{"id":70695,"date":"2023-11-13T07:52:34","date_gmt":"2023-11-13T07:52:34","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e9%9b%bb%e7%a3%81%e6%b3%a2%e6%96%b9%e7%a8%8b%e5%bc%8f%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e6%a9%9f%e8%83%bd%e3%81%97%e3%81%be%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2023-11-13T11:22:58","modified_gmt":"2023-11-13T11:22:58","slug":"%e9%9b%bb%e7%a3%81%e6%b3%a2%e6%96%b9%e7%a8%8b%e5%bc%8f%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e6%a9%9f%e8%83%bd%e3%81%97%e3%81%be%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e9%9b%bb%e7%a3%81%e6%b3%a2%e6%96%b9%e7%a8%8b%e5%bc%8f%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e6%a9%9f%e8%83%bd%e3%81%97%e3%81%be%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306f\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3057\u307e\u3059\u304b\uff1f"},"content":{"rendered":"

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306e\u57fa\u672c\u3068\u3001\u305d\u306e\u5c0e\u51fa\u3084\u5fdc\u7528\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u30de\u30c3\u30af\u30b9\u30a6\u30a7\u30eb\u306e\u65b9\u7a0b\u5f0f\u304b\u3089\u96fb\u78c1\u6ce2\u306e\u4f1d\u64ad\u3092\u7406\u89e3\u3059\u308b\u91cd\u8981\u306a\u77e5\u8b58\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n

\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u3068\u306f<\/h2>\n

\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306f\u3001\u96fb\u6c17\u3068\u78c1\u6c17\u306e\u73fe\u8c61\u3092\u8a18\u8ff0\u3059\u308b\u305f\u3081\u306e\u6570\u5b66\u7684\u306a\u65b9\u7a0b\u5f0f\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30de\u30c3\u30af\u30b9\u30a6\u30a7\u30eb\u306e\u65b9\u7a0b\u5f0f\u304b\u3089\u5c0e\u51fa\u3055\u308c\u3001\u5149\u3084\u30e9\u30b8\u30aa\u6ce2\u306a\u3069\u306e\u96fb\u78c1\u6ce2\u306e\u4f1d\u64ad\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u30c4\u30fc\u30eb\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u30de\u30c3\u30af\u30b9\u30a6\u30a7\u30eb\u306e\u65b9\u7a0b\u5f0f<\/h2>\n

\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u307e\u305a\u30de\u30c3\u30af\u30b9\u30a6\u30a7\u30eb\u306e\u65b9\u7a0b\u5f0f\u306b\u3064\u3044\u3066\u77e5\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30de\u30c3\u30af\u30b9\u30a6\u30a7\u30eb\u306e\u65b9\u7a0b\u5f0f\u306f\u3001\u96fb\u5834\uff08E\uff09\u3068\u78c1\u5834\uff08B\uff09\u306e\u95a2\u4fc2\u30924\u3064\u306e\u65b9\u7a0b\u5f0f\u3067\u8868\u3057\u305f\u3082\u306e\u3067\u3059\u3002\u3053\u308c\u3089\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n

    \n
  1. \u30ac\u30a6\u30b9\u306e\u6cd5\u5247\uff1a\u2207\u30fbE = \u03c1\/\u03b50<\/sub><\/li>\n
  2. \u30ac\u30a6\u30b9\u306e\u78c1\u5834\u306e\u6cd5\u5247\uff1a\u2207\u30fbB = 0<\/li>\n
  3. \u30d5\u30a1\u30e9\u30c7\u30fc\u306e\u6cd5\u5247\uff1a\u2207\u00d7E = -\u2202B\/\u2202t<\/li>\n
  4. \u30a2\u30f3\u30da\u30fc\u30eb\u306e\u6cd5\u5247\uff1a\u2207\u00d7B = \u03bc0<\/sub>J + \u03bc0<\/sub>\u03b50<\/sub>\u2202E\/\u2202t<\/li>\n<\/ol>\n

