図の空欄の部分に何を設ければよいか</strong></p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="398" height="180" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-61.png" alt="" class="wp-image-5837" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-61.png 398w, https://health-outdoor.com/wp-content/uploads/2026/05/image-61-300x136.png 300w" sizes="(max-width: 398px) 100vw, 398px" /></figure>



<p class="wp-block-paragraph"><br>①復調用局部発振器<br>②クラリファイヤ（またはRIT）<br>③検波器<br>④スケルチ</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問9</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>無線受信機のスピーカーから大きな雑音が出ている時、これが外来雑音によるものかどうかを確かめるにはどうすればいいか</strong></p>



<p class="wp-block-paragraph"><br>①アースを外し受信機の同調ずらす<br>②アンテナ端子とアース端子間を導線でつなぐ<br>③アンテナ端子とアース端子間を高抵抗でつなぐ<br>④アンテナを外し新しい別のアンテナと交換する</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問10</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで、正しいのはどれか</strong></p>



<p class="wp-block-paragraph">周波数弁別器は、「A」の変化から信号波を取り出す回路であり、主としてFM波の「B」に用いられる</p>



<p class="wp-block-paragraph"><br>①A:振幅　　B：復調<br>②A:振幅　　B：変調<br>③A:周波数　B：復調<br>④A:周波数　B：変調</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問11</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで、正しいのはどれか</strong></p>



<p class="wp-block-paragraph">フェージングなどにより受信電波が時間とともに変化する場合、電波が強くなった時には受信機の利得を「A」、また、電波が弱くなった時には利得を「B」て、受信機の出力を一定に保つ働きをする回路を「C」という</p>



<p class="wp-block-paragraph"><br>①A：上げ　　B：下げ　C：AGC回路<br>②A：下げ　　B：上げ　C：AFC回路<br>③A：上げ　　B：下げ　C：AFC回路<br>④A：下げ　　B：上げ　C：AGC回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問1２</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで、正しいのはどれか</strong></p>



<p class="wp-block-paragraph">周波数弁別器は、「A」の変化を「B」の変化に変換する回路であり、主としてFM波の「C」に用いられる</p>



<p class="wp-block-paragraph"><br>①A:周波数　B：振幅　　C：復調<br>②A:周波数　B：振幅　　C：変調<br>③A:振幅　　B：周波数　C：復調<br>④A:振幅　　B：周波数　C：変調</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問13</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の文の「」内に当てはまる字句の組み合わせは、下記のうちどれか</strong></p>



<p class="wp-block-paragraph">シングルスーパーヘテロダイン受信機において「A」設けると、周波数変換部で発生する雑音の影響が少なくなるため「B」が改善される</p>



<p class="wp-block-paragraph"><br>①A：高周波増幅部　　B：選択度<br>②A：高周波増幅部　　B：信号対雑音比<br>③A：周波数変換部　　B：選択度<br>④A：中間周波増幅部　B：信号対雑音比</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１4</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>スーパヘテロダイン受信機に直線検波器が用いられる理由で、誤っているのはどれか</strong></p>



<p class="wp-block-paragraph"><br>① 大きな中間周波出力電圧が検波器に加わるから<br>②入力が小さくても大きな検波出力が取り出せるから<br>③忠実度を良くすることができるから<br>④ 大きな入力に対してひずみが少ないから</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１5</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>スーパヘテロダイン受信機において、近接周波数による混信を軽減する方法で最も効果的なのは次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①局部発振器に水晶発振回路を用いる<br>②高周波増幅器の利得を下げる<br>③ AGC回路を断（OFF）にする<br>④ 中間周波増幅部に適切な特性の帯域フィルタ（BPF）を用いる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１6</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>スーパヘテロダイン受信機において、中間周波変成器（IFT）の調整が崩れ、帯域幅が広がるとどうなるか</strong></p>



<p class="wp-block-paragraph"><br>①出力の信号対雑音比がよくなる<br>②近接周波数による混信を受けやすくなる<br>③ 強い電波を受信しにくくなる<br>④ 周波数選度がよくなる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１7</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>スーパヘテロダイン受信機に高周波増幅部がついている場合の利点で、誤っているのはどれか</strong></p>



<p class="wp-block-paragraph"><br>①感度が良くなる<br>②信号対雑音比がよくなる<br>③映像周波数混信が減る<br>④局部発振器の出力が空中線から放射されやすい</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１8</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>スーパヘテロダインの受信機周波数変換部の作用は次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①音声周波数を中間周波数に変える<br>②受信周波数を音声周波数に変える<br>③ 中間周波数を音声周波数に変える<br>④ 受信周波数を中間周波数に変える</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１9</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>スーパヘテロダインの受信機の局部発振器に必要とされる条件は、次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①発振周波数が受信周波数より低いこと<br>②発振出力が変化できること<br>③スプリアス成分が少ないこと<br>④水晶発振器であること</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問20</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>スーパヘテロダインの受信機において映像混信を軽減する方法で誤っているのは次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①アンテナ回路にウェーブトラップを挿入する<br>②中間周波数を高くする<br>③中間周波増幅部の利得を下げる<br>④高周波増幅部の選択度を高くする</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問2１</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>スーパヘテロダイン受信機の特徴で誤っているのは、次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①イメージ（映像）周波数混信を受けることがある<br>②受信周波数を変えないでそのまま増幅している<br>③選択度を極めて高くすることができる<br>④受信周波数を中間周波数に変換している</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問22</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>受信機で映像周波数に対する選択度を上げるのに最も重要な役割をするものは、次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①中間周波増幅器<br>②高周波増幅器<br>③周波数混合器<br>④低周波増幅器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問23</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>受信機の中間周波増幅器では一般にどのような周波数成分が増幅されるか</strong></p>



<p class="wp-block-paragraph"><br>①入力信号周波数成分<br>②入力信号周波数と局部発振周波数の和の周波数成分<br>③局部発振周波数成分<br>④入力信号周波数と局部発振周波数の差の周波数成分</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問24</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>受信機のSメーターが指示するものは次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①電源の一次電圧<br>②電源の出力電圧<br>③局部発振器の出力電波<br>④検波電流</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問25</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>受信機で近接周波数に対する選択度を上げるのに、最も重要な役割をするものは、次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①低周波増幅器<br>②中間周波増幅器<br>③高周波増幅器<br>④周波数混合器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問26</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>受信機にAGC回路を設ける理由は次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①選択度を良くする<br>②映像周波数混信を少なくする<br>③フェージングの影響を少なくする<br>④増幅を大きくする</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問27</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB（J3E）受信機において受信周波数がずれてスピーカーから聞こえる音声がひずんできた場合は、どのようにすればいいか</strong></p>



<p class="wp-block-paragraph"><br>①音量調整器を回して音量を大きくする<br>②クラリファイヤ（またはRIT）を調整し直す<br>③ AGC回路を断（OFF）にする<br>④帯域フィルタの通過帯域幅を狭くする</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問28</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB（J3E）受信機においてクラリファイヤ（またはRIT）を設ける目的はどれか</strong></p>



<p class="wp-block-paragraph"><br>①受信雑音を軽減する<br>②受信信号の明瞭度を良くする<br>③ 受信強度の変動を防止する<br>④受信周波数目盛を構成する</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問29</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB（J3E）受信機において、受信信号の明瞭度を良くするために調整するのは次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①音量調整<br>②クラリファイヤ（またはRIT）<br>③ AGC<br>④IDC</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問30</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB（J3E）受信機で、構成上不要なものはどれか</strong></p>



<p class="wp-block-paragraph"><br>①スピーチクリッパ<br>②クラリファイヤ（またはRIT）<br>③AGC<br>④局部発振器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問3１</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB（J3E）電波の周波数成分を表した図はどれか。ただし点線は搬送波成分がないことを示す</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="368" height="330" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-64.png" alt="" class="wp-image-5840" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-64.png 368w, https://health-outdoor.com/wp-content/uploads/2026/05/image-64-300x269.png 300w" sizes="(max-width: 368px) 100vw, 368px" /></figure>



<p class="wp-block-paragraph"><br>①１<br>②２<br>③３<br>④４</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問32</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>受信入力が変動すると出力が不安定となる。この出力を一定に保つための働きをする回路はどれか</strong></p>



<p class="wp-block-paragraph"><br>①クラリファイア回路（RIT回路）<br>②IDC回路<br>③AGC回路<br>④スケルチ回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問33</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>受信電波の強さが変動しても受信出力を一定にする働きをするものは何と呼ばれるか</strong></p>



<p class="wp-block-paragraph"><br>①BFO<br>②IDC<br>③AGC<br>④AFC</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問34</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述はF3（F3E）受信機の周波数弁別器の働きについて述べたものである。正しいのはどれか</strong><br><br>①受信電波がなくなったときに生じる大きな雑音を消す<br>②受信電波の周波数の変化から信号波を取り出す<br>③受信電波の振幅を一定にして振幅変調成分を取り除く<br>④近接周波数による混信を除去する</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問35</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述はＦＭ（F3E）受信機のどの回路について述べたものか</strong></p>



<p class="wp-block-paragraph">この回路は受信電波がない時に復調出力に現れる雑音電圧を利用して、低周波増幅回路の動作を止めて、耳障りな雑音がスピーカーから出るのを防ぐものである</p>



<p class="wp-block-paragraph"><br>①周波数弁別回路<br>②スケルチ回路<br>③振幅制限回路<br>④AFC回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問36</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述はＦＭ（F3E）受信機のスケルチ回路について述べたものである。正しいものはどれか</strong></p>



<p class="wp-block-paragraph"><br>①受信電波の近接周波数による混信を除去する回路<br>②受信電波がないときにでる、大きな雑音を消す回路<br>③受信電波の周波数成分を振幅の変化に直し、信号を取り出す回路<br>④受信電波の振幅を一定にして、振幅変調成分を取り除く回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問37</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>ＦＭ（F3E）受信機の振幅制限器の働きについて述べているのは次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①受信電波の振幅を一定にして、振幅変調成分を取り除く<br>②受信電波の周波数の変化を振幅の変化に直し、信号を取り出す<br>③選択度を良くし、近接周波数による混信を除去する<br>④受信電波がなくなったときに生じる大きな雑音を消す</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問38</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>ＦＭ（F3E）受信機において復調器として用いられるのは次のうちどれか</strong></p>



<p class="wp-block-paragraph"><br>①二乗検波器<br>②周波数弁別器<br>③ヘテロダイン検波器<br>④プロダクト検波器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問39</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>クラリファイヤ（またはRIT）の動作で正しいのはどれか</strong></p>



<p class="wp-block-paragraph"><br>①高周波増幅器の同調周波数を変化させる<br>②低周波増幅器の出力を変化させる<br>③局部発振器の発振周波数を変化させる<br>④検波器の出力を変化させる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<h2 class="wp-block-heading"><span id="toc2">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</span></h2>



<h3 class="wp-block-heading"><span id="toc3">法規関係の模擬問題はこちら</span></h3>



<p class="has-text-align-left wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1/" data-type="post" data-id="5843">・無線局の免許（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-2/" data-type="post" data-id="5365">・無線設備（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-3/" data-type="post" data-id="5374">・無線従事者（18問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-4/" data-type="post" data-id="5378">・運用（62問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-5/" data-type="post" data-id="5383">・監督（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-6/" data-type="post" data-id="5388">・業務書類（19問）</a></p>



<h3 class="wp-block-heading"><span id="toc4">無線工学の模擬問題はこちら</span></h3>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-1/" data-type="post" data-id="5755">・基礎工学（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-2/" data-type="post" data-id="5781">・電子回路（30問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-3/" data-type="post" data-id="5833">・送信機（40問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-4/" data-type="post" data-id="5823">・受信機（39問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-5/" data-type="post" data-id="5800">・電波障害（13問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-6/" data-type="post" data-id="5804">・電源（16問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-7/" data-type="post" data-id="5808">・アンテナ（26問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-8/" data-type="post" data-id="5818">・電波伝搬（33問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-9/" data-type="post" data-id="5793">・測定法（17問）</a></p>



<h2 class="wp-block-heading"><span id="toc5">試験対策をもっとやるなら</span></h2>



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		<title>これをやれば受かる！アマチュア無線4級の模擬問題集(工学⑦：アンテナ)</title>
		<link>https://health-outdoor.com/amateur-radio-test-1-7/</link>
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		<dc:creator><![CDATA[health.outdoor]]></dc:creator>
		<pubDate>Sun, 24 May 2026 10:42:46 +0000</pubDate>
				<category><![CDATA[アウトドア]]></category>
		<category><![CDATA[バックカントリー]]></category>
		<category><![CDATA[狩猟・猟銃]]></category>
		<guid isPermaLink="false">https://health-outdoor.com/?p=5808</guid>

					<description><![CDATA[このページでは、第4級アマチュア無線技士の無線工学から「アンテナ」に関する模擬問題を26問まとめています。八木アンテナ、半波長ダイポールアンテナ、ブラウンアンテナ、給電線、波長と周波数の計算など、4アマで出やすい内容を確 [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p class="wp-block-paragraph">このページでは、第4級アマチュア無線技士の無線工学から「アンテナ」に関する模擬問題を26問まとめています。<br>八木アンテナ、半波長ダイポールアンテナ、ブラウンアンテナ、給電線、波長と周波数の計算など、4アマで出やすい内容を確認できます。<br>まずは答えを見ずに解き、間違えた問題だけ繰り返し復習してください。</p>




  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-6" checked><label class="toc-title" for="toc-checkbox-6">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">模擬問題集（無線工学：アンテナ）全26問</a></li><li><a href="#toc2" tabindex="0">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</a><ol><li><a href="#toc3" tabindex="0">法規関係の模擬問題はこちら</a></li><li><a href="#toc4" tabindex="0">無線工学の模擬問題はこちら</a></li></ol></li><li><a href="#toc5" tabindex="0">試験対策をもっとやるなら</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">模擬問題集（無線工学：アンテナ）全26問</span></h2>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>アンテナから電波を放射するのに役立っていると考えられる抵抗は次のうちどれか</strong><br><br>①導体抵抗<br>②接地抵抗<br>③放射抵抗<br>④漏れ抵抗</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問２</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>通常、水平面内の指向性が図のようになるアンテナは次のうちどれか。ただし点Pはアンテナの位置を示す</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="206" height="140" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-41.png" alt="" class="wp-image-5809"/></figure>



<p class="wp-block-paragraph">①ホイップアンテナ<br>②水平半波長ダイポールアンテナ<br>③垂直半波長ダイポールアンテナ<br>④ブラウン（グランドプレーン）アンテナ</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問3</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>水平面内の指向性が図のようになるアンテナは次のうちどれか。ただし点Pはアンテナの位置を示す</strong></p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="233" height="154" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-45.png" alt="" class="wp-image-5814"/></figure>



