{"id":213778,"date":"2024-08-11T18:25:27","date_gmt":"2024-08-11T18:25:27","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/?p=213778"},"modified":"2024-08-11T18:25:27","modified_gmt":"2024-08-11T18:25:27","slug":"%e9%9b%bb%e5%a0%b4%e3%81%a8%e9%9b%bb%e4%bd%8d%e3%81%ae%e9%96%a2%e4%bf%82%e3%81%a8%e3%81%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e9%9b%bb%e5%a0%b4%e3%81%a8%e9%9b%bb%e4%bd%8d%e3%81%ae%e9%96%a2%e4%bf%82%e3%81%a8%e3%81%af%ef%bc%9f\/","title":{"rendered":"\u96fb\u5834\u3068\u96fb\u4f4d\u306e\u95a2\u4fc2\u3068\u306f\uff1f"},"content":{"rendered":"<p class=\"sidekick\">\u96fb\u5834\u3068\u96fb\u4f4d\u306e\u95a2\u4fc2\u3068\u306f\uff1f\u96fb\u5834\u3068\u96fb\u4f4d\u306e\u57fa\u672c\u6982\u5ff5\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u3001\u305d\u306e\u76f8\u4e92\u4f5c\u7528\u3068\u91cd\u8981\u6027\u3092\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002\u521d\u5fc3\u8005\u306b\u3082\u6700\u9069\u306a\u60c5\u5831\u3067\u3059\u3002<\/p>\n<h2>\u96fb\u5834\u3068\u96fb\u4f4d\u306e\u95a2\u4fc2\u3068\u306f\uff1f<\/h2>\n<p>\u96fb\u5834\u3068\u96fb\u4f4d\u306f\u3001\u96fb\u78c1\u6c17\u5b66\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u3067\u3042\u308a\u3001\u591a\u304f\u306e\u7269\u7406\u73fe\u8c61\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u91cd\u8981\u3067\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u5b9a\u7fa9\u3068\u3001\u305d\u306e\u9593\u306e\u95a2\u4fc2\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\u96fb\u5834 (Electric Field)<\/h2>\n<p>\u96fb\u5834\u306f\u3001\u7a7a\u9593\u306e\u4efb\u610f\u306e\u70b9\u3067\u3001\u96fb\u8377\u304c\u4ed6\u306e\u96fb\u8377\u306b\u53ca\u307c\u3059\u529b\u306e\u96c6\u307e\u308a\u3092\u793a\u3059\u3082\u306e\u3067\u3059\u3002\u4efb\u610f\u306e\u70b9\u3067\u96fb\u5834 \\(\\mathbf{E}\\) \u306f\u3001\u901a\u5e38\u30d9\u30af\u30c8\u30eb\u3067\u8868\u3055\u308c\u3001\u305d\u306e\u5358\u4f4d\u306f\u30cb\u30e5\u30fc\u30c8\u30f3\u6bce\u30af\u30fc\u30ed\u30f3 (N\/C) \u3067\u3059\u3002\u4ee5\u4e0b\u306b\u96fb\u5834\u306e\u5f0f\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n<p>\\[ \\mathbf{E} = \\frac{\\mathbf{F}}{q} \\]<\/p>\n<p>\u3053\u3053\u3067\u3001\\(\\mathbf{F}\\) \u306f\u96fb\u8377 \\(q\\) \u306b\u4f5c\u7528\u3059\u308b\u529b\u3067\u3059\u3002<\/p>\n<h2>\u96fb\u4f4d (Electric Potential)<\/h2>\n<p>\u96fb\u4f4d\u306f\u3001\u5358\u4f4d\u96fb\u8377\u304c\u7279\u5b9a\u306e\u70b9\u306b\u79fb\u52d5\u3059\u308b\u969b\u306b\u5fc5\u8981\u306a\u4ed5\u4e8b\u91cf\u3092\u6307\u3057\u307e\u3059\u3002\u96fb\u4f4d\u306f\u30b9\u30ab\u30e9\u30fc\u91cf\u3067\u3001\u5358\u4f4d\u306f\u30dc\u30eb\u30c8 (V) \u3067\u3059\u3002\u4e00\u822c\u7684\u306b\u3001\u3042\u308b\u70b9\u306b\u304a\u3051\u308b\u96fb\u4f4d \\(V\\) \u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p>\\[ V = \\frac{W}{q} \\]<\/p>\n<p>\u3053\u3053\u3067\u3001\\(W\\) \u306f\u96fb\u8377 \\(q\\) \u3092\u305d\u306e\u70b9\u307e\u3067\u79fb\u52d5\u3055\u305b\u308b\u969b\u306e\u4ed5\u4e8b\u3067\u3059\u3002<\/p>\n<h2>\u96fb\u5834\u3068\u96fb\u4f4d\u306e\u95a2\u4fc2<\/h2>\n<p>\u96fb\u5834\u3068\u96fb\u4f4d\u306e\u9593\u306b\u306f\u5bc6\u63a5\u306a\u95a2\u4fc2\u304c\u3042\u308a\u307e\u3059\u3002\u96fb\u4f4d\u306e\u52fe\u914d (\u7a7a\u9593\u7684\u5909\u5316) \u304c\u96fb\u5834\u3092\u5f62\u6210\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u6b21\u306e\u5f0f\u3067\u793a\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p>\\[ \\mathbf{E} = -\\nabla V \\]<\/p>\n<p>\u3053\u3053\u3067\u3001\\(\\nabla V\\) \u306f\u96fb\u4f4d \\(V\\) \u306e\u52fe\u914d\u3067\u3001\u96fb\u5834\u306f\u96fb\u4f4d\u306e\u5909\u5316\u306e\u65b9\u5411\u3068\u5927\u304d\u3055\u3092\u793a\u3057\u307e\u3059\u3002\u8ca0\u53f7\u306f\u3001\u96fb\u5834\u304c\u9ad8\u3044\u96fb\u4f4d\u304b\u3089\u4f4e\u3044\u96fb\u4f4d\u306b\u5411\u304b\u3046\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u4f8b\uff1a\u70b9\u96fb\u8377\u306e\u96fb\u5834\u3068\u96fb\u4f4d<\/h2>\n<p>\u70b9\u96fb\u8377 \\(Q\\) \u306b\u3088\u308b\u96fb\u5834\u3068\u96fb\u4f4d\u306f\u3001\u57fa\u672c\u7684\u306a\u4f8b\u3068\u3057\u3066\u3088\u304f\u6271\u308f\u308c\u307e\u3059\u3002\u70b9\u96fb\u8377\u304b\u3089\u8ddd\u96e2 \\(r\\) \u96e2\u308c\u305f\u70b9\u306b\u304a\u3051\u308b\u96fb\u5834 \\(\\mathbf{E}\\) 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