    \u3053\u3053\u3067\u3001\u03c1\u306f\u96fb\u8377\u5bc6\u5ea6\u3001\u03b50<\/sub>\u306f\u771f\u7a7a\u306e\u8a98\u96fb\u7387\u3001\u03bc0<\/sub>\u306f\u771f\u7a7a\u306e\u900f\u78c1\u7387\u3001J\u306f\u96fb\u6d41\u5bc6\u5ea6\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n

    \u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306e\u5c0e\u51fa<\/h2>\n

    \u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306f\u3001\u30de\u30c3\u30af\u30b9\u30a6\u30a7\u30eb\u306e\u65b9\u7a0b\u5f0f\u304b\u3089\u5c0e\u51fa\u3055\u308c\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u30a2\u30f3\u30da\u30fc\u30eb\u306e\u6cd5\u5247\u3068\u30d5\u30a1\u30e9\u30c7\u30fc\u306e\u6cd5\u5247\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u7a7a\u9593\u3068\u6642\u9593\u306b\u95a2\u3059\u308b\u96fb\u5834\u3068\u78c1\u5834\u306e\u5909\u5316\u3092\u8a18\u8ff0\u3059\u308b\u65b9\u7a0b\u5f0f\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

    \u307e\u305a\u3001\u30d5\u30a1\u30e9\u30c7\u30fc\u306e\u6cd5\u5247\u306e\u4e21\u8fba\u306e\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u53d6\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u95a2\u4fc2\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n

    \u2207\u00d7(\u2207\u00d7E) = -\u2207\u00d7(\u2202B\/\u2202t)<\/p>\n

    \u540c\u69d8\u306b\u3001\u30a2\u30f3\u30da\u30fc\u30eb\u306e\u6cd5\u5247\u306e\u4e21\u8fba\u306e\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u53d6\u308a\u3001\u7279\u306b\u81ea\u7531\u96fb\u6d41\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u3092\u8003\u3048\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u5f0f\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n

    \u2207\u00d7(\u2207\u00d7B) = \u03bc0<\/sub>\u03b50<\/sub>\u2207\u00d7(\u2202E\/\u2202t)<\/p>\n

    \u3053\u308c\u3089\u306e\u5f0f\u3092\u7528\u3044\u3066\u3001\u96fb\u5834E\u3068\u78c1\u5834B\u306e\u6642\u9593\u5909\u5316\u3092\u8868\u3059\u4e8c\u968e\u306e\u504f\u5fae\u5206\u65b9\u7a0b\u5f0f\u3001\u3059\u306a\u308f\u3061\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u3092\u5c0e\u51fa\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

    \u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306e\u5177\u4f53\u5f62<\/h2>\n

    \u4e0a\u8a18\u306e\u95a2\u4fc2\u5f0f\u3092\u7528\u3044\u3066\u3001\u96fb\u5834E\u3068\u78c1\u5834B\u306b\u95a2\u3059\u308b\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u3092\u5177\u4f53\u7684\u306b\u5c0e\u304f\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

      \n
    1. \u96fb\u5834\u306b\u95a2\u3059\u308b\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\uff1a\u2207\u00b2E – \u03bc0<\/sub>\u03b50<\/sub>\u2202\u00b2E\/\u2202t\u00b2 = 0<\/li>\n
    2. \u78c1\u5834\u306b\u95a2\u3059\u308b\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\uff1a\u2207\u00b2B – \u03bc0<\/sub>\u03b50<\/sub>\u2202\u00b2B\/\u2202t\u00b2 = 0<\/li>\n<\/ol>\n

      \u3053\u308c\u3089\u306e\u65b9\u7a0b\u5f0f\u306f\u3001\u7a7a\u9593\u4e2d\u3092\u4f1d\u64ad\u3059\u308b\u96fb\u78c1\u6ce2\u306e\u632f\u308b\u821e\u3044\u3092\u8a18\u8ff0\u3057\u3066\u3044\u307e\u3059\u3002\u96fb\u5834\u3068\u78c1\u5834\u306f\u76f4\u4ea4\u3057\u3001\u6ce2\u306e\u9032\u884c\u65b9\u5411\u306b\u6cbf\u3063\u3066\u5909\u5316\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u3053\u308c\u3089\u306e\u65b9\u7a0b\u5f0f\u304b\u3089\u3001\u96fb\u78c1\u6ce2\u306e\u901f\u5ea6\u304c\u5149\u901fc\u3067\u3042\u308b\u3053\u3068\u3082\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001c\u00b2 = 1\/(\u03bc0<\/sub>\u03b50<\/sub>)\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