<p class="wp-block-paragraph">①パラボナアンテナ<br>②水平半波長ダイポールアンテナ<br>③垂直半波長ダイポールアンテナ<br>④ブラウン（グランドプレーン）アンテナ</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問4</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>水平面内の指向性が図のようになるアンテナは次のうちどれか。ただし点Pはアンテナの位置を示す</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="378" height="165" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-47.png" alt="" class="wp-image-5816" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-47.png 378w, https://health-outdoor.com/wp-content/uploads/2026/05/image-47-300x131.png 300w" sizes="(max-width: 378px) 100vw, 378px" /></figure>



<p class="wp-block-paragraph">①八木アンテナ<br>②水平半波長ダイポールアンテナ<br>③スリーブアンテナ<br>④ホイップアンテナ</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問5</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>陸上を移動する無線局が通常の通信で使用するアンテナの指向特性は、次のうちどれが適しているか</strong></p>



<p class="wp-block-paragraph">①垂直面内で指向性を持つこと<br>②水平面内で全方向性（無指向性）なこと<br>③水平面内で指向性を持つこと<br>④垂直面内で全方向性（無指向性）なこと</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問6</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>八木アンテナをスタック（積み重ね）に接続する場合があるがこの目的はなにか</strong></p>



<p class="wp-block-paragraph">①固有波長を短くするため<br>②指向性を鋭くするため<br>③指向性を広くするため<br>④固有波長を長くするため</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問7</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>21MHz用ブラウンアンテナ（グランドプレーンアンテナ）の放射エレメントの長さは、ほぼいくらか</strong></p>



<p class="wp-block-paragraph">①3.6m<br>②14.3m<br>③7.2m<br>④1.8m</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span><br><span class="bold-red">波長は 300 ÷ 21 ≒ 14.3m。ブラウンアンテナの放射エレメントは約1/4波長なので、14.3 ÷ 4 ≒ 3.6m</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問8</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>八木アンテナにおいて給電線はどの素子に繋げばよいか</strong></p>



<p class="wp-block-paragraph">①導波器<br>②反射器<br>③放射器<br>④全ての素子</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問9</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>八木アンテナの導波器の素子数が増えた場合アンテナの性能はどうなるか</strong></strong></p>



<p class="wp-block-paragraph">①電波の通達距離が短くなる<br>②放射抵抗が高くなる<br>③指向性が広がる<br>④利得が上がる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問10</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>八木アンテナの導波器がなくなった場合、アンテナの性能はどうなるか</strong></strong></p>



<p class="wp-block-paragraph">①電波が放射されなくなる<br>②指向方向が逆転する<br>③全方向性（無指向性）になる<br>④指向性が広がる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問11</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図に示す八木アンテナの放射器はどれか</strong></strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="286" height="259" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-42.png" alt="" class="wp-image-5811"/></figure>



<p class="wp-block-paragraph">①B<br>②A<br>③C<br>④D</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span><br><span class="bold-red">八木アンテナは短いほうから導波器＜放射器＜反射器。給電線は放射器に繋ぐ</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問12</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図に</strong>示した八木アンテナにおいて最も強く電波を放射するのはどの方向か。</strong></p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="429" height="275" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-46.png" alt="" class="wp-image-5815" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-46.png 429w, https://health-outdoor.com/wp-content/uploads/2026/05/image-46-300x192.png 300w" sizes="(max-width: 429px) 100vw, 429px" /></figure>



<p class="wp-block-paragraph">①a<br>②b<br>③c<br>④d</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span><br><span class="bold-red">八木アンテナは短いほうから導波器＜放射器＜反射器。給電線は放射器に繋ぐ</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問13</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図</strong>は三素子八木アンテナの構造を示したものである。各素子の名称の組み合わせで正しいのは、次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="293" height="178" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-44.png" alt="" class="wp-image-5813"/></figure>



<p class="wp-block-paragraph">①A反射器　B導波器　C放射器<br>②A導波器　B反射器　C放射器<br>③A反射器　B放射器　C導波器<br>④A導波器　B放射器　C反射器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span><br><span class="bold-red">八木アンテナは短いほうから導波器＜放射器＜反射器。給電線は放射器に繋ぐ</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問1４</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図に示す半波長ダイポールアンテナの給電点インピーダンスはほぼいくらか</strong></strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="298" height="182" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-43.png" alt="" class="wp-image-5812"/></figure>



<p class="wp-block-paragraph">①36Ω<br>②75Ω<br>③150Ω<br>④300Ω</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②<br>半波長ダイポールアンテナの給電点インピーダンスは、およそ75Ωとして覚えます。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問15</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>半波長ダイポールアンテナを使用して電波を放射したとき、アンテナ電流の値が0.2Aであったこのときの放射電力の値として、最も近いのはどれか。ただし熱損失となるアンテナ導体の抵抗分は無視するものとする</strong></p>



<p class="wp-block-paragraph">①3.5W<br>②2W<br>③3W<br>④4.8W</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問16</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>半波長ダイポールアンテナの放射電力を10Wにするためのアンテナ電流の値として、最も近いのはどれか。ただし熱損失となるアンテナ導体の抵抗分は無視するものとする</strong></p>



<p class="wp-block-paragraph">①3.7A<br>②0.37A<br>③1.4A<br>④0.18A</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問17</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>7MHz用の半波長ダイポールアンテナの長さはほぼいくらか</strong></strong></p>



<p class="wp-block-paragraph"></p>



<p class="wp-block-paragraph">①43m<br>②11m<br>③21m<br>④5m</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問18</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>28MHz用の八木アンテナの放射器の長さはほぼいくらか</strong></p>



<p class="wp-block-paragraph"></p>



<p class="wp-block-paragraph">①3m<br>②21m<br>③5m<br>④12m</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span><br></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問19</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>同軸給電線の特性で望ましくない特性は次のうちどれか</strong></strong></p>



<p class="wp-block-paragraph">①給電線から電波が放射されない<br>②高周波エネルギーを無駄なく伝送する<br>③特性インピーダンスが均一である<br>④給電線で電波が受信できる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問20</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>1/4波長垂直接地アンテナの説明で誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①固有周波数の奇数倍の周波数にも同調する<br>②接地抵抗が大きいほど効率がいい<br>③指向性は水平面内では全方向性（無指向性）である<br>④電流分布は先端で零、底部で最大となる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：</span><span class="bold-red">②</span>　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問21</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次に挙げたアンテナの給電方法の記述で、正しいものはどれか</strong></p>



<p class="wp-block-paragraph">①給電点において電圧分布を最大にする給電方法を電圧給電という<br>②給電点において電流分布を最大にする給電方法を電圧給電という<br>③給電点において電圧分布を最大にする給電方法を電流給電という<br>④給電点において電流分布を最小にする給電方法を電流給電という</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span>　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問22</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>波長10mの電波の周波数はいくらになるか</strong></p>



<p class="wp-block-paragraph">①90MHz<br>②30MHz<br>③60MHz<br>④15MHz</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span><br><span class="bold-red">周波数MHzと波長mの関係は、λ=300/f <br>波長10mなら、300÷10=30MHz</span></p>



<p class="has-text-align-right wp-block-paragraph">　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問23</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図電波の波長をλm周波数をf MHzとした時、次式の□内に当てはまる数字はどれか</strong><br>λ=□/f m</p>



<p class="wp-block-paragraph">①300<br>②200<br>③600<br>④800</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span><br><span class="bold-red">周波数MHzと波長mの関係は、λ=300/f <br>波長10mなら、300÷10=30MHz</span></p>



<p class="has-text-align-right wp-block-paragraph">　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問24</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>高さが10mの1/4垂直接地アンテナの固有波長は次のうちどれか</strong></p>



<p class="wp-block-paragraph">①40m<br>②3.5m<br>③20m<br>④2.5m</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①　固有波長×1/4=10</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問25</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>給電線に必要な電気的条件で誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①給電線から投射される電波が強いこと<br>②絶縁耐力が十分であること<br>③導体のオーム損が少ないこと<br>④誘電体損が少ないこと</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問26</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述は、八木アンテナについて述べたもので誤っているのは、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①導波器の素子数の多いものは指向性が鋭い<br>②指向性アンテナである<br>③接地アンテナの一種である<br>④反射器、放射器および導波器で構成される</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<h2 class="wp-block-heading"><span id="toc2">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</span></h2>



<h3 class="wp-block-heading"><span id="toc3">法規関係の模擬問題はこちら</span></h3>



<p class="has-text-align-left wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1/" data-type="post" data-id="5843">・無線局の免許（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-2/" data-type="post" data-id="5365">・無線設備（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-3/" data-type="post" data-id="5374">・無線従事者（18問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-4/" data-type="post" data-id="5378">・運用（62問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-5/" data-type="post" data-id="5383">・監督（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-6/" data-type="post" data-id="5388">・業務書類（19問）</a></p>



<h3 class="wp-block-heading"><span id="toc4">無線工学の模擬問題はこちら</span></h3>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-1/" data-type="post" data-id="5755">・基礎工学（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-2/" data-type="post" data-id="5781">・電子回路（30問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-3/" data-type="post" data-id="5833">・送信機（40問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-4/" data-type="post" data-id="5823">・受信機（39問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-5/" data-type="post" data-id="5800">・電波障害（13問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-6/" data-type="post" data-id="5804">・電源（16問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-7/" data-type="post" data-id="5808">・アンテナ（26問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-8/" data-type="post" data-id="5818">・電波伝搬（33問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-9/" data-type="post" data-id="5793">・測定法（17問）</a></p>



<h2 class="wp-block-heading"><span id="toc5">試験対策をもっとやるなら</span></h2>



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		<title>これをやれば受かる！アマチュア無線4級の模擬問題集(工学⑧：電波伝搬)</title>
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		<dc:creator><![CDATA[health.outdoor]]></dc:creator>
		<pubDate>Sun, 24 May 2026 10:42:42 +0000</pubDate>
				<category><![CDATA[アウトドア]]></category>
		<category><![CDATA[バックカントリー]]></category>
		<category><![CDATA[狩猟・猟銃]]></category>
		<guid isPermaLink="false">https://health-outdoor.com/?p=5818</guid>

					<description><![CDATA[このページでは、第4級アマチュア無線技士の無線工学から「電波伝搬」に関する模擬問題を33問まとめています。電離層、地表波、直接波、大地反射波、VHFの伝わり方、フェージング、スポラジックE層など、4アマで出やすい内容を確 [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p class="wp-block-paragraph">このページでは、第4級アマチュア無線技士の無線工学から「電波伝搬」に関する模擬問題を33問まとめています。<br>電離層、地表波、直接波、大地反射波、VHFの伝わり方、フェージング、スポラジックE層など、4アマで出やすい内容を確認できます。<br>まずは答えを見ずに解き、間違えた問題だけ繰り返し復習してください。</p>




  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-8" checked><label class="toc-title" for="toc-checkbox-8">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">模擬問題集（無線工学：電波伝搬）全33問</a></li><li><a href="#toc2" tabindex="0">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</a><ol><li><a href="#toc3" tabindex="0">法規関係の模擬問題はこちら</a></li><li><a href="#toc4" tabindex="0">無線工学の模擬問題はこちら</a></li></ol></li><li><a href="#toc5" tabindex="0">試験対策をもっとやるなら</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">模擬問題集（無線工学：電波伝搬）全33問</span></h2>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す電波通路A・BのうちAの伝わり方をするのは次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="375" height="138" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-48.png" alt="" class="wp-image-5820" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-48.png 375w, https://health-outdoor.com/wp-content/uploads/2026/05/image-48-300x110.png 300w" sizes="(max-width: 375px) 100vw, 375px" /></figure>



<p class="wp-block-paragraph"><br><br>①直接波<br>②地表波<br>③大地反射波<br>④電離層反射波</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①　Bが大地反射波</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問2</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図は、周波数の違いにより電波の伝わり方が異なることを示したものである。近い周波数の組み合わせで正しいものはどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="429" height="301" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-49.png" alt="" class="wp-image-5821" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-49.png 429w, https://health-outdoor.com/wp-content/uploads/2026/05/image-49-300x210.png 300w" sizes="(max-width: 429px) 100vw, 429px" /></figure>



<p class="wp-block-paragraph"><br><br>①A：7MHz    　B：435MHz<br>②A：145MHz　B：7MHz<br>③A：7MHz　    B：145MHz<br>④A：435MHz　B：145MHz</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問3</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで正しいのはどれか</strong></p>



<p class="wp-block-paragraph">電波が電離層を突き抜ける時の減衰は、周波数が高いほど「A」反射するときの減衰は周波数が高いほど「B」なる</p>



<p class="wp-block-paragraph">①A小さく　B小さく<br>②A大きく　B小さく<br>③A大きく　B大きく<br>④A小さく　B大きく</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問4</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせでただしいのはどれか</strong></p>



<p class="wp-block-paragraph">電波が電離層を突き抜ける時の減衰は、周波数が「A」ほど少なく、また、反射されるときに受ける減衰は、周波数が「B」ほど大きくなる</p>



<p class="wp-block-paragraph">①A低い　B低い<br>②A低い　B高い<br>③A高い　B低い<br>④A高い　B高い</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：</span><span class="bold-red">④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問5</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>短波が地球の裏側まで到達して通信できることがあるのはなぜか</strong></p>



<p class="wp-block-paragraph">①人工衛星を中継して送るのに適しているため<br>②地表波の減衰が少ないため<br>③大地の中を伝わる性質があるため<br>④電離層と地球表面との間を反射しながら伝わるため</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④　短波は電離層と地表の間で反射を繰り返すことで、遠距離まで届くことがあります。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問6</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>電離層のうちで地上からの高さが最も高いのはどの層か</strong></p>



<p class="wp-block-paragraph">①D層<br>②Es層<br>③E層<br>④F層</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問7</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>電離層が生成されるのに最も影響があるのは、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①太陽<br>②低気圧<br>③海水温度<br>④流星</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問8</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>電波が電離層で反射される条件として特に関係ないものはどれか</strong></p>



<p class="wp-block-paragraph">①電子密度<br>②送信電力<br>③入射角<br>④周波数</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問9</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>地上波の説明で正しいのはどれか</strong></p>



<p class="wp-block-paragraph">①電離層を突き抜けて伝わる電波<br>②大地に反射して伝わる電波<br>③見通し距離内の空間を直線的に伝わる電波<br>④大地の表面に沿って伝わる電波</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問10</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>昼間21MHzバンドの電波で通信を行っていたが夜間になって遠距離の地域が通信不能となった。そこで周波数バンドを切り替えたところ、再び通信が可能となった。通信を可能にした周波数バンドは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①144　MHz<br>②7　MHz<br>③28　MHz<br>④50　MHz</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②　夜間は電離層の電子密度が下がるため、高い周波数は突き抜けやすくなります。そのため、より低い周波数帯に切り替えることがあります。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問11</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで正しいのはどれか</strong></p>



