{"id":209395,"date":"2024-03-21T14:07:46","date_gmt":"2024-03-21T14:07:46","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e9%9b%bb%e5%a0%b4%e3%81%ae%e5%a2%83%e7%95%8c%e6%9d%a1%e4%bb%b6-%e6%a6%82%e8%a6%81%e3%81%a8%e5%9f%ba%e6%9c%ac%e8%a7%a3%e8%aa%ac\/"},"modified":"2024-05-17T15:11:59","modified_gmt":"2024-05-17T15:11:59","slug":"%e9%9b%bb%e5%a0%b4%e3%81%ae%e5%a2%83%e7%95%8c%e6%9d%a1%e4%bb%b6-%e6%a6%82%e8%a6%81%e3%81%a8%e5%9f%ba%e6%9c%ac%e8%a7%a3%e8%aa%ac","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e9%9b%bb%e5%a0%b4%e3%81%ae%e5%a2%83%e7%95%8c%e6%9d%a1%e4%bb%b6-%e6%a6%82%e8%a6%81%e3%81%a8%e5%9f%ba%e6%9c%ac%e8%a7%a3%e8%aa%ac\/","title":{"rendered":"\u96fb\u5834\u306e\u5883\u754c\u6761\u4ef6 | \u6982\u8981\u3068\u57fa\u672c\u89e3\u8aac"},"content":{"rendered":"<p class=\"sidekick\">\u96fb\u5834\u306e\u5883\u754c\u6761\u4ef6\u306b\u95a2\u3059\u308b\u57fa\u672c\u6982\u5ff5\u3068\u89e3\u8aac\u3002\u96fb\u5834\u306e\u9023\u7d9a\u6027\u3001\u5c0e\u4f53\u306e\u8868\u9762\u3067\u306e\u96fb\u5834\u3001\u7570\u306a\u308b\u5a92\u8cea\u9593\u306e\u632f\u308b\u821e\u3044\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>\u96fb\u5834\u306e\u5883\u754c\u6761\u4ef6 | \u6982\u8981\u3068\u57fa\u672c\u89e3\u8aac<\/h2>\n<p>\u96fb\u5834\uff08\u3067\u3093\u3058\u3087\u3046\uff09\u306e\u5883\u754c\u6761\u4ef6\u306f\u3001\u96fb\u6c17\u3068\u78c1\u6c17\u306e\u73fe\u8c61\u3092\u8a18\u8ff0\u3059\u308b\u4e0a\u3067\u6975\u3081\u3066\u91cd\u8981\u306a\u6982\u5ff5\u3067\u3059\u3002\u7279\u306b\u3001\u96fb\u5834\u306e\u632f\u308b\u821e\u3044\u3092\u7406\u89e3\u3057\u3001\u69d8\u3005\u306a\u7269\u7406\u73fe\u8c61\u3092\u89e3\u6790\u3059\u308b\u305f\u3081\u306e\u57fa\u672c\u7684\u306a\u624b\u6bb5\u3068\u3057\u3066\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u96fb\u5834\u306e\u5883\u754c\u6761\u4ef6\u306b\u3064\u3044\u3066\u7c21\u5358\u306b\u8aac\u660e\u3057\u3001\u305d\u306e\u57fa\u672c\u7684\u306a\u8003\u3048\u65b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h2>\u96fb\u5834\u3068\u306f\uff1f<\/h2>\n<p>\u96fb\u5834\u3068\u306f\u3001\u96fb\u8377\uff08\u3067\u3093\u304b\uff09\u304c\u5468\u56f2\u306b\u53ca\u307c\u3059\u529b\u306e\u3053\u3068\u3067\u3042\u308a\u3001\u96fb\u6c17\u529b\u7dda\u306e\u5f62\u3067\u8996\u899a\u5316\u3055\u308c\u307e\u3059\u3002\u96fb\u5834\u306f\u3001\u30af\u30fc\u30ed\u30f3\u306e\u6cd5\u5247\u306b\u5f93\u3044\u3001\u96fb\u8377\u306e\u91cf\u3068\u8ddd\u96e2\u306b\u3088\u3063\u3066\u6c7a\u307e\u308a\u307e\u3059\u3002\u96fb\u5834 <em>E<\/em> \u306f\u6b21\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p>$$ \\mathbf{E} = \\frac{\\mathbf{F}}{q} $$<\/p>\n<p>\u3053\u3053\u3067\u3001<em>F<\/em> \u306f\u529b\u3001<em>q<\/em> \u306f\u96fb\u8377\u3067\u3059\u3002\u3053\u306e\u65b9\u7a0b\u5f0f\u306f\u3001\u5358\u4f4d\u96fb\u8377\u3042\u305f\u308a\u306e\u96fb\u529b\u3092\u8868\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u96fb\u5834\u306e\u5883\u754c\u6761\u4ef6\u3068\u306f\uff1f<\/h2>\n<p>\u96fb\u5834\u306e\u5883\u754c\u6761\u4ef6\u306f\u3001\u7269\u4f53\u306e\u8868\u9762\u3084\u4e8c\u3064\u306e\u7570\u306a\u308b\u5a92\u8cea\uff08\u3070\u3044\u3057\u3064\uff09\u306e\u9593\u3067\u96fb\u5834\u304c\u3069\u306e\u3088\u3046\u306b\u632f\u308b\u821e\u3046\u304b\u3092\u6c7a\u3081\u308b\u898f\u5247\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u6761\u4ef6\u306f\u3001\u96fb\u6c17\u529b\u7dda\u306e\u9023\u7d9a\u6027\u3084\u96fb\u78c1\u6c17\u5b66\u306e\u6cd5\u5247\u304b\u3089\u5c0e\u304b\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u4ee3\u8868\u7684\u306a\u5883\u754c\u6761\u4ef6\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>\u96fb\u5834\u306e\u9023\u7d9a\u6027<\/h2>\n<p>\u96fb\u5834\u306e\u9023\u7d9a\u6027\u306f\u3001\u30ac\u30a6\u30b9\u306e\u6cd5\u5247\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u30ac\u30a6\u30b9\u306e\u6cd5\u5247\u306f\u3001\u4efb\u610f\u306e\u9589\u3058\u305f\u8868\u9762\u4e0a\u306e\u96fb\u5834\u306e\u30d5\u30e9\u30c3\u30af\u30b9\uff08\u6d41\u675f\uff09\u304c\u3001\u305d\u306e\u8868\u9762\u5185\u90e8\u306e\u5168\u96fb\u8377\u306b\u6bd4\u4f8b\u3059\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u6570\u5b66\u7684\u306b\u306f\u6b21\u306e\u3088\u3046\u306b\u8868\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p>$$ \\oint_{\\partial V} \\mathbf{E} \\cdot d\\mathbf{A} = \\frac{Q_{\\text{enc}}}{\\epsilon_0} $$<\/p>\n<p>\u3053\u3053\u3067\u3001$\\partial V$ \u306f\u9589\u3058\u305f\u8868\u9762\u3001<em>Q<sub>enc<\/sub><\/em> \u306f\u8868\u9762\u5185\u306e\u96fb\u8377\u3001$\\epsilon_0$ \u306f\u771f\u7a7a\u306e\u8a98\u96fb\u7387\u3067\u3059\u3002\u3053\u306e\u6cd5\u5247\u304b\u3089\u3001\u8868\u9762\u4e0a\u306e\u96fb\u8377\u304c\u30bc\u30ed\u3067\u3042\u308b\u9650\u308a\u3001\u5883\u754c\u3067\u306e\u6cd5\u7dda\u65b9\u5411\u306e\u96fb\u5834\u6210\u5206\u306f\u5909\u308f\u3089\u306a\u3044\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<h2>\u5c0e\u4f53\u306e\u8868\u9762\u3067\u306e\u96fb\u5834<\/h2>\n<p>\u5c0e\u4f53\u306e\u8868\u9762\u3067\u306f\u3001\u5185\u90e8\u306e\u96fb\u5834\u304c\u30bc\u30ed\u306b\u306a\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u5c0e\u4f53\u8868\u9762\u306b\u96fb\u8377\u304c\u3042\u308b\u5834\u5408\u3001\u96fb\u5834\u306f\u8868\u9762\u306b\u5782\u76f4\u306b\u7acb\u3061\u4e0a\u304c\u308a\u307e\u3059\u3002\u5185\u5074\u306e\u96fb\u5834\u304c\u30bc\u30ed\u3067\u3042\u308b\u305f\u3081\u3001\u8868\u9762\u76f4\u524d\u304a\u3088\u3073\u76f4\u5f8c\u306e\u96fb\u5834\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u95a2\u4fc2\u304c\u6210\u308a\u7acb\u3061\u307e\u3059\uff1a<\/p>\n<p>$$ E_{\\text{out}} &#8211; E_{\\text{in}} = \\frac{\\sigma}{\\epsilon_0} $$<\/p>\n<p>\u3053\u3053\u3067\u3001<em>E<sub>out<\/sub><\/em> \u306f\u8868\u9762\u306e\u5916\u5074\u306e\u96fb\u5834\u3001<em>E<sub>in<\/sub><\/em> \u306f\u8868\u9762\u306e\u5185\u5074\u306e\u96fb\u5834\u3001$\\sigma$ \u306f\u8868\u9762\u306e\u9762\u96fb\u8377\u5bc6\u5ea6\u3067\u3059\u3002<\/p>\n<h2>\u7570\u306a\u308b\u5a92\u8cea\u9593\u306e\u5883\u754c<\/h2>\n<p>\u7570\u306a\u308b\u5a92\u8cea\u9593\u3067\u306f\u3001\u96fb\u5834\u306e\u5883\u754c\u6761\u4ef6\u306f\u3055\u3089\u306b\u8907\u96d1\u306b\u306a\u308a\u307e\u3059\u3002\u96fb\u5834\u306e\u6cd5\u7dda\u6210\u5206\u3068\u63a5\u7dda\u6210\u5206\u304c\u305d\u308c\u305e\u308c\u7570\u306a\u3063\u305f\u30eb\u30fc\u30eb\u306b\u5f93\u3044\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\uff1a<\/p>\n<ul>\n<li>\u6cd5\u7dda\u6210\u5206\uff1a<\/li>\n<p>$$ \\epsilon_1 E_{1n} = \\epsilon_2 E_{2n} + \\frac{\\sigma}{\\epsilon_0} $$<\/p>\n<li>\u63a5\u7dda\u6210\u5206\uff1a<\/li>\n<p>$$ \\mathbf{E}_{1t} = \\mathbf{E}_{2t} $$<\/p>\n<\/ul>\n<p>\u3053\u3053\u3067\u3001$\\epsilon_1$ \u3068 $\\epsilon_2$ \u306f\u305d\u308c\u305e\u308c\u5a92\u8cea1\u3068\u5a92\u8cea2\u306e\u8a98\u96fb\u7387\u3001<em>E<sub>1n<\/sub><\/em> \u3068<em>E<sub>2n<\/sub><\/em> \u306f\u6cd5\u7dda\u65b9\u5411\u306e\u96fb\u5834\u6210\u5206\u3001<em>E<sub>1t<\/sub><\/em> \u3068<em>E<sub>2t<\/sub><\/em> \u306f\u63a5\u7dda\u65b9\u5411\u306e\u96fb\u5834\u6210\u5206\u3001$\\sigma$ \u306f\u5883\u754c\u9762\u306e\u9762\u96fb\u8377\u5bc6\u5ea6\u3067\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u96fb\u5834\u306e\u5883\u754c\u6761\u4ef6\u306f\u3001\u7269\u7406\u73fe\u8c61\u3092\u7406\u89e3\u3057\u3001\u96fb\u6c17\u7684\u306a\u8a2d\u8a08\u3084\u89e3\u6790\u3092\u884c\u3046\u4e0a\u3067\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u30ac\u30a6\u30b9\u306e\u6cd5\u5247\u3084\u5c0e\u4f53\u306e\u7279\u6027\u306b\u57fa\u3065\u3044\u3066\u3001\u3053\u308c\u3089\u306e\u6761\u4ef6\u304c\u3069\u306e\u3088\u3046\u306b\u6210\u308a\u7acb\u3064\u304b\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8907\u96d1\u306a\u554f\u984c\u306b\u3082\u5bfe\u5fdc\u3059\u308b\u57fa\u790e\u529b\u3092\u990a\u3048\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u77e5\u8b58\u3092\u57fa\u306b\u3001\u96fb\u6c17\u3068\u78c1\u6c17\u306e\u4e16\u754c\u3092\u6df1\u304f\u63a2\u6c42\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u96fb\u5834\u306e\u5883\u754c\u6761\u4ef6\u306b\u95a2\u3059\u308b\u57fa\u672c\u6982\u5ff5\u3068\u89e3\u8aac\u3002\u96fb\u5834\u306e\u9023\u7d9a\u6027\u3001\u5c0e\u4f53\u306e\u8868\u9762\u3067\u306e\u96fb\u5834\u3001\u7570\u306a\u308b\u5a92\u8cea\u9593\u306e\u632f\u308b\u821e\u3044\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[96],"tags":[97],"class_list":["post-209395","post","type-post","status-publish","format-standard","hentry","category-96","tag-97","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- 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