      \u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306e\u91cd\u8981\u6027<\/h2>\n

      \u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306f\u3001\u96fb\u78c1\u6ce2\u304c\u3069\u306e\u3088\u3046\u306b\u7a7a\u9593\u3092\u4f1d\u64ad\u3059\u308b\u304b\u3092\u7406\u8ad6\u7684\u306b\u7406\u89e3\u3059\u308b\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u3001\u30e9\u30b8\u30aa\u6ce2\u3001\u30de\u30a4\u30af\u30ed\u6ce2\u3001\u53ef\u8996\u5149\u7dda\u3001X\u7dda\u306a\u3069\u3001\u69d8\u3005\u306a\u7a2e\u985e\u306e\u96fb\u78c1\u6ce2\u306e\u6027\u8cea\u3084\u632f\u308b\u821e\u3044\u3092\u4e88\u6e2c\u3057\u3001\u5fdc\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u901a\u4fe1\u3001\u533b\u7642\u3001\u79d1\u5b66\u7814\u7a76\u306a\u3069\u3001\u79c1\u305f\u3061\u306e\u65e5\u5e38\u751f\u6d3b\u3084\u7523\u696d\u306b\u304a\u3051\u308b\u591a\u304f\u306e\u6280\u8853\u304c\u3001\u3053\u306e\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306e\u7406\u89e3\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n

      \u307e\u3068\u3081<\/h2>\n

      \u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306f\u3001\u30de\u30c3\u30af\u30b9\u30a6\u30a7\u30eb\u306e\u65b9\u7a0b\u5f0f\u304b\u3089\u5c0e\u51fa\u3055\u308c\u308b\u65b9\u7a0b\u5f0f\u3067\u3001\u96fb\u5834\u3068\u78c1\u5834\u306e\u7a7a\u9593\u7684\u304a\u3088\u3073\u6642\u9593\u7684\u306a\u5909\u5316\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002\u3053\u306e\u65b9\u7a0b\u5f0f\u3092\u901a\u3057\u3066\u3001\u96fb\u78c1\u6ce2\u306e\u4f1d\u64ad\u306e\u4ed5\u7d44\u307f\u3084\u3001\u69d8\u3005\u306a\u7269\u7406\u73fe\u8c61\u3092\u7406\u8ad6\u7684\u306b\u89e3\u660e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7121\u7dda\u901a\u4fe1\u304b\u3089\u533b\u7642\u6280\u8853\u307e\u3067\u3001\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306f\u73fe\u4ee3\u793e\u4f1a\u306e\u591a\u304f\u306e\u5206\u91ce\u306b\u304a\u3044\u3066\u3001\u305d\u306e\u91cd\u8981\u6027\u3092\u767a\u63ee\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

      \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306e\u57fa\u672c\u3068\u3001\u305d\u306e\u5c0e\u51fa\u3084\u5fdc\u7528\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u30de\u30c3\u30af\u30b9\u30a6\u30a7\u30eb\u306e\u65b9\u7a0b\u5f0f\u304b\u3089\u96fb\u78c1\u6ce2\u306e\u4f1d\u64ad\u3092\u7406\u89e3\u3059\u308b\u91cd\u8981\u306a\u77e5\u8b58\u3092\u7d39\u4ecb\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":[63],"tags":[64],"class_list":["post-70695","post","type-post","status-publish","format-standard","hentry","category-63","tag-64","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"\n\u96fb\u78c1\u6ce2\u65b9\u7a0b\u5f0f\u306f\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3057\u307e\u3059\u304b\uff1f<\/title>\n<meta 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