<p class="wp-block-paragraph">電波は電界と磁界が「A」になっており、「B」が大地と平行になっている電波を水平偏波という</p>



<p class="wp-block-paragraph">①A直角　B電界<br>②A平行　B磁界<br>③A平行　B電界<br>④A直角　B磁界</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問12</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで正しいのはどれか</strong></p>



<p class="wp-block-paragraph">電波が電離層を突き抜けるときに受ける減衰は、周波数が「A」ほど少なく、また反射されるときに受ける減衰は、周波数が「B」ほど大きくなる</p>



<p class="wp-block-paragraph">①A低い　B高い<br>②A高い　B低い<br>③A高い　B高い<br>④A低い　B低い</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問13</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで正しいのはどれか</strong></p>



<p class="wp-block-paragraph">電離層反射波を使用して昼間に通信が可能な場合であっても夜間に電離層の電子密度が「A」なり、電波が突き抜けるので、「B」周波数の電波に切り替えて通信を行う</p>



<p class="wp-block-paragraph">①A小さく　B高い<br>②A大きく　B低い<br>③A大きく　B高い<br>④A小さく　B低い</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問14</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで正しいのはどれか</strong></p>



<p class="wp-block-paragraph">スポラジックE層は、「A」の昼間に多く発生し、「B」の電波も反射することがある</p>



<p class="wp-block-paragraph">①A低い　B高い<br>②A高い　B低い<br>③A高い　B高い<br>④A低い　B低い</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問15</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで正しいのはどれか</strong></p>



<p class="wp-block-paragraph">電波は、磁界と電界が直角になっていて、電界が「A」と平行になっている電波を「B」偏波と言い、垂直になっている電波を「C」偏波という</p>



<p class="wp-block-paragraph">①A大地　　　B垂直　C水平<br>②Aアンテナ　B垂直　C水平<br>③Aアンテナ　B水平　C垂直<br>④A大地　　　B水平　C垂直</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問16</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>地上波の伝わり方で、誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①見通し距離内の空間を直接伝わる<br>②大地で反射されて伝わる<br>③電離層で反射されて伝わる<br>④大地の表面に沿って伝わる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問17</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>フェージングが起こる原因で、誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①電波の減弱の程度が時間的に変動するため<br>②異なった伝播経路を通った電波が相互に干渉するため<br>③電離層で電波が反射したり突き抜けたりするため<br>④電波の周波数が時間的に変動するため</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問18</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで正しいのはどれか</strong></p>



<p class="wp-block-paragraph">スポラジックE層は「A」の昼間に多く発生し、「B」の電波も反射することがある</p>



<p class="wp-block-paragraph">①A：冬季　B：VHF<br>②A：冬季　B：UHF<br>③A：夏季　B：VHF<br>④A：夏季　B：UHF</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問19</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>短波帯の伝搬で生じる、不感地帯と特に関係がないものはどれか</strong></p>



<p class="wp-block-paragraph">①送信電力<br>②周波数<br>③気象<br>④電離層</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問20</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>超短波（VHF）を使った見通し外の遠距離の通信において、伝搬路上に山岳があり送受信点のそれぞれから、その山頂が見通せるとき、比較的安定した通信ができることがあるのは、一般的にどの現象によるものか</strong></p>



<p class="wp-block-paragraph">①電波の干渉<br>②電波の回折<br>③電波の直進性<br>④電波の屈折</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②　VHFは基本的に見通し通信ですが、山岳などの障害物の縁で回折し、見通し外でも通信できることがあります。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問21</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>超短波（VHF）において、高い山岳の陰で見通しのきかない場所でも通信ができることがあるがこれは次のうちどの現象によるものか</strong></p>



<p class="wp-block-paragraph">①電波の干渉<br>②電波の回折<br>③電波の直進性<br>④電波の屈折</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問22</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>超短波（VHF）の電波が異常に遠方まで伝わることがあるが、その原因と関係のないものはどれか</strong></p>



<p class="wp-block-paragraph">①地表波<br>②スポラジックE層<br>③山岳による回折<br>④散乱現象</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問23</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>超短波（VHF）において、通信可能な距離を延ばすための方法として誤っているのは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①アンテナの高さを高くする<br>②アンテナの放射角を高角度にする<br>③利得の高いアンテナを用いる<br>④鋭い指向性のアンテナを用いる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問24</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>超短波（VHF）では、一般にアンテナの高さを高くしたほうが電波の通達距離が伸びるのはなぜか</strong></p>



<p class="wp-block-paragraph">①見通し距離が伸びるから<br>②対流圏散乱波が伝わりやすくなるから<br>③地上波の減衰が少なくなるから<br>④スポラディックE層反射によって伝わりやすくなるから</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問25</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>超短波（VHF）の電波の伝播は、主として次のうちどれによっているか</strong></p>



<p class="wp-block-paragraph">①地表波と電離層反射波<br>②直接波と電離層反射波<br>③地表波と大地反射波<br>④直接波と大地反射波</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④　VHFは主に見通し距離内を、直接波や大地反射波として伝わります。地表波や電離層反射波が主役ではありません。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問26</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>超短波（VHF）の伝わり方で正しいのはどれか</strong></p>



<p class="wp-block-paragraph">①昼間と夜間では伝わり方が大きく異なる<br>②電離層と大地との間で反射を繰り返して伝わる<br>③主に見通し距離内を伝わる<br>④主に地表波が伝わる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問27</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>超短波（VHF）の伝わり方の特徴で、誤っているのは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①地表波はすぐ減衰する<br>②直接波を利用できない<br>③大地で反射される<br>④電離層を突き抜ける</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問28</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで正しいのはどれか</strong></p>



<p class="wp-block-paragraph">送信所から発射された短波帯の電波が「A」で反射されて、初めて地上に達する地点と送信所との地上距離を「B」という</p>



<p class="wp-block-paragraph">①A電離層　B跳躍距離<br>②A電離層　B焦点距離<br>③A大地　　B焦点距離<br>④A大地　　B跳躍距離</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問29</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「」内に入れるべき字句の組み合わせで正しいのはどれか</strong></p>



<p class="wp-block-paragraph">送信所から短波を発射した時「A」が減衰して受信されなくなった時点から、「B」が最初に地表に戻ってくる地点までを不感地帯という</p>



<p class="wp-block-paragraph">①A直接波　B電離層反射波<br>②A地表波　B電離層反射波<br>③A地表波　B大地反射波<br>④A直接波　B大地反射波</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問30</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>次の記述は電波について述べたものである。誤っているのはどれか</strong></strong></p>



<p class="wp-block-paragraph">①真空中は毎秒30万キロメートルの速度で伝搬する<br>②光と同じく電磁波である<br>③大気中は音波と同じ速度で伝搬する<br>④光より波長が長い</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問31</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>3.5 MHzから28 MHzまでのアマチュアバンドにおいて主に利用する電波の伝わり方は、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①直接波<br>②対流圏波<br>③電離層反射波<br>④大地反射波</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問32</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>スポラジックE層についての記述のうち、正しいのは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①主として春季に多く発生する<br>②主として夏季に多く発生する<br>③主として冬期に多く発生する<br>④主として秋季に多く発生する</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問33</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>地上波の説明で誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①電離層で反射されて伝わる<br>②大地に反射して伝わる電波<br>③見通し距離内の空間を直線的に伝わる<br>④大地の表面に沿って伝わる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<h2 class="wp-block-heading"><span id="toc2">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</span></h2>



<h3 class="wp-block-heading"><span id="toc3">法規関係の模擬問題はこちら</span></h3>



<p class="has-text-align-left wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1/" data-type="post" data-id="5843">・無線局の免許（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-2/" data-type="post" data-id="5365">・無線設備（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-3/" data-type="post" data-id="5374">・無線従事者（18問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-4/" data-type="post" data-id="5378">・運用（62問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-5/" data-type="post" data-id="5383">・監督（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-6/" data-type="post" data-id="5388">・業務書類（19問）</a></p>



<h3 class="wp-block-heading"><span id="toc4">無線工学の模擬問題はこちら</span></h3>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-1/" data-type="post" data-id="5755">・基礎工学（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-2/" data-type="post" data-id="5781">・電子回路（30問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-3/" data-type="post" data-id="5833">・送信機（40問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-4/" data-type="post" data-id="5823">・受信機（39問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-5/" data-type="post" data-id="5800">・電波障害（13問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-6/" data-type="post" data-id="5804">・電源（16問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-7/" data-type="post" data-id="5808">・アンテナ（26問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-8/" data-type="post" data-id="5818">・電波伝搬（33問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-9/" data-type="post" data-id="5793">・測定法（17問）</a></p>



<h2 class="wp-block-heading"><span id="toc5">試験対策をもっとやるなら</span></h2>



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		<title>これをやれば受かる！アマチュア無線4級の模擬問題集(工学④：送信機)</title>
		<link>https://health-outdoor.com/amateur-radio-test-1-4/</link>
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		<dc:creator><![CDATA[health.outdoor]]></dc:creator>
		<pubDate>Sun, 24 May 2026 10:42:37 +0000</pubDate>
				<category><![CDATA[アウトドア]]></category>
		<category><![CDATA[バックカントリー]]></category>
		<category><![CDATA[狩猟・猟銃]]></category>
		<guid isPermaLink="false">https://health-outdoor.com/?p=5823</guid>

					<description><![CDATA[目次 模擬問題集（無線工学：送信機）全40他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ法規関係の模擬問題はこちら無線工学の模擬問題はこちら試験対策をもっとやるなら 模擬問題 [&#8230;]]]></description>
										<content:encoded><![CDATA[

  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-10" checked><label class="toc-title" for="toc-checkbox-10">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">模擬問題集（無線工学：送信機）全40</a></li><li><a href="#toc2" tabindex="0">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</a><ol><li><a href="#toc3" tabindex="0">法規関係の模擬問題はこちら</a></li><li><a href="#toc4" tabindex="0">無線工学の模擬問題はこちら</a></li></ol></li><li><a href="#toc5" tabindex="0">試験対策をもっとやるなら</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">模擬問題集（無線工学：送信機）全40</span></h2>



<p class="wp-block-paragraph">このページでは、第4級アマチュア無線技士の無線工学から「送信機」に関する模擬問題を40問まとめています。<br>FM送信機、SSB送信機、DSB送信機、IDC回路、ALC回路、平衡変調器、周波数逓倍器、緩衝増幅器など、4アマで出やすい内容を確認できます。<br>まずは答えを見ずに解き、間違えた問題だけ繰り返し復習してください。</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>FM送信機において、大きな音声信号が加わっても一定の周波数偏移内に収めるためには、図の空欄の部分に何を設ければよいか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="352" height="175" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-50.png" alt="" class="wp-image-5824" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-50.png 352w, https://health-outdoor.com/wp-content/uploads/2026/05/image-50-300x149.png 300w" sizes="(max-width: 352px) 100vw, 352px" /></figure>



<p class="wp-block-paragraph"><br>①IDC回路<br>②AGC回路<br>③緩衝増幅器<br>④音声増幅器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問２</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>FM（F3E）送信機において、変調波を得るには、図の空欄の部分に何を設ければよいか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="343" height="176" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-53.png" alt="" class="wp-image-5827" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-53.png 343w, https://health-outdoor.com/wp-content/uploads/2026/05/image-53-300x154.png 300w" sizes="(max-width: 343px) 100vw, 343px" /></figure>



<p class="wp-block-paragraph"><br>①周波数逓倍器<br>②位相変調器<br>③緩衝増幅器<br>④平衡変調器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問3</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図は、理想的に動作するSSB（J3E）送信機の構成の一部を示したものである。図の出力側の周波数成分で正しいのは次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="277" height="172" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-55.png" alt="" class="wp-image-5829"/></figure>



<p class="wp-block-paragraph"><br>①上側波帯と下側波帯<br>②下側波帯<br>③上側波帯<br>④上側波帯、下側波帯および搬送波</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問4</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図は、SSB（J3E）送信機の構成の一部を示したものである。空欄の部分に入れるべき名称は次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="446" height="156" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-56.png" alt="" class="wp-image-5830" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-56.png 446w, https://health-outdoor.com/wp-content/uploads/2026/05/image-56-300x105.png 300w" sizes="(max-width: 446px) 100vw, 446px" /></figure>



<p class="wp-block-paragraph"><br>①緩衝増幅器<br>②帯域フィルタ（BPF）<br>③周波数逓倍器<br>④水晶発振器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問5</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>FM送信機において、大きな音声信号が加わっても一定の周波数偏移内に収めるためには、図の空欄の部分に何を設ければよいか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="555" height="201" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-51.png" alt="" class="wp-image-5825" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-51.png 555w, https://health-outdoor.com/wp-content/uploads/2026/05/image-51-500x181.png 500w, https://health-outdoor.com/wp-content/uploads/2026/05/image-51-300x109.png 300w" sizes="(max-width: 555px) 100vw, 555px" /></figure>



<p class="wp-block-paragraph"><br>①A：IDC回路　B：周波数逓倍器<br>②A：AGC回路　B：検波器<br>③A：ALC回路　B：周波数逓倍器<br>④A：IDC回路　B：検波器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問6</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図はFM（F3E）送信機の構成を示したものである。空欄に入れるべき名称の組み合わせで正しいのは、次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="555" height="201" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-51.png" alt="" class="wp-image-5825" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-51.png 555w, https://health-outdoor.com/wp-content/uploads/2026/05/image-51-500x181.png 500w, https://health-outdoor.com/wp-content/uploads/2026/05/image-51-300x109.png 300w" sizes="(max-width: 555px) 100vw, 555px" /></figure>



<p class="wp-block-paragraph"><br>①A：IDC回路　B：周波数逓倍器<br>②A：AGC回路　B：検波器<br>③A：ALC回路　B：周波数逓倍器<br>④A：IDC回路　B：検波器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問7</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すDSB（A3E）送信機の構成において、送信周波数fcと発振周波数foとの関係で正しいのはどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="463" height="117" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-54.png" alt="" class="wp-image-5828" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-54.png 463w, https://health-outdoor.com/wp-content/uploads/2026/05/image-54-300x76.png 300w" sizes="(max-width: 463px) 100vw, 463px" /></figure>



<p class="wp-block-paragraph"><br>①fo=1/2fc<br>②fo=1/6fc<br>③fo=1/3fc<br>④fo=1/5c</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問8</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すSSB（J3E）波を発生させるための回路において、出力に現れる周波数成分は次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="346" height="172" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-57.png" alt="" class="wp-image-5831" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-57.png 346w, https://health-outdoor.com/wp-content/uploads/2026/05/image-57-300x149.png 300w" sizes="(max-width: 346px) 100vw, 346px" /></figure>



<p class="wp-block-paragraph"><br>①fc＋2fs<br>②fc＋fs<br>③fc±fs<br>④fc-fs</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問9</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すSSB（J3E）波を発生させるための回路の構成において、出力にあらわれる周波数は次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="418" height="169" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-52.png" alt="" class="wp-image-5826" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-52.png 418w, https://health-outdoor.com/wp-content/uploads/2026/05/image-52-300x121.png 300w" sizes="(max-width: 418px) 100vw, 418px" /></figure>



<p class="wp-block-paragraph"><br>①A： 1503.5kHz<br>②A： 1509.5kHz<br>③A： 1505kHz<br>④A： 1508kHz</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問10</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述はSSB（J3E）送信機に用いられるどの回路について述べたものか</strong></p>



<p class="wp-block-paragraph">この回路は電力増幅器にある一定レベル以上の入力電圧が加わった時に、送信電波の波形がひずんだり、占有周波数帯幅が過度に広がらないようにする為、励振増幅器などの増幅度を自動的に下げて電力増幅器の入力レベルを制限する。<br><br>①IDC回路<br>②ALC回路<br>③AFC回路<br>④ANL回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②　ALC回路は、電力増幅器への入力が大きくなりすぎないように自動で利得を下げ、送信波形のひずみや帯域の広がりを防ぎます。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問11</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の文の「」内に入れるべき字句の組み合わせで、正しいのはどれか</strong></p>



<p class="wp-block-paragraph">SSB（J3E）送信機の動作において、音声信号波と第一局部発振器で作られた第一副搬送波を「A」に加えると、上側波帯と下側波帯が生ずる。この両者波帯のうち一方の側波帯を「B」で取り出して中間周波数のSSB波を作る<br><br>①A周波数変換器　B帯域フィルタ<br>②A周波数変換器　B中間増幅器<br>③A平衡変調器　　B帯域フィルタ<br>④A平衡変調器　　B中間増幅器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問12</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の文の「」内に入れるべき字句の組み合わせで、正しいのはどれか</strong></p>



<p class="wp-block-paragraph">SSB（J3E）送信機では、「A」増幅器の入力レベルを制限し、送信出力があまりひずまないように「B」回路が用いられる<br><br>①A：電力　B：ALC<br>②A：緩衝　B：IDC<br>③A：電力　B：IDC<br>④A：緩衝　B：ALC</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問13</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>送信機の構成において、SSB（J3E）波を得るために用いられる変調器は次のうちどれか</strong></p>



<p class="wp-block-paragraph">①位相変調器<br>②高電力変調器<br>③平衡変調器<br>④周波数変調器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問14</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB送信機において、搬送波の抑圧に役立っているのはどれか</strong></p>



<p class="wp-block-paragraph">①VOX回路<br>②クラリファイア（またはRIT）<br>③平衡変調器<br>④ALC回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問15</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB送信機において、下側波帯又は上側波帯のいずれか一方のみを取り出す目的で設けるものは、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①周波数混合器<br>②帯域フィルタ<br>③周波数逓倍器<br>④平衡変調器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②SSBでは、上側波帯または下側波帯のどちらか一方だけを取り出すために帯域フィルタを使います。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問16</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB（J3E）送信機の構成及び各部の働きで、誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①変調波を周波数逓倍器に加えて、所要の周波数を得ている<br>②送信出力波形の歪みを軽減するため、ALC回路を設けている<br>③不要な側波帯を除去するため、帯域フィルタを設けている<br>④平衡変調器を設けて、搬送波を除去している</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問17</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB（J3E）トランシーバーの送信部において、送話の音声の有無によって、自動的に送信と受信を切り替える働きをするのは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①VOX回路<br>②帯域フィルタ<br>③平衡変調器<br>④ALC回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問18</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>DSB（A3E）送信機において、占有周波数帯幅が広がる場合の説明として誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①変調器の周波数特性が高域で低下している<br>②送信機が寄生振動を起こしている<br>③変調度が100%を超えて過変調になっている<br>④変調器の出力に非直線ひずみの成分がある</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問19</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>DSB（A3E）送信機において、音声信号で変調された搬送波はどのようになっているか</strong></p>



<p class="wp-block-paragraph">①振幅が変化している<br>②周波数が変化している<br>③断続している<br>④振幅・周波数ともに変化はない</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問20</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>DSB（A3E）送信機において、音声信号によって搬送波をどのように変化させるか</strong></p>



<p class="wp-block-paragraph">①振幅が変化させる<br>②周波数を変化させる<br>③搬送波の発射を断続させる<br>④振幅と周波数をもとに変化させる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①　DSBは振幅が変化、FM周波数が変化</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問21</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>DSB（A3E）送信機が過変調の状態になったとき、どのような現象が生じるか</strong></p>



<p class="wp-block-paragraph">①寄生振動が発生する<br>②送信周波数が変動する<br>③側波帯が広がる<br>④占有周波数帯幅が狭くなる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問22</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述はDSB（A3E）方式と比べた時のSSB（J3E）方式の特徴について述べたものである。誤っているのは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①受信帯域幅が1/2になるので雑音が減少する<br>②送受信機の回路構成が簡単である<br>③占有周波数帯幅が狭い<br>④音声などの信号が加わった時だけ電波が発射される</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問23</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>送信機の緩衝増幅器についての記述で誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①発振周波数の整数倍の周波数を取り出す<br>②発振器との結合は疎である<br>③発信器と周波数逓倍器の間に設けられる<br>④後段の影響による発振器の発振周波数の変動を防ぐ</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①緩衝増幅器は、後段回路の影響で発振器の周波数が変動するのを防ぐために入れます。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問24</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>送信機の緩衝増幅器は、どのような目的で設けられているか</strong></p>



<p class="wp-block-paragraph">①後段の影響により、発振器の発振周波数が変動するのを防ぐため<br>②所要の送信機出力まで増幅するため<br>③発振周波数の整数倍の周波数を取り出すため<br>④終段増幅器の入力として、十分な励振電圧を得るため</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問25</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>送信機の発振周波数を安定するための方法として、誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①発振器の次段に緩衝増幅器を設ける<br>②発振器として水晶発振回路を用いる<br>③発振器の電源電圧の変動を少なくする<br>④発振器と後段との結合を密にする</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問26</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>送信機の回路において緩衝増幅器の配置で正しいのは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①周波数逓倍器と励振増倍器の間<br>②励振増倍器と電力増幅器の間<br>③発振器の次段<br>④音声増幅器の次段</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問27</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>間接FM方式のFM（F3E）送信機に通常使用されていないのは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①水晶発振器<br>②平衡変調器<br>③周波数逓倍器<br>④IDC回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問28</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>間接方式のFM（F3E）送信機において、周波数偏移を常に一定数以下に収めるための回路は、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①IDC回路<br>②スケルチ回路<br>③ALC回路<br>④VOX回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①IDC回路は、FM送信機で周波数偏移が大きくなりすぎないように制限する回路です。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問29</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>FM（F3E）送信機において、周波数偏移を大きくするにはどうすればいいか</strong></p>



<p class="wp-block-paragraph">①緩衝増幅器の増幅度を小さくする<br>②水晶発振器の発振周波数を低くする<br>③変調器と次段の結合を疎にする<br>④周波数逓倍器の逓倍数を大きくする</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問30</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>FM（F3E）送信機において、IDC回路を設ける目的は何か</strong></p>



<p class="wp-block-paragraph">①高周波の発生を除去する<br>②発振周波数を安定にする<br>③周波数偏移を制限する<br>④寄生振動の発生を防止する</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問31</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>FM（F3E）送信機についての記述で正しいのはどれか</strong></p>



<p class="wp-block-paragraph">①IDC回路で送信周波数の変動を防止している<br>②平衡変調器で周波数変調を得ている<br>③終段電力増幅器で変調を行っている<br>④周波数逓倍器で所要の周波数偏移を得ている</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問32</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述はFM（F3E）通信方式の一般的な特徴について述べたものである。誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①受信入力レベルが少しくらい変動しても、出力レベルがほぼ一定である<br>②同じ周波数の妨害があっても、受信希望の信号波が強ければ妨害波は抑圧される<br>③ AM通信方式に比べて、受信出力の音質が良い<br>④周波数偏移を大きくしても、占有周波数帯幅は変わらない</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問33</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>FM（F3E）送信機では、音声信号によって搬送波をどのように変化させるか</strong></p>



<p class="wp-block-paragraph">①搬送波の発射を断続させる<br>②振幅と周波数をもとに変化させる<br>③振幅を変化させる<br>④周波数を変化させる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問34</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述は、送信機が備えなければならない条件について述べたものである。「」内に入れるべき字句の組み合わせで、正しいのはどれか</strong></p>



<p class="wp-block-paragraph">１，送信電波は周波数が安定で占有周波数帯域ができるだけ「A」こと<br>２，スプリアス発射電力が「B」こと</p>



<p class="wp-block-paragraph">①A：広い　B：小さい<br>②A：狭い　B：大きい<br>③A：狭い　B：小さい<br>④A：広い　B：大きい</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問35</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述は、送信機が備えなければならない条件について述べたものである。「」内に入れるべき字句の組み合わせで、正しいのはどれか</strong></p>



<p class="wp-block-paragraph">１，送信電波の「A」が安定であること<br>２，送信電波の占有周波数帯域はできるだけ「B」こと<br>３，スプリアス発射電力が「C」こと</p>



<p class="wp-block-paragraph">①A：電力　　B：狭い　C：大きい<br>②A：周波数　B：広い　C：大きい<br>③A：周波数　B：狭い　C：小さい<br>④A：電力　　B：広い　C：小さい</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問36</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>送信機の周波数逓倍器は、どのような目的で設けられることがあるか</strong></p>



<p class="wp-block-paragraph">①高調波に同調されて、これを抑圧するため<br>②発振機の発振周波数から低調波を取り出すため<br>③発振機の発振周波数を整数倍して、希望の周波数にするため<br>④発振機の発振周波数が変動するのを防ぐため</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問37</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>無線電話送受信装置において、プレストークボタン（PTTスイッチ）を押すとどのような動作状態になるか</strong></p>



<p class="wp-block-paragraph">①アンテナが送信機に接続され、送信状態となる<br>②アンテナが受信機に接続され、送信状態となる<br>③アンテナが受信機に接続され、受信状態となる<br>④アンテナが送信機と受信機に接続され、送受信状態となる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問38</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>無線送信機に疑似負荷を用いる目的として正しいものはどれか</strong></p>



<p class="wp-block-paragraph">①調整中に電波を外部に出さないため<br>②送信機の消費電力を節約するため<br>③調整不良の箇所をただちに発見するため<br>④送信周波数を安定にするため</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①疑似負荷は、送信機の調整中に電波を外部へ出さないために使います。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問39</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>自動車に搭載する無線電話装置で、自動車雑音に強い変調方式として適したものは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①DSB（A3E）方式<br>②SSB（J3E）方式<br>③SSB（H3E）方式<br>④FM（F3E）方式</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問40</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>振幅変調方式の送信機で上側波帯または下側波帯の一つを発射するのは、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①FM（F3E）送信機<br>②DSB（A3E）送信機<br>③SSB（J3E）送信機<br>④CW（A1A）送信機</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<h2 class="wp-block-heading"><span id="toc2">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</span></h2>



<h3 class="wp-block-heading"><span id="toc3">法規関係の模擬問題はこちら</span></h3>



<p class="has-text-align-left wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1/" data-type="post" data-id="5843">・無線局の免許（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-2/" data-type="post" data-id="5365">・無線設備（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-3/" data-type="post" data-id="5374">・無線従事者（18問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-4/" data-type="post" data-id="5378">・運用（62問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-5/" data-type="post" data-id="5383">・監督（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-6/" data-type="post" data-id="5388">・業務書類（19問）</a></p>



<h3 class="wp-block-heading"><span id="toc4">無線工学の模擬問題はこちら</span></h3>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-1/" data-type="post" data-id="5755">・基礎工学（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-2/" data-type="post" data-id="5781">・電子回路（30問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-3/" data-type="post" data-id="5833">・送信機（40問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-4/" data-type="post" data-id="5823">・受信機（39問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-5/" data-type="post" data-id="5800">・電波障害（13問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-6/" data-type="post" data-id="5804">・電源（16問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-7/" data-type="post" data-id="5808">・アンテナ（26問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-8/" data-type="post" data-id="5818">・電波伝搬（33問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-9/" data-type="post" data-id="5793">・測定法（17問）</a></p>



<h2 class="wp-block-heading"><span id="toc5">試験対策をもっとやるなら</span></h2>



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		<title>これをやれば受かる！アマチュア無線4級の模擬問題集(工学⑥：電源)</title>
		<link>https://health-outdoor.com/amateur-radio-test-1-6/</link>
					<comments>https://health-outdoor.com/amateur-radio-test-1-6/#respond</comments>
		
		<dc:creator><![CDATA[health.outdoor]]></dc:creator>
		<pubDate>Sun, 24 May 2026 10:42:32 +0000</pubDate>
				<category><![CDATA[アウトドア]]></category>
		<category><![CDATA[バックカントリー]]></category>
		<category><![CDATA[狩猟・猟銃]]></category>
		<guid isPermaLink="false">https://health-outdoor.com/?p=5804</guid>

					<description><![CDATA[このページでは、第4級アマチュア無線技士の無線工学から「電源」に関する模擬問題を16問まとめています。蓄電池の容量、直列・並列接続、整流回路、ツェナーダイオード、変圧器、リチウムイオン蓄電池など、4アマで出やすい内容を確 [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p class="wp-block-paragraph">このページでは、第4級アマチュア無線技士の無線工学から「電源」に関する模擬問題を16問まとめています。<br>蓄電池の容量、直列・並列接続、整流回路、ツェナーダイオード、変圧器、リチウムイオン蓄電池など、4アマで出やすい内容を確認できます。<br>まずは答えを見ずに解き、間違えた問題だけ繰り返し復習してください。</p>




  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-12" checked><label class="toc-title" for="toc-checkbox-12">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">模擬問題集（無線工学：電源）全16問</a></li><li><a href="#toc2" tabindex="0">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</a><ol><li><a href="#toc3" tabindex="0">法規関係の模擬問題はこちら</a></li><li><a href="#toc4" tabindex="0">無線工学の模擬問題はこちら</a></li></ol></li><li><a href="#toc5" tabindex="0">試験対策をもっとやるなら</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">模擬問題集（無線工学：電源）全16問</span></h2>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>容量（10時間率）30Ahの蓄電池を、１Aで連続使用すると通常は何時間使用できるか</strong><br><br>①10時間<br>②1時間<br>③6時間<br>④30時間</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④　30時間　</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問2</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>容量（10時間率）30Ahの蓄電池を、3Aで連続使用すると通常は何時間使用できるか</strong><br><br>①10時間<br>②1時間<br>③6時間<br>④3時間</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①　10時間　</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問3</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>交流入力50Hzの全波整流回路の出力にあらわれる脈流の周波数はいくらか</strong></p>



<p class="wp-block-paragraph">①25Hz<br>②50Hz<br>③100Hz<br>④150Hz</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問4</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>端子電圧6V、容量60 Ahの蓄電池を3個直列に接続した時、その合成電圧と合成容量の値の組み合わせとして、正しいのは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①合成電圧6V　合成容量180Ah<br>②合成電圧18V　合成容量60Ah<br>③合成電圧18V　合成容量180Ah<br>④合成電圧6V　合成容量60Ah</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問5</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>同じ規格の乾電池を並列に接続して使用する目的は次のうちどれか</strong></p>



<p class="wp-block-paragraph">①雑音を少なくする<br>②電圧を高くする<br>③電圧を低くする<br>④使用時間を長くする</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問6</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>接合ダイオードは整流に適した特性を持っている。接合ダイオードの記述として次にあげた特性のうち正しいのはどれか</strong></p>



<p class="wp-block-paragraph">①順方向電圧を加えたとき内部抵抗は小さい<br>②逆方向電圧を加えたとき内部抵抗は小さい<br>③順方向電圧を加えたとき電流は流れにくい<br>④逆方向電圧を加えたとき電流は容易に流れる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問7</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>ツェナーダイオードは次のどの回路に用いられる</strong></p>



<p class="wp-block-paragraph">①共振回路<br>②発振回路<br>③定電圧回路<br>④平滑回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問8</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図は半導体ダイオードを用いた半波整流回路である.この回路に流れる電流の方向と出力電圧の極性との組合せで正しいのはどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="340" height="191" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-39.png" alt="" class="wp-image-5805" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-39.png 340w, https://health-outdoor.com/wp-content/uploads/2026/05/image-39-300x169.png 300w, https://health-outdoor.com/wp-content/uploads/2026/05/image-39-120x68.png 120w, https://health-outdoor.com/wp-content/uploads/2026/05/image-39-160x90.png 160w, https://health-outdoor.com/wp-content/uploads/2026/05/image-39-320x180.png 320w, https://health-outdoor.com/wp-content/uploads/2026/05/image-39-277x156.png 277w" sizes="(max-width: 340px) 100vw, 340px" /></figure>



<p class="wp-block-paragraph">①電流iの方向b　出力電圧の極性d<br>②電流iの方向a　出力電圧の極性d<br>③電流iの方向b　出力電圧の極性c<br>④電流iの方向a　出力電圧の極性c</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問9</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す整流回路において、この名称と出力側a点の電圧の極性との組合せで、正しいものは次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="340" height="191" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-40.png" alt="" class="wp-image-5806" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-40.png 340w, https://health-outdoor.com/wp-content/uploads/2026/05/image-40-300x169.png 300w, https://health-outdoor.com/wp-content/uploads/2026/05/image-40-120x68.png 120w, https://health-outdoor.com/wp-content/uploads/2026/05/image-40-160x90.png 160w, https://health-outdoor.com/wp-content/uploads/2026/05/image-40-320x180.png 320w, https://health-outdoor.com/wp-content/uploads/2026/05/image-40-277x156.png 277w" sizes="(max-width: 340px) 100vw, 340px" /></figure>



<p class="wp-block-paragraph">①名称：全波整流回路　a点の極性：負<br>②名称：半波整流回路　a点の極性：負<br>③名称：全波整流回路　a点の極性：正<br>④名称：半波整流回路　a点の極性：正</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問10</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の「　」内に入れるべき字句の組み合わせで、正しいのはどれか</strong></p>



<p class="wp-block-paragraph">シリコン接合ダイオードに加える「A」を次第に増加していくと、ある電圧で急に大電流が流れるようになる。このような特性のダイオードを「B」と言う</p>



<p class="wp-block-paragraph">①A順方向電圧　B定電圧ダイオード<br>②A順方向電圧　Bバラクタダイオード<br>③A逆方向電圧　B定電圧ダイオード<br>④A逆方向電圧　Bバラクタダイオード</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問11</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>二次側コイルの巻き数が10回の電源変圧器において一次側にAC100Vを加えたところに、二次側に5Vの電圧が現れた。この電源変圧器の一次側コイルの巻き数はいくらか</strong></p>



<p class="wp-block-paragraph">①50回<br>②200回<br>③20回<br>④100回</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問12</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>一次巻線と二次巻線の比が1：3の電源変圧器において、一次側にAC100Vを加えたとき、二次側にあらわれる電圧はいくらか</strong></strong></p>



<p class="wp-block-paragraph">①300V<br>②33.3V<br>③173V<br>④900V</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問13</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>ニッケルカドミウム電池の特徴について誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①繰り返し充電することができない<br>②この電池一個の端子電圧は1.2Vである<br>③過放電に対して耐久性が優れている<br>④比較的大きな電流が取り出せる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問14</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>次の記述はどのような種類の電池について述べたものか</strong></strong></p>



<p class="wp-block-paragraph">この電池一個あたりの電圧は1.2Vで、放電終止電圧は1.0Vである。また電池の内部抵抗が非常に小さく、電池容積に比較して大電流を取り出すことができ充放電ができる。</p>



<p class="wp-block-paragraph">①ニッケルカドミウム電池<br>②鉛蓄電池<br>③マンガン乾電池<br>④太陽電池</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問15</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>電源の定電圧回路に用いられるダイオードは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①発光ダイオード<br>②ツェナーダイオード<br>③バラクタダイオード<br>④フォトダイオード</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問16</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述はリチウムイオン蓄電池の特徴について述べたものである。「　」内に入れるべき字句の組み合わせで、正しいのはどれか</strong></p>



<p class="wp-block-paragraph">リチウムイオン蓄電池は小型軽量で電池一個の端子電圧は1.2Vより「A」。また自然に少しずつ放電する自己放電量が少なく、メモリー効果がないので継ぎ足し充電「B」</p>



<p class="wp-block-paragraph">①A高い　Bできる<br>②A低い　Bできる<br>③A高い　Bできない<br>④A低い　Bできない</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<h2 class="wp-block-heading"><span id="toc2">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</span></h2>



<h3 class="wp-block-heading"><span id="toc3">法規関係の模擬問題はこちら</span></h3>



<p class="has-text-align-left wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1/" data-type="post" data-id="5843">・無線局の免許（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-2/" data-type="post" data-id="5365">・無線設備（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-3/" data-type="post" data-id="5374">・無線従事者（18問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-4/" data-type="post" data-id="5378">・運用（62問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-5/" data-type="post" data-id="5383">・監督（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-6/" data-type="post" data-id="5388">・業務書類（19問）</a></p>



<h3 class="wp-block-heading"><span id="toc4">無線工学の模擬問題はこちら</span></h3>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-1/" data-type="post" data-id="5755">・基礎工学（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-2/" data-type="post" data-id="5781">・電子回路（30問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-3/" data-type="post" data-id="5833">・送信機（40問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-4/" data-type="post" data-id="5823">・受信機（39問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-5/" data-type="post" data-id="5800">・電波障害（13問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-6/" data-type="post" data-id="5804">・電源（16問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-7/" data-type="post" data-id="5808">・アンテナ（26問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-8/" data-type="post" data-id="5818">・電波伝搬（33問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-9/" data-type="post" data-id="5793">・測定法（17問）</a></p>



<h2 class="wp-block-heading"><span id="toc5">試験対策をもっとやるなら</span></h2>



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		<title>これをやれば受かる！アマチュア無線4級の模擬問題集(工学⑤：電波障害)</title>
		<link>https://health-outdoor.com/amateur-radio-test-1-5/</link>
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		<dc:creator><![CDATA[health.outdoor]]></dc:creator>
		<pubDate>Sun, 24 May 2026 10:42:26 +0000</pubDate>
				<category><![CDATA[アウトドア]]></category>
		<category><![CDATA[バックカントリー]]></category>
		<category><![CDATA[狩猟・猟銃]]></category>
		<guid isPermaLink="false">https://health-outdoor.com/?p=5800</guid>

					<description><![CDATA[このページでは、第4級アマチュア無線技士の無線工学から「電波障害」に関する模擬問題を13問まとめています。TVI、BCI、高調波、混変調、フィルター、SWRメーター、スポラディックE層による混信など、4アマで出やすい内容 [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p class="wp-block-paragraph">このページでは、第4級アマチュア無線技士の無線工学から「電波障害」に関する模擬問題を13問まとめています。<br>TVI、BCI、高調波、混変調、フィルター、SWRメーター、スポラディックE層による混信など、4アマで出やすい内容を確認できます。<br>まずは答えを見ずに解き、間違えた問題だけ繰り返し復習してください。</p>




  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-14" checked><label class="toc-title" for="toc-checkbox-14">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">模擬問題集（無線工学：電波障害）全13問</a></li><li><a href="#toc2" tabindex="0">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</a><ol><li><a href="#toc3" tabindex="0">法規関係の模擬問題はこちら</a></li><li><a href="#toc4" tabindex="0">無線工学の模擬問題はこちら</a></li></ol></li><li><a href="#toc5" tabindex="0">試験対策をもっとやるなら</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">模擬問題集（無線工学：電波障害）全13問</span></h2>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>50MHzの電波を発射したところ、150MHzの電波を受信している受信機に妨害を与えた。送信機側で考えられる妨害の原因は次のうちどれか</strong><br><br>①第２高調波が強く発射されている<br>②第５高調波が強く発射されている<br>③第３高調波が強く発射されている<br>④第４高調波が強く発射されている</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③　</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問2</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>送信機で28MHzの周波数の電波を発射したところ、FM放送受信に混信を与えた。送信側で考えられる混信の原因で正しいものはどれか</strong><br><br>①同軸給電線が断線している<br>②スケルチを強くかけすぎている<br>③第３高周波が強く発射されている<br>④ 1/3倍の低調波が発射されている</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③　</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問3</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>TVIを軽減するため、送信設備側で行う対策として誤っているのは、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①アマチュア局のアンテナとTV受像用のアンテナとの間をできる限り離す<br>②送信機と給電線との間にTV電波を通しやすいフィルターを挿入する<br>③送信機の調整を正しくとり、接地を完全にする<br>④送信機を厳重に遮蔽する</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問4</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>テレビジョン受信機やラジオ受信機に、付近の送信機から強力な電波が加わると、受信された信号が受信器の内部で変調され、TVIやBCIを起こすことがある。この現象を何変調と呼んでいるか</strong></p>



<p class="wp-block-paragraph">①混変調<br>②位相変調<br>③過変調<br>④平衡変調</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問5</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>他の無線局に受信障害を与える恐れが最も低いのは、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①妨害を受ける受信アンテナが近い時<br>②送信電力が低下したとき<br>③寄生振動がある時<br>④高調波が発射された時</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問6</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>アマチュア局から発射された電波のうち、短波の基本波によって他の超短波帯（VHF）の受信機に電波障害が生じた。この防止対策として受信機のアンテナ端子と給電線の間に次のどれを挿入すればよいか</strong></p>



<p class="wp-block-paragraph">①ラインフィルタ<br>②高域フィルタ（HPF）<br>③アンテナカプラ<br>④低域フィルタ（LPF）</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問7</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>送信設備から電波が発射されている時、BCIの発生原因として挙げられた次の現象のうち誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①過変調になっている<br>②アンテナ結合回路の結合度が疎になっている<br>③寄生振動が発生している<br>④送信アンテナが送電線に接近している</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問8</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>アマチュア局の電波が近所のラジオ受信機に電波障害を与えることがあるが、これを通常何と言っているか</strong></p>



<p class="wp-block-paragraph">①BCI<br>②アンプI<br>③TVI<br>④スプリアス妨害</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問9</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>アマチュア局の電波が近所のテレビジョン受像機に電波障害を与えることがあるが、これを通常何と言っているか</strong></p>



<p class="wp-block-paragraph">①BCI<br>②アンプI<br>③TVI<br>④スプリアス妨害</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問10</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>受信機に電波障害を与えるおそれがないものは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①電波時計<br>②高周波ミシン<br>③電気溶接機<br>④自動車の点火栓</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問11</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>夏の昼間に50MHz帯で交信を行っていたところ、数100km離れた同じ周波数帯の受信機に混合妨害を与えた。この原因は何か</strong></strong></p>



<p class="wp-block-paragraph">①スポラディックE層による伝搬<br>②大気圏の回折による遠距離伝搬<br>③高調波放射<br>④空電</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問12</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>ラジオ受信機に付近の送信機から強力な電波が加わると、受信された信号が受信器の内部で変調されBCIを起こすことがある。この現象を何変調と呼んでいるか</strong></strong></p>



<p class="wp-block-paragraph">①混変調<br>②過変調<br>③位相変調<br>④平衡変調</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問13</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>測定器を利用して行う下記の操作のうち定在波比測定器（SWRメーター）が使用されるのは次のうちどれか</strong></strong></p>



<p class="wp-block-paragraph">①アンテナと給電線の整合状態を調べるとき<br>②共振回路の共振周波数を測定するとき<br>③寄生発射の有無を調べるとき<br>④送信周波数を測定するとき</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<h2 class="wp-block-heading"><span id="toc2">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</span></h2>



<h3 class="wp-block-heading"><span id="toc3">法規関係の模擬問題はこちら</span></h3>



<p class="has-text-align-left wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1/" data-type="post" data-id="5843">・無線局の免許（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-2/" data-type="post" data-id="5365">・無線設備（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-3/" data-type="post" data-id="5374">・無線従事者（18問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-4/" data-type="post" data-id="5378">・運用（62問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-5/" data-type="post" data-id="5383">・監督（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-6/" data-type="post" data-id="5388">・業務書類（19問）</a></p>



<h3 class="wp-block-heading"><span id="toc4">無線工学の模擬問題はこちら</span></h3>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-1/" data-type="post" data-id="5755">・基礎工学（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-2/" data-type="post" data-id="5781">・電子回路（30問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-3/" data-type="post" data-id="5833">・送信機（40問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-4/" data-type="post" data-id="5823">・受信機（39問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-5/" data-type="post" data-id="5800">・電波障害（13問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-6/" data-type="post" data-id="5804">・電源（16問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-7/" data-type="post" data-id="5808">・アンテナ（26問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-8/" data-type="post" data-id="5818">・電波伝搬（33問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-9/" data-type="post" data-id="5793">・測定法（17問）</a></p>



<h2 class="wp-block-heading"><span id="toc5">試験対策をもっとやるなら</span></h2>



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		<title>これをやれば受かる！アマチュア無線4級の模擬問題集(工学①：基礎工学)</title>
		<link>https://health-outdoor.com/amateur-radio-test-1-1/</link>
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		<dc:creator><![CDATA[health.outdoor]]></dc:creator>
		<pubDate>Sun, 24 May 2026 10:42:20 +0000</pubDate>
				<category><![CDATA[アウトドア]]></category>
		<category><![CDATA[バックカントリー]]></category>
		<category><![CDATA[狩猟・猟銃]]></category>
		<guid isPermaLink="false">https://health-outdoor.com/?p=5755</guid>

					<description><![CDATA[このページでは、第4級アマチュア無線技士の無線工学から「基礎工学」に関する模擬問題を35問まとめています。オームの法則、合成抵抗、コンデンサ、コイル、共振回路、トランジスタ、半導体素子など、4アマで出やすい内容を確認でき [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p class="wp-block-paragraph">このページでは、第4級アマチュア無線技士の無線工学から「基礎工学」に関する模擬問題を35問まとめています。<br>オームの法則、合成抵抗、コンデンサ、コイル、共振回路、トランジスタ、半導体素子など、4アマで出やすい内容を確認できます。<br>まずは答えを見ずに解き、間違えた問題だけ繰り返し復習してください。</p>




  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-16" checked><label class="toc-title" for="toc-checkbox-16">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">模擬問題集（無線工学：基礎工学）全35問</a></li><li><a href="#toc2" tabindex="0">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</a><ol><li><a href="#toc3" tabindex="0">法規関係の模擬問題はこちら</a></li><li><a href="#toc4" tabindex="0">無線工学の模擬問題はこちら</a></li></ol></li><li><a href="#toc5" tabindex="0">試験対策をもっとやるなら</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">模擬問題集（無線工学：基礎工学）全35問</span></h2>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す正弦波交流において、周期と振幅との組合せで、正しいのはどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="373" height="269" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-1.png" alt="" class="wp-image-5757" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-1.png 373w, https://health-outdoor.com/wp-content/uploads/2026/05/image-1-300x216.png 300w" sizes="(max-width: 373px) 100vw, 373px" /></figure>



<p class="wp-block-paragraph">周期ー振幅<br>①AーC<br>②BーD<br>③BーC<br>④AーD</p>
</div></div>



<p class="has-text-align-left wp-block-paragraph"><span class="bold-red">解：</span><span class="bold-red">③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問２</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す回路において、端子ab間の電圧の値で正しいのはどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="407" height="183" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-2.png" alt="" class="wp-image-5758" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-2.png 407w, https://health-outdoor.com/wp-content/uploads/2026/05/image-2-300x135.png 300w" sizes="(max-width: 407px) 100vw, 407px" /></figure>



<p class="wp-block-paragraph">①150V<br>②100V<br>③75V<br>④50V</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：<strong>④50V　直流は電流が同じ、</strong>並列は電圧が同じ</span>　150×1/3=50V</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問３</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す回路において、端子bc間の電圧の値で正しいのはどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="388" height="183" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-20.png" alt="" class="wp-image-5776" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-20.png 388w, https://health-outdoor.com/wp-content/uploads/2026/05/image-20-300x141.png 300w" sizes="(max-width: 388px) 100vw, 388px" /></figure>



<p class="wp-block-paragraph">①150V<br>②100V<br>③75V<br>④50V</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：<strong>②100V　直流は電流が同じ、</strong>並列は電圧が同じ</span>　<span class="bold-red">150×2/3=100V</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問４</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図に示す回路において、端子ab間の合成抵抗の値で正しいのはどれか</strong></strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="361" height="124" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-23.png" alt="" class="wp-image-5779" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-23.png 361w, https://health-outdoor.com/wp-content/uploads/2026/05/image-23-300x103.png 300w" sizes="(max-width: 361px) 100vw, 361px" /></figure>



<p class="wp-block-paragraph">①10Ω<br>②5Ω<br>③20Ω<br>④15Ω</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：<strong><strong>③10Ω</strong></strong></span><span class="bold-red"><strong><strong>　</strong></strong>直列部分と並列部分に分けて計算します。並列抵抗は「積÷和」で求めます。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問５</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図に示す回路において、端子ab間の合成抵抗の値で正しいのはどれか</strong></strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="360" height="129" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-3.png" alt="" class="wp-image-5759" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-3.png 360w, https://health-outdoor.com/wp-content/uploads/2026/05/image-3-300x108.png 300w" sizes="(max-width: 360px) 100vw, 360px" /></figure>



<p class="wp-block-paragraph">①25Ω<br>②45Ω<br>③10Ω<br>④15Ω</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④<strong><strong>15Ω　計算はめんどくさいので問題を覚えちゃいましょう</strong></strong></span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問６</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図に示す回路において、端子ab間の電圧の値で正しいのはどれか</strong></strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="441" height="206" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-13.png" alt="" class="wp-image-5769" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-13.png 441w, https://health-outdoor.com/wp-content/uploads/2026/05/image-13-300x140.png 300w" sizes="(max-width: 441px) 100vw, 441px" /></figure>



<p class="wp-block-paragraph">①20V<br>②40V<br>③10V<br>④30V</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①　40×1/2=20V</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問７</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すように、磁極の間に置いた導体に紙面の裏から表の方向に向かって電流が流れた時、磁力線の方向と導体の受ける力の方向との組み合わせで正しいのはどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="328" height="122" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-4.png" alt="" class="wp-image-5760" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-4.png 328w, https://health-outdoor.com/wp-content/uploads/2026/05/image-4-300x112.png 300w" sizes="(max-width: 328px) 100vw, 328px" /></figure>



<p class="wp-block-paragraph">①磁力線の方向→　力の方向↓<br>②磁力線の方向←　力の方向↓<br>③磁力線の方向←　力の方向↑<br>④磁力線の方向→　力の方向↑</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span>　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問８</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すように</strong>、<strong>磁極の間に置いた導体に紙面の裏から表の方向に向かって電流が流れた時、磁力線の方向と導体の受ける力の方向との組み合わせで正しいのはどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="324" height="114" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-14.png" alt="" class="wp-image-5770" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-14.png 324w, https://health-outdoor.com/wp-content/uploads/2026/05/image-14-300x106.png 300w, https://health-outdoor.com/wp-content/uploads/2026/05/image-14-320x114.png 320w" sizes="(max-width: 324px) 100vw, 324px" /></figure>



<p class="wp-block-paragraph">①磁力線の方向→　力の方向↓<br>②磁力線の方向←　力の方向↓<br>③磁力線の方向←　力の方向↑<br>④磁力線の方向→　力の方向↑</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span>　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問９</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>電磁石のコイルの巻き方向及び電池の極性を図に示すとおりにしたとき、電磁石の両端a及びbの極性の組み合わせで正しいのは次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="266" height="138" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-22.png" alt="" class="wp-image-5778"/></figure>



<p class="wp-block-paragraph">①aS　bN<br>②aS　bS<br>③aN　bS<br>④aN　bN</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①　右ねじの法則</span>　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問10</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すように２本の軟鉄棒（AとB）にそれぞれコイルを巻き、2個が直線状になるように吊るしてスイッチSを閉じると、AとBはどのようになるか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="310" height="177" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-17.png" alt="" class="wp-image-5773" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-17.png 310w, https://health-outdoor.com/wp-content/uploads/2026/05/image-17-300x171.png 300w, https://health-outdoor.com/wp-content/uploads/2026/05/image-17-120x68.png 120w, https://health-outdoor.com/wp-content/uploads/2026/05/image-17-160x90.png 160w" sizes="(max-width: 310px) 100vw, 310px" /></figure>



<p class="wp-block-paragraph">①互いに反発しあう<br>②互いに引き付けあう<br>③ひきつけ合ったり離れたりする<br>④特に変化しない</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①　右ねじの法則</span>　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問11</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>高圧電気の絶縁に使われるものは次のうちどれか。</strong></p>



<p class="wp-block-paragraph">①磁器<br>②アルミニウム<br>③ゲルマニウム<br>④亜鉛</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解</span><span class="bold-red">：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問12</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す並列共振回路において、インピーダンスをZ、電流をiとしたとき、共振時にこれらの値はどのようになるか。</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="269" height="230" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-21.png" alt="" class="wp-image-5777"/></figure>



<p class="wp-block-paragraph">①Z最大　i最大<br>②Z最大　i最小<br>③Z最小　i最大<br>④Z最小　i最小</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②　抵抗が大きくなれば、電流は小さくなる</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問13</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す並列共振回路において、インピーダンスをZ、電流をiとしたとき、共振時にこれらの値はどのようになるか。</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="238" height="186" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-5.png" alt="" class="wp-image-5761"/></figure>



<p class="wp-block-paragraph">①Z最大　i最大<br>②Z最大　i最小<br>③Z最小　i最大<br>④Z最小　i最小</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②　抵抗が大きくなれば、電流は小さくなる</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問14</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>電界効果トランジスタ（FET）の電極と、一般の接合形トランジスタの電極との組み合わせで、その働きが対応しているのはどれか</strong></p>



<p class="wp-block-paragraph">①ドレイン　エミッタ<br>②ドレイン　ベース<br>③ソース　　ベース<br>④ソース　　エミッタ</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④　下記図で覚えましょう　</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問15</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すNPN形トランジスタの図記号において、電極aの名称は次のうちどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="166" height="226" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-15.png" alt="" class="wp-image-5771"/></figure>



<p class="wp-block-paragraph">①エミッタ<br>②ゲート<br>③ベース<br>④コレクタ</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④　下記図で覚えましょう　</span></p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="611" height="216" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-6.png" alt="" class="wp-image-5762" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-6.png 611w, https://health-outdoor.com/wp-content/uploads/2026/05/image-6-500x177.png 500w, https://health-outdoor.com/wp-content/uploads/2026/05/image-6-300x106.png 300w" sizes="(max-width: 611px) 100vw, 611px" /></figure>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問16</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す回路において、電圧Eを4倍にすると、抵抗Rに消費される電力は、元の値の何倍になるか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="182" height="159" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-7.png" alt="" class="wp-image-5763"/></figure>



<p class="wp-block-paragraph">①4倍<br>②16倍<br>③8倍<br>④2倍</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②　電力は P=V²/R で求めます。抵抗Rが同じなら、電圧を4倍にすると電力は4²=16倍になります。</span>　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問17</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す回路において、抵抗Rを2倍にすると、回路に流れる電流は元の値の何倍になるか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="186" height="167" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-19.png" alt="" class="wp-image-5775"/></figure>



<p class="wp-block-paragraph">①1/2倍<br>②2倍<br>③4倍<br>④1倍</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：</span><span class="bold-red">①</span>　<span class="bold-red">V=IR（電圧＝電流×抵抗）</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問18</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す回路において、抵抗Rを1/2倍にすると、回路に流れる電流は元の値の何倍になるか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="182" height="159" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-16.png" alt="" class="wp-image-5772"/></figure>



<p class="wp-block-paragraph">①1/2倍<br>②2倍<br>③4倍<br>④1倍</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span>　<span class="bold-red">V=IR（電圧＝電流×</span><span class="bold-red">抵抗</span><span class="bold-red">）</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問19</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図に示す回路に流れる電流iの値で最も近いのは、次のうちどれか。</strong></strong></p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="307" height="183" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-8.png" alt="" class="wp-image-5764" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-8.png 307w, https://health-outdoor.com/wp-content/uploads/2026/05/image-8-300x179.png 300w" sizes="(max-width: 307px) 100vw, 307px" /></figure>



<p class="wp-block-paragraph">①300mA<br>②30mA<br>③0.3mA<br>④3mA</p>



<hr class="wp-block-separator has-alpha-channel-opacity"/>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②<strong>　V=IR（電圧＝電流×抵抗）　100=i×3000　</strong></span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問20</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図に示す回路において、コンデンサのリアクタンスで最も近いのは、次のうちどれか。</strong></strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="238" height="156" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-12.png" alt="" class="wp-image-5768"/></figure>



<p class="wp-block-paragraph">①300mΩ<br>②350Ω<br>③35Ω<br>④18Ω</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問21</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の組み合わせは</strong>、<strong>コイル及びコンデンサのリアクタンスと周波数の比例関係を示すものである。正しいのはどれか。</strong></p>



<p class="wp-block-paragraph">①コイル正比例　コンデンサ反比例<br>②コイル正比例　コンデンサ正比例<br>③コイル反比例　コンデンサ反比例<br>④コイル反比例　コンデンサ正比例</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：</span><span class="bold-red">①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問22</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>４Ωの抵抗に直流電流を加えたところ、100Wの電力が消費された。抵抗に加えられた電圧の値で、正しいのは次のうちどれか。</strong></p>



<p class="wp-block-paragraph">①0.2V<br>②5V<br>③20V<br>④400V</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③P=I²Rより、100=I²×4。I=5Aなので、V=IR=5×4=20V。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問23</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す回路において、端子ab間の合成静電容量の値で正しいのはどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="280" height="132" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-9.png" alt="" class="wp-image-5765" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-9.png 280w, https://health-outdoor.com/wp-content/uploads/2026/05/image-9-277x132.png 277w" sizes="(max-width: 280px) 100vw, 280px" /></figure>



<p class="wp-block-paragraph">①30μF<br>②10μF<br>③20μF<br>④15μF</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④　</span><br><span class="bold-red">並列は足し算、直列は積/和で計算</span><br><span class="bold-red">並列10＋20=30μF、30×30/30+30=15μF　</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問24</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す回路において、端子ab間の合成静電容量の値で正しいのはどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="293" height="145" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-11.png" alt="" class="wp-image-5767"/></figure>



<p class="wp-block-paragraph">①30μF<br>②12μF<br>③50μF<br>④10μF</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③　</span><br><span class="bold-red">並列は足し算、直列は積/和で計算</span><br><span class="bold-red">20＋30＝50μF　</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問25</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示す電界効果トランジスタ（FET）の図記号において、電極aの名称はどれか</strong></p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="447" height="179" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-10.png" alt="" class="wp-image-5766" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-10.png 447w, https://health-outdoor.com/wp-content/uploads/2026/05/image-10-300x120.png 300w" sizes="(max-width: 447px) 100vw, 447px" /></figure>



<p class="wp-block-paragraph">①ゲート<br>②コレクタ<br>③ドレイン<br>④ソース</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：<strong>①</strong></span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問26</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述で誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①コンデンサの静電容量が大きくなるほど、交流電流は流れにくくなる<br>②導線の断面積が小さくなるほど、交流電流は流れにくくなる<br>③導線の抵抗が大きくなるほど、交流電流は流れにくくなる<br>④コイルのインダクタンスが大きくなるほど、交流電流は流れにくくなる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問27</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次のうち、単位としてオームΩを用いるのはどれか</strong></p>



<p class="wp-block-paragraph">①静電容量<br>②コンダクタンス<br>③リアクタンス<br>④インダクタンス</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問28</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>インダクタンスの単位を表すものは、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①ヘンリーH<br>②オームΩ<br>③ファラドF<br>④アンペアA</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：<strong><strong>①</strong></strong></span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問29</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図の記号であらわされる半導体素子の名称はどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="197" height="145" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-18.png" alt="" class="wp-image-5774"/></figure>



<p class="wp-block-paragraph">①発光ダイオード<br>②トンネルダイオード<br>③バラクタダイオード<br>④フォトダイオード</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問30</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>コイルの中に磁性体を入れると、その自己インダクタンスはどうなるか</strong></p>



<p class="wp-block-paragraph">①大きくなる<br>②不安定となる<br>③変わらない<br>④小さくなる</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：</span><span class="bold-red">①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問31</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><span class="bold">コイルに電流を流すとコイル周囲に磁界が発生する。この磁界を強くする方法で誤っているのはどれか。</span></p>



<p class="wp-block-paragraph">①コイルの中に軟鉄心を入れる<br>②コイルの断面積を大きくする<br>③コイルに流れる電流を大きくする<br>④コイルの巻き数を多くする</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：<strong><strong>②</strong></strong></span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問32</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>最大値が140Vの正弦波交流電流の実効値で最も近いのはどれか</strong></p>



<p class="wp-block-paragraph">①280V<br>②100V<br>③200V<br>④70V</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問33</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>電圧、電流及び抵抗の関係を表す式で正しいのは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①電流＝抵抗/電圧<br>②電圧＝電流/抵抗<br>③電圧=抵抗/電流<br>④電流=電圧/抵抗</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：</span><span class="bold-red">④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問34</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>半導体を用いた電子部品の温度が上昇すると、その部品の動作にどのような変化が起きるか</strong></p>



<p class="wp-block-paragraph">①半導体の抵抗が増加し、電流が減少する<br>②半導体の抵抗が増加し、電流が増加する<br>③半導体の抵抗が減少し、電流が減少する<br>④半導体の抵抗が減少し、電流が増加する</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：<strong>④</strong></span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問35</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>直流電源100Vで動作する、消費電力500Wの負荷抵抗の値で正しいのは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①5Ω<br>②20Ω<br>③25Ω<br>④50Ω</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<h2 class="wp-block-heading"><span id="toc2">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</span></h2>



<h3 class="wp-block-heading"><span id="toc3">法規関係の模擬問題はこちら</span></h3>



<p class="has-text-align-left wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1/" data-type="post" data-id="5843">・無線局の免許（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-2/" data-type="post" data-id="5365">・無線設備（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-3/" data-type="post" data-id="5374">・無線従事者（18問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-4/" data-type="post" data-id="5378">・運用（62問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-5/" data-type="post" data-id="5383">・監督（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-6/" data-type="post" data-id="5388">・業務書類（19問）</a></p>



<h3 class="wp-block-heading"><span id="toc4">無線工学の模擬問題はこちら</span></h3>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-1/" data-type="post" data-id="5755">・基礎工学（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-2/" data-type="post" data-id="5781">・電子回路（30問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-3/" data-type="post" data-id="5833">・送信機（40問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-4/" data-type="post" data-id="5823">・受信機（39問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-5/" data-type="post" data-id="5800">・電波障害（13問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-6/" data-type="post" data-id="5804">・電源（16問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-7/" data-type="post" data-id="5808">・アンテナ（26問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-8/" data-type="post" data-id="5818">・電波伝搬（33問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-9/" data-type="post" data-id="5793">・測定法（17問）</a></p>



<h2 class="wp-block-heading"><span id="toc5">試験対策をもっとやるなら</span></h2>



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		<title>これをやれば受かる！アマチュア無線4級の模擬問題集(工学②：電子回路)</title>
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		<dc:creator><![CDATA[health.outdoor]]></dc:creator>
		<pubDate>Sun, 24 May 2026 10:42:14 +0000</pubDate>
				<category><![CDATA[アウトドア]]></category>
		<category><![CDATA[バックカントリー]]></category>
		<category><![CDATA[狩猟・猟銃]]></category>
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					<description><![CDATA[このページでは、第4級アマチュア無線技士の無線工学から「電子回路」に関する模擬問題を30問まとめています。AM・FM変調、A級・B級・C級増幅、検波回路、SSB・DSB、変調度、発振器、周波数混合器など、4アマで出やすい [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p class="wp-block-paragraph">このページでは、第4級アマチュア無線技士の無線工学から「電子回路」に関する模擬問題を30問まとめています。<br>AM・FM変調、A級・B級・C級増幅、検波回路、SSB・DSB、変調度、発振器、周波数混合器など、4アマで出やすい内容を確認できます。<br>まずは答えを見ずに解き、間違えた問題だけ繰り返し復習してください。</p>




  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-18" checked><label class="toc-title" for="toc-checkbox-18">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">模擬問題集（無線工学：電子回路）全30問</a></li><li><a href="#toc2" tabindex="0">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</a><ol><li><a href="#toc3" tabindex="0">法規関係の模擬問題はこちら</a></li><li><a href="#toc4" tabindex="0">無線工学の模擬問題はこちら</a></li></ol></li><li><a href="#toc5" tabindex="0">試験対策をもっとやるなら</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">模擬問題集（無線工学：電子回路）全30問</span></h2>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>同じ音声信号を用いて振幅変調（AM）と周波数変調（FM）を行ったとき、AM波に比べてFM波の占有周波数帯域幅の一般的な特徴はどれか</strong><br><br>①同じ<br>②狭い<br>③広い<br>④半分</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：</span><span class="bold-red">③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問２</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>振幅変調の電波の占有周波数帯域と比べた時、周波数変調された電波の占有周波数帯域の一般的な特徴はどれか</strong></p>



<p class="wp-block-paragraph">①広い<br>②狭い<br>③半分<br>④同じ</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：</span><span class="bold-red">①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問3</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>最大周波数偏移が5kHzの場合、最高周波数3kHzの信号波で変調するとFМ波の占有周波数帯域幅はいくらになるか</strong></p>



<p class="wp-block-paragraph">①30<br>②16<br>③11<br>④8</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①　FM波の占有周波数帯幅＝（最大周波数偏移＋最高周波数）×２</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問4</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>エミッタ接地トランジスタ増幅器のA級増幅の特徴で、正しいのは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①コレクター回路に流れるコレクタ電流のひずみが大きい<br>② B級およびC級増幅に比べ効率がいい<br>③ベース電流の半周期だけコレクタ電流が流れる<br>④入力の有無に関わらず、いつでもコレクター電流が流れている</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問5</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>A級増幅器の特徴について述べているのは、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①入力信号がないとき、出力側に電流が流れない<br>②交流入力信号のないときでも、常に出力側に電流が流れる<br>③A級以外の増幅よりも効率がいい<br>④出力側の変形ひずみが大きい</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問6</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>B級増幅器の特徴について述べているのは、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①交流入力信号がないときでも、常に出力側に電流が流れる<br>②高周波増幅のときのみ使用される<br>③A級増幅よりも効率がいい<br>④出力側の変形ひずみがない</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span><span class="bold-red">　C＞B＞Aの順</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問7</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述はあるトランジスタ増幅機の動作について述べたものである。正しいのはどれか。</strong><br><br>入力信号が正の半周期の時その一部の時間しかコレクタ電流が流れないので他の増幅方式のものに比べて最も効率がいいが、ひずみは最も大きい</p>



<p class="wp-block-paragraph">①A級増幅器<br>②AB級増幅器<br>③C級増幅器<br>④B級増幅器</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問8</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図はトランジスタ増幅器のV BEーIC特性曲線の一例である。特性のP点を動作点とする増幅方式の名称として、正しいのは次のうちどれか</strong></strong></p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="241" height="209" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-26.png" alt="" class="wp-image-5784"/></figure>



<p class="wp-block-paragraph">①A級増幅<br>②C級増幅<br>③B級増幅<br>④AB級増幅</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問9</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図はトランジスタ増幅器のV BEーIC特性曲線の一例である。特性のP点を動作点とする増幅方式の名称として、正しいのは次のうちどれか</strong></strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="302" height="238" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-24.png" alt="" class="wp-image-5782" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-24.png 302w, https://health-outdoor.com/wp-content/uploads/2026/05/image-24-300x236.png 300w" sizes="(max-width: 302px) 100vw, 302px" /></figure>



<p class="wp-block-paragraph">①A級増幅<br>②C級増幅<br>③B級増幅<br>④AB級増幅</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問10</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図はトランジスタ増幅器のV BEーIC特性曲線の一例である。特性のP点を動作点とする増幅方式の名称として、正しいのは次のうちどれか</strong></strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="217" height="234" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-33.png" alt="" class="wp-image-5791"/></figure>



<p class="wp-block-paragraph">①A級増幅<br>②C級増幅<br>③B級増幅<br>④AB級増幅</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問11</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>図は、ある復調回路の入力対出力特性である。これは次のどの電波を復調するのに用いられるか</strong></strong></p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="262" height="214" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-30.png" alt="" class="wp-image-5788"/></figure>



<p class="wp-block-paragraph">①A3E電波<br>②F3E電波<br>③J3E電波<br>④A1A電波</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問12</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>搬送波の振幅A、信号波の振幅をBとしたとき、振幅変調（A3E）波の変調度Mを表す次の式の□内に入れるべきものはどれか</strong>。M=□/A×100％</strong></p>



<p class="wp-block-paragraph"></p>



<p class="wp-block-paragraph">①A-B<br>②B<br>③B-A<br>④A+B</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問13</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>変調された信号の中から、音声信号を取り出す回路は次のうちどれか</strong></strong></p>



<p class="wp-block-paragraph"></p>



<p class="wp-block-paragraph">①検波回路<br>②変調回路<br>③増幅回路<br>④発振回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：<strong><strong>①</strong></strong></span><br><span class="bold-red"><strong><strong>音声信号取り出し→検波</strong></strong></span><br><span class="bold-red">振幅増幅→増幅<br>搬送波変化→変調<br>搬送波発生→発振</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問14</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>２つの図は、振幅変調波の周波数成分の分布を示している。これに対応する電波の型式の組み合わせで正しいのはどれか。ただし、点線は搬送波成分がないことを示す</strong></strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="441" height="128" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-25.png" alt="" class="wp-image-5783" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-25.png 441w, https://health-outdoor.com/wp-content/uploads/2026/05/image-25-300x87.png 300w" sizes="(max-width: 441px) 100vw, 441px" /></figure>



<p class="wp-block-paragraph">①A：A3E　B：J3E<br>②A：J3E　B：H3E<br>③A：J3E　B：A3E<br>④A：H3E　B：A3E</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問15</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>小さい振幅の信号を、より大きな振幅の信号にする回路は次のうちどれか</strong></p>



<p class="wp-block-paragraph">①発振回路<br>②増幅回路<br>③検波回路<br>④変調回路</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：</span><span class="bold-red">②</span>　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問16</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>搬送波の振幅を、音声等の電気信号によって変化させる働きは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①検波<br>②発振<br>③振幅変調<br>④周波数変調</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span>　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問17</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>直線検波回路の特性についての説明で、正しいのはどれか</strong></p>



<p class="wp-block-paragraph">①入力がある値を超えると出力は一定になる<br>②入力が大きくなるとひずみが多くなる<br>③比較的小さい入力電圧で動作する<br>④入力が大きいとき、入力対出力の関係が直線的である</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：</span><span class="bold-red">④</span>　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問18</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すトランジスタ増幅器においてベース・エミッタ間とエミッタ・コレクタ間に加える電源の極性の組み合わせで。正しいのはどれか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="273" height="202" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-27.png" alt="" class="wp-image-5785"/></figure>



<p class="wp-block-paragraph">①VBB　-│❚━　　VCC　-│❚│❚━<br>②VBB　-│❚━　　VCC　━❚│❚│─<br>③VBB　━❚ │-　　VCC　━❚│❚│─<br>④VBB　━❚ │-　　VCC　-│❚│❚━</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span>　</p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問19</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述は、振幅変調方式（A3E）と比べたときの周波数変調方式（F3E）の特徴について述べたものである。誤っているのはどれか</strong></p>



<p class="wp-block-paragraph">①音質がいい<br>②占有周波数帯域が狭い<br>③主に超短波帯以上で用いられる<br>④雑音に強い</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問20</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図は振幅が15Vの搬送波を単一正弦波の信号で振幅変調した変調波（A3E）の波形である。変調度が60％の時のAの値はいくらか</strong></p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="452" height="214" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-31.png" alt="" class="wp-image-5789" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-31.png 452w, https://health-outdoor.com/wp-content/uploads/2026/05/image-31-300x142.png 300w" sizes="(max-width: 452px) 100vw, 452px" /></figure>



<p class="wp-block-paragraph">①30<br>②24<br>③21<br>④18</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②　</span><span class="bold-red">変調度 = 振幅の増加分 ÷ 搬送波の振幅 × 100<br>60 = (A &#8211; 15) ÷ 15 × 100<br>A = 24V</span></p>



<p class="has-text-align-right wp-block-paragraph"></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問21</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>オシロスコープにより振幅変調波形を観測し、波形について測定した結果は図の通りであった。このとき変調度はいくらか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="392" height="192" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-32.png" alt="" class="wp-image-5790" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-32.png 392w, https://health-outdoor.com/wp-content/uploads/2026/05/image-32-300x147.png 300w" sizes="(max-width: 392px) 100vw, 392px" /></figure>



<p class="wp-block-paragraph">①30％<br>②60％<br>③40％<br>④50％</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④　変調度＝振幅の増分/無変調時×100</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問22</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図は振幅が一定の搬送波を信号波で増幅変調した変調波の波形である。この時の変調度はいくらか</strong>。</p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="452" height="214" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-29.png" alt="" class="wp-image-5787" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-29.png 452w, https://health-outdoor.com/wp-content/uploads/2026/05/image-29-300x142.png 300w" sizes="(max-width: 452px) 100vw, 452px" /></figure>



<p class="wp-block-paragraph">①30％<br>②15％<br>③20％<br>④50％</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④　変調度＝振幅の増分/無変調時×100</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問23</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>振幅が150Vの搬送波を振幅が90Vの信号波で振幅変調した場合の変調度はいくらか。</strong></p>



<p class="wp-block-paragraph">①40％<br>②66％<br>③60％<br>④16％</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③　M=B/A×100</span><br><span class="bold-red">90/150×100=60</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問24</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>音声信号で変調された電波で、占有周波数帯幅が通常最も狭いのは、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①SSB波<br>②FM波<br>③ATV波<br>④DSB波</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①　</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問25</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>エミッタ接地トランジスタ増幅機において、コレクタ電圧を一定としてベース電圧を3mAから4mAに変えたところ、コレクタ電流が180mAから240mAに増加した。このトランジスタ電流増幅率はいくらか</strong></p>



<p class="wp-block-paragraph">①50<br>②60<br>③40<br>④30</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②　増幅率＝コレクタ電流の増加分/ベース電流の増加分　</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問26</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>振幅が15Vの搬送波を、単一正弦波で振幅変調したとき、変調度が40%であった。その単一正弦波の振幅はいくらか</strong></p>



<p class="wp-block-paragraph">①24V<br>②21V<br>③9V<br>④6V</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④　</span><br><span class="bold-red">M=B（信号派の振幅の最大値）/A（搬送波の振幅の最大値）×100</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問27</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>SSB（J3E）電波の周波数成分は、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①上側波帯および下側波帯<br>②上側波帯又は下側波帯のいずれか１つ<br>③搬送波、上側波帯および下側波帯<br>④搬送波</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問28</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>DSB（A3E）電波の周波数成分は、次のうちどれか</strong></p>



<p class="wp-block-paragraph">①搬送波と下側波帯<br>②搬送波、上側波帯および下側波帯<br>③搬送波と上側波帯<br>④上側波帯</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問29</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>水晶発振器（回路）の周波数変動を少なくするための方法として、誤っているものは次のうちどれか</strong></p>



<p class="wp-block-paragraph">①発振機の次段に緩衝増幅器を設ける<br>②発振機の電源電圧変動小さくする<br>③発振機の周囲温度の変化を少なくする<br>④発振機と次段の結合を密にする</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問30</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>周波数fの信号入力と、周波数foの局部発振器の出力を周波数混合器で混合したとき、出力側に現れる周波数は次のうちどれか。ただし f＞fo とする。</strong></p>



<p class="wp-block-paragraph">①（f＋fo）/2<br>②f ± fo<br>③f/fo<br>④f × fo</p>



<hr class="wp-block-separator has-alpha-channel-opacity"/>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②<strong>　</strong></span></p>



<h2 class="wp-block-heading"><span id="toc2">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</span></h2>



<h3 class="wp-block-heading"><span id="toc3">法規関係の模擬問題はこちら</span></h3>



<p class="has-text-align-left wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1/" data-type="post" data-id="5843">・無線局の免許（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-2/" data-type="post" data-id="5365">・無線設備（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-3/" data-type="post" data-id="5374">・無線従事者（18問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-4/" data-type="post" data-id="5378">・運用（62問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-5/" data-type="post" data-id="5383">・監督（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-6/" data-type="post" data-id="5388">・業務書類（19問）</a></p>



<h3 class="wp-block-heading"><span id="toc4">無線工学の模擬問題はこちら</span></h3>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-1/" data-type="post" data-id="5755">・基礎工学（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-2/" data-type="post" data-id="5781">・電子回路（30問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-3/" data-type="post" data-id="5833">・送信機（40問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-4/" data-type="post" data-id="5823">・受信機（39問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-5/" data-type="post" data-id="5800">・電波障害（13問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-6/" data-type="post" data-id="5804">・電源（16問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-7/" data-type="post" data-id="5808">・アンテナ（26問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-8/" data-type="post" data-id="5818">・電波伝搬（33問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-9/" data-type="post" data-id="5793">・測定法（17問）</a></p>



<h2 class="wp-block-heading"><span id="toc5">試験対策をもっとやるなら</span></h2>



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		<title>これをやれば受かる！アマチュア無線4級の模擬問題集(工学⑨：測定法)</title>
		<link>https://health-outdoor.com/amateur-radio-test-1-9/</link>
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		<dc:creator><![CDATA[health.outdoor]]></dc:creator>
		<pubDate>Sun, 24 May 2026 10:42:09 +0000</pubDate>
				<category><![CDATA[アウトドア]]></category>
		<category><![CDATA[バックカントリー]]></category>
		<category><![CDATA[狩猟・猟銃]]></category>
		<guid isPermaLink="false">https://health-outdoor.com/?p=5793</guid>

					<description><![CDATA[このページでは、第4級アマチュア無線技士の無線工学から「測定法」に関する模擬問題を17問まとめています。電圧計・電流計の測定範囲、倍率器、分流器、ディップメーター、SWRメーター、通過電力計、テスターの使い方など、4アマ [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p class="wp-block-paragraph">このページでは、第4級アマチュア無線技士の無線工学から「測定法」に関する模擬問題を17問まとめています。<br>電圧計・電流計の測定範囲、倍率器、分流器、ディップメーター、SWRメーター、通過電力計、テスターの使い方など、4アマで出やすい内容を確認できます。<br>まずは答えを見ずに解き、間違えた問題だけ繰り返し復習してください。</p>




  <div id="toc" class="toc tnt-number toc-center tnt-number border-element"><input type="checkbox" class="toc-checkbox" id="toc-checkbox-20" checked><label class="toc-title" for="toc-checkbox-20">目次</label>
    <div class="toc-content">
    <ol class="toc-list open"><li><a href="#toc1" tabindex="0">模擬問題集（無線工学：測定法）全17問</a></li><li><a href="#toc2" tabindex="0">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</a><ol><li><a href="#toc3" tabindex="0">法規関係の模擬問題はこちら</a></li><li><a href="#toc4" tabindex="0">無線工学の模擬問題はこちら</a></li></ol></li><li><a href="#toc5" tabindex="0">試験対策をもっとやるなら</a></li></ol>
    </div>
  </div>

<h2 class="wp-block-heading"><span id="toc1">模擬問題集（無線工学：測定法）全17問</span></h2>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問１</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図の電圧計において破線で囲んだ電圧計VoにVoの内部抵抗rの3倍の値の直列抵抗器（倍率器）Rを接続すると測定範囲はVoの何倍になるか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="306" height="178" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-34.png" alt="" class="wp-image-5794" srcset="https://health-outdoor.com/wp-content/uploads/2026/05/image-34.png 306w, https://health-outdoor.com/wp-content/uploads/2026/05/image-34-300x175.png 300w" sizes="(max-width: 306px) 100vw, 306px" /></figure>



<p class="has-text-align-left wp-block-paragraph"><br><br>①5倍<br>②4倍<br>③2倍<br>④3倍</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②　</span><span class="bold-red">倍率器は電圧計に直列、分流器は電流計に並列に接続します。<br>内部抵抗のn倍なら、測定範囲は n+1 倍になります。</span></p>



<p class="has-text-align-right wp-block-paragraph"></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問２</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図に示すように、破線で囲んだ電流計AoにAoの内部抵抗の1/5の値の分流器Rを接続すると測定範囲はAoの何倍になるか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="220" height="206" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-35.png" alt="" class="wp-image-5795"/></figure>



<p class="wp-block-paragraph">①6倍<br>②4倍<br>③5倍<br>④2倍</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①　5＋１＝６</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問3</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図の電流計において分流器の抵抗Rをメーターの内部抵抗の1/4の値に選べば測定範囲は何倍になるか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="218" height="169" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-36.png" alt="" class="wp-image-5796"/></figure>



<p class="wp-block-paragraph">①4倍<br>②2倍<br>③6倍<br>④5倍</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④　4＋１＝５</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問4</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図の電流計において分流器の抵抗Rをメーターの内部抵抗の1/5の値に選べば測定範囲は何倍になるか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="218" height="169" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-36.png" alt="" class="wp-image-5796"/></figure>



<p class="wp-block-paragraph">①4倍<br>②2倍<br>③6倍<br>④5倍</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③　5＋１＝６</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問5</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>図の電圧計において、直列抵抗器（倍率器）の抵抗Rをメーターの内部抵抗の3倍の値に選べば測定範囲は何倍になるか</strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="288" height="124" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-37.png" alt="" class="wp-image-5797"/></figure>



<p class="wp-block-paragraph">①4倍<br>②2倍<br>③6倍<br>④5倍</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①　3＋１＝４</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問6</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の括弧内に入れるべき字句の組み合わせで、正しいのはどれか。</strong></p>



<p class="wp-block-paragraph">直列抵抗器（倍率器）は「A」の測定範囲を「B」のために用いられるもので計器に直列に接続して用いる</p>



<p class="wp-block-paragraph">①A電圧計　B狭める<br>②A電流計　B広げる<br>③A電圧計　B広げる<br>④A電流計　B狭める</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問7</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>次の記述の括弧内に入れるべき字句の組み合わせで、正しいのはどれか。</strong></p>



<p class="wp-block-paragraph">直列抵抗器（倍率器）は「A」の測定範囲を広げるために用いられるもので計器に「B」に接続して用いる</p>



<p class="wp-block-paragraph">①A電圧計　B並列<br>②A電流計　B直列<br>③A電圧計　B直列<br>④A電流計　B並列</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問8</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong>内部抵抗50kΩの電圧計の測定範囲を20倍にするには、直列抵抗器（倍率器）の抵抗をいくらにすればよいか</strong></p>



<p class="wp-block-paragraph">①25kΩ<br>②950kΩ<br>③2.5kΩ<br>④1000kΩ</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②　測定範囲を20倍にするには、内部抵抗50kΩの19倍の倍率器が必要です。50kΩ×19=950kΩです。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問9</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>ディップメーターの使用で誤っているのは次のうちどれか</strong></strong></p>



<p class="wp-block-paragraph">①アンテナと給電線の整合状態を調べるとき<br>②共振回路の共振周波数を測定するとき<br>③寄生発射の有無を調べるとき<br>④送信周波数を測定するとき</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問10</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>ディップメーターの使用ができないのはどれか</strong></strong></p>



<p class="wp-block-paragraph">①空中電線を測定するとき<br>②共振回路の共振周波数を測定するとき<br>③寄生発射の有無を調べるとき<br>④送信周波数を測定するとき</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問11</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>測定器を利用して行う下記の操作のうち定在波比測定器（SWRメーター）が使用されるのは次のうちどれか</strong></strong></p>



<p class="wp-block-paragraph">①アンテナと給電線の整合状態を調べるとき<br>②共振回路の共振周波数を測定するとき<br>③寄生発射の有無を調べるとき<br>④送信周波数を測定するとき</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問12</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>SWRメーターで測定できるのは次のうちどれか</strong></strong></p>



<p class="wp-block-paragraph">①電気抵抗<br>②周波数<br>③変調度<br>④定在波比</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：④</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問13</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>定在波比測定器（SWRメータ）を使用して、アンテナと同軸給電線の整合状態を正確に調べるとき、同軸給電線のどの部分に挿入したらよいか</strong></strong></p>



<p class="wp-block-paragraph">①アンテナと送信機との間の中央の部分<br>②送信機の出力端子に近い部分<br>③アンテナと送信機の間の任意の部分<br>④アンテナの給電線に近い部分</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問1４</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>端子電圧２Vの蓄電池２個を、図のように接続し、ab端子間の電圧を測定するには、最大目盛りが何ボルトの直流電圧計を用いればよいか。また電圧計の端子をどのように接続したらよいか。下記の組み合わせのうちから正しいものを選べ</strong></strong></p>



<figure class="wp-block-image aligncenter size-full"><img loading="lazy" decoding="async" width="267" height="53" src="https://health-outdoor.com/wp-content/uploads/2026/05/image-38.png" alt="" class="wp-image-5798"/></figure>



<p class="wp-block-paragraph">①最大目盛5V　接続方法＋端子をbに、-端子をaに繋ぐ<br>②最大目盛10V　接続方法＋端子をbに、-端子をaに繋ぐ<br>③最大目盛10V　接続方法＋端子をaに、-端子をbに繋ぐ<br>④最大目盛5V　接続方法＋端子をaに、-端子をbに繋ぐ</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：③</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問15</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>アンテナに供給される電力を通過電力計で測定したところ</strong>、進行<strong>電力95W、反射電力5Wであった。アンテナへ供給された電力はいくらか</strong></strong></p>



<p class="wp-block-paragraph">①19W<br>②90W<br>③95W<br>④100W</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②　アンテナへ実際に供給される電力は、進行電力から反射電力を引いて求めます。95W−5W=90Wです。</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問16</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>次の文の括弧内に入れるべき字句の組み合わせで正しいものはどれか</strong></strong></p>



<p class="wp-block-paragraph">ディップメーターによる回路の共振周波数の測定要領は次の通りである。<br>測定しようとする回路にディップメーターの発振コイルを「A」に結合する。次に可変コンデンサを調整して発振周波数を測定周波数に一致させるとディップメーターの発振出力が「B」されて、電流計の指示が「C」になる。この時の可変コンデンサのダイヤル目盛から、その回路の共振周波数が直読できる。</p>



<p class="wp-block-paragraph">①A疎　B吸収　C最小<br>②A疎　B相加　C最大<br>③A密　B吸収　C最大<br>④A密　B相加　C最小</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：①</span></p>



<div class="wp-block-cocoon-blocks-label-box-1 label-box block-box cocoon-block-label-box"><div class="label-box-label block-box-label box-label"><span class="label-box-label-text block-box-label-text box-label-text">問17</span></div><div class="label-box-content block-box-content box-content">
<p class="wp-block-paragraph"><strong><strong>一般アナログ方式の回路計（テスタ）で直流抵抗を測定するときの準備の手順で</strong></strong>、<strong><strong>正しいのは次のうちどれか</strong></strong></p>



<p class="wp-block-paragraph"></p>



<p class="wp-block-paragraph">①テスト棒を短絡する→0Ω調整する→測定レンジを選ぶ<br>②測定レンジを選ぶ→テスト棒を短絡する→0Ω調整する<br>③測定レンジを選ぶ→0Ω調整する→テスト棒を短絡する<br>④0Ω調整する→測定レンジを選ぶ→テスト棒を短絡する</p>
</div></div>



<p class="has-text-align-right wp-block-paragraph"><span class="bold-red">解：②</span></p>



<h2 class="wp-block-heading"><span id="toc2">他の分野も解くならこちら：4級アマチュア無線 過去問題集｜法規・無線工学の頻出433問まとめ</span></h2>



<h3 class="wp-block-heading"><span id="toc3">法規関係の模擬問題はこちら</span></h3>



<p class="has-text-align-left wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1/" data-type="post" data-id="5843">・無線局の免許（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-2/" data-type="post" data-id="5365">・無線設備（25問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-3/" data-type="post" data-id="5374">・無線従事者（18問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-4/" data-type="post" data-id="5378">・運用（62問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-5/" data-type="post" data-id="5383">・監督（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-6/" data-type="post" data-id="5388">・業務書類（19問）</a></p>



<h3 class="wp-block-heading"><span id="toc4">無線工学の模擬問題はこちら</span></h3>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-1/" data-type="post" data-id="5755">・基礎工学（35問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-2/" data-type="post" data-id="5781">・電子回路（30問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-3/" data-type="post" data-id="5833">・送信機（40問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-4/" data-type="post" data-id="5823">・受信機（39問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-5/" data-type="post" data-id="5800">・電波障害（13問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-6/" data-type="post" data-id="5804">・電源（16問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-7/" data-type="post" data-id="5808">・アンテナ（26問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-8/" data-type="post" data-id="5818">・電波伝搬（33問）</a></p>



<p class="wp-block-paragraph"><a href="https://health-outdoor.com/amateur-radio-test-1-9/" data-type="post" data-id="5793">・測定法（17問）</a></p>



<h2 class="wp-block-heading"><span id="toc5">試験対策をもっとやるなら</span></h2>



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