{"id":209053,"date":"2024-03-21T14:05:43","date_gmt":"2024-03-21T14:05:43","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e7%9c%9f%e7%a9%ba%e3%81%ae%e9%80%8f%e7%a3%81%e7%8e%87%ef%bc%88%ce%bc_0%ef%bc%89-%e6%a6%82%e8%a6%81%e3%81%a8%e9%87%8d%e8%a6%81%e6%80%a7\/"},"modified":"2024-05-17T15:06:29","modified_gmt":"2024-05-17T15:06:29","slug":"%e7%9c%9f%e7%a9%ba%e3%81%ae%e9%80%8f%e7%a3%81%e7%8e%87%ef%bc%88%ce%bc_0%ef%bc%89-%e6%a6%82%e8%a6%81%e3%81%a8%e9%87%8d%e8%a6%81%e6%80%a7","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e7%9c%9f%e7%a9%ba%e3%81%ae%e9%80%8f%e7%a3%81%e7%8e%87%ef%bc%88%ce%bc_0%ef%bc%89-%e6%a6%82%e8%a6%81%e3%81%a8%e9%87%8d%e8%a6%81%e6%80%a7\/","title":{"rendered":"\u771f\u7a7a\u306e\u900f\u78c1\u7387\uff08\u03bc_0\uff09| \u6982\u8981\u3068\u91cd\u8981\u6027"},"content":{"rendered":"<p class=\"sidekick\">\u771f\u7a7a\u306e\u900f\u78c1\u7387\uff08\u03bc_0\uff09\u306b\u95a2\u3059\u308b\u57fa\u672c\u7684\u306a\u6982\u8981\u3068\u305d\u306e\u91cd\u8981\u6027\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u30de\u30af\u30b9\u30a6\u30a7\u30eb\u65b9\u7a0b\u5f0f\u3084\u5b9f\u4e16\u754c\u306e\u5fdc\u7528\u3082\u542b\u3081\u305f\u6df1\u6398\u308a\u3002<\/p>\n<h2>\u771f\u7a7a\u306e\u900f\u78c1\u7387\uff08\u03bc_0\uff09| \u6982\u8981\u3068\u91cd\u8981\u6027<\/h2>\n<p>\u771f\u7a7a\u306e\u900f\u78c1\u7387\uff08\u03bc_0\uff09\u306f\u3001\u96fb\u6c17\u3068\u78c1\u6c17\u306e\u4e16\u754c\u3067\u975e\u5e38\u306b\u91cd\u8981\u306a\u5b9a\u6570\u306e\u4e00\u3064\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u771f\u7a7a\u306e\u900f\u78c1\u7387\u306e\u57fa\u672c\u7684\u306a\u6982\u8981\u3068\u305d\u306e\u91cd\u8981\u6027\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>\u771f\u7a7a\u306e\u900f\u78c1\u7387\uff08\u03bc_0\uff09\u3068\u306f\uff1f<\/h2>\n<p>\u771f\u7a7a\u306e\u900f\u78c1\u7387\uff08\u03bc_0\uff09\u306f\u3001\u771f\u7a7a\u4e2d\u306e\u78c1\u754c\u306e\u4f1d\u308f\u308a\u3084\u3059\u3055\u3092\u8868\u3059\u7269\u7406\u5b9a\u6570\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u03bc_0\u306f\u771f\u7a7a\u4e2d\u3067\u78c1\u5834\u3092\u4f5c\u308b\u80fd\u529b\u3092\u793a\u3057\u307e\u3059\u3002\u3053\u306e\u5b9a\u6570\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><em>\u03bc_0 = 4\u03c0 \u00d7 10^{-7} N\/A^2<\/em><\/p>\n<p>\u3053\u3053\u3067\u3001N\u306f\u30cb\u30e5\u30fc\u30c8\u30f3\u3001A\u306f\u30a2\u30f3\u30da\u30a2\u3067\u3059\u3002\u3053\u306e\u5b9a\u6570\u306f\u56fd\u969b\u5358\u4f4d\u7cfb\uff08SI\u5358\u4f4d\u7cfb\uff09\u306b\u304a\u3051\u308b\u6a19\u6e96\u7684\u306a\u5024\u3068\u3057\u3066\u3057\u3070\u3057\u3070\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u771f\u7a7a\u306e\u900f\u78c1\u7387\u306e\u6b74\u53f2\u7684\u80cc\u666f<\/h2>\n<p>\u771f\u7a7a\u306e\u900f\u78c1\u7387\u306e\u5b9a\u7fa9\u306f\u300119\u4e16\u7d00\u306e\u7269\u7406\u5b66\u8005\u30b8\u30a7\u30fc\u30e0\u30ba\u30fb\u30af\u30e9\u30fc\u30af\u30fb\u30de\u30af\u30b9\u30a6\u30a7\u30eb\u306e\u7814\u7a76\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u30de\u30af\u30b9\u30a6\u30a7\u30eb\u306f\u3001\u96fb\u78c1\u5834\u306e\u65b9\u7a0b\u5f0f\u3092\u767a\u5c55\u3055\u305b\u3001\u3053\u308c\u306b\u3088\u3063\u3066\u96fb\u6c17\u3068\u78c1\u6c17\u306e\u95a2\u4fc2\u3092\u660e\u78ba\u306b\u3057\u307e\u3057\u305f\u3002\u771f\u7a7a\u306e\u900f\u78c1\u7387\u306f\u3001\u30de\u30af\u30b9\u30a6\u30a7\u30eb\u65b9\u7a0b\u5f0f\u306e\u4e2d\u3067\u975e\u5e38\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n<h2>\u771f\u7a7a\u306e\u900f\u78c1\u7387\u306e\u6570\u5f0f\u306b\u304a\u3051\u308b\u5f79\u5272<\/h2>\n<p>\u771f\u7a7a\u306e\u900f\u78c1\u7387\u306f\u3001\u30de\u30af\u30b9\u30a6\u30a7\u30eb\u65b9\u7a0b\u5f0f\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30de\u30af\u30b9\u30a6\u30a7\u30eb\u65b9\u7a0b\u5f0f\u306e\u4e00\u3064\u306b\u73fe\u308c\u307e\u3059\u3002<\/p>\n<p>\\[<br \/>\n\\nabla \\times \\mathbf{B} = \\mu_0 \\left( \\mathbf{J} + \\epsilon_0 \\frac{\\partial \\mathbf{E}}{\\partial t} \\right)<br \/>\n\\]<\/p>\n<p>\u3053\u3053\u3067\u3001<em>\\mathbf{B}<\/em>\u306f\u78c1\u675f\u5bc6\u5ea6\u3001<em>\\mathbf{J}<\/em>\u306f\u96fb\u6d41\u5bc6\u5ea6\u3001<em>\\epsilon_0<\/em>\u306f\u771f\u7a7a\u306e\u8a98\u96fb\u7387\u3001<em>\\mathbf{E}<\/em>\u306f\u96fb\u5834\u3092\u793a\u3057\u307e\u3059\u3002\u771f\u7a7a\u306e\u900f\u78c1\u7387\uff08\u03bc_0\uff09\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u3067\u3001\u78c1\u5834\u3068\u96fb\u6d41\u306e\u95a2\u4fc2\u3001\u304a\u3088\u3073\u96fb\u5834\u306e\u6642\u9593\u5909\u5316\u306b\u5fdc\u3058\u305f\u78c1\u5834\u306e\u5909\u5316\u3092\u8a18\u8ff0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u5b9f\u4e16\u754c\u306b\u304a\u3051\u308b\u771f\u7a7a\u306e\u900f\u78c1\u7387\u306e\u91cd\u8981\u6027<\/h2>\n<p>\u771f\u7a7a\u306e\u900f\u78c1\u7387\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u5b9f\u4e16\u754c\u306e\u5fdc\u7528\u306b\u304a\u3044\u3066\u3082\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u96fb\u78c1\u6ce2\u306e\u4f1d\u642c\u3001\u96fb\u6c17\u56de\u8def\u8a2d\u8a08\u3001\u7121\u7dda\u901a\u4fe1\u306a\u3069\u3001\u591a\u5c90\u306b\u308f\u305f\u308a\u307e\u3059\u3002<\/p>\n<h3>\u96fb\u78c1\u6ce2\u306e\u4f1d\u642c<\/h3>\n<p>\u96fb\u78c1\u6ce2\uff08\u4f8b\u3048\u3070\u5149\u3084\u30e9\u30b8\u30aa\u6ce2\uff09\u306e\u4f1d\u308f\u308a\u65b9\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u771f\u7a7a\u306e\u900f\u78c1\u7387\u306e\u6982\u5ff5\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u96fb\u78c1\u6ce2\u306f\u5149\u901f\u3067\u4f1d\u308f\u308a\u3001\u5149\u901f\u306f\u771f\u7a7a\u306e\u900f\u78c1\u7387\u3068\u771f\u7a7a\u306e\u8a98\u96fb\u7387\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002\u96fb\u78c1\u6ce2\u306e\u6ce2\u9577\u3001\u5468\u6ce2\u6570\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u306a\u3069\u3092\u8a08\u7b97\u3059\u308b\u969b\u306b\u3082\u3001\u3053\u306e\u5b9a\u6570\u304c\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n<h3>\u96fb\u6c17\u56de\u8def\u8a2d\u8a08<\/h3>\n<p>\u96fb\u6c17\u56de\u8def\u3092\u8a2d\u8a08\u3059\u308b\u969b\u306b\u3082\u3001\u771f\u7a7a\u306e\u900f\u78c1\u7387\u306f\u8003\u616e\u3055\u308c\u307e\u3059\u3002\u78c1\u6c17\u30b3\u30a2\u3084\u8a98\u5c0e\u5668\uff08\u30a4\u30f3\u30c0\u30af\u30bf\uff09\u306e\u8a2d\u8a08\u3067\u306f\u3001\u78c1\u6c17\u6750\u6599\u306e\u900f\u78c1\u7387\u3068\u6bd4\u8f03\u3057\u3066\u3069\u308c\u304f\u3089\u3044\u5bb9\u6613\u306b\u78c1\u5834\u304c\u4f1d\u308f\u308b\u304b\u3092\u7406\u89e3\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u771f\u7a7a\u306e\u900f\u78c1\u7387\uff08\u03bc_0\uff09\u306f\u3001\u96fb\u6c17\u3068\u78c1\u6c17\u306b\u95a2\u9023\u3059\u308b\u591a\u304f\u306e\u7269\u7406\u73fe\u8c61\u306e\u7406\u89e3\u3068\u8a08\u7b97\u306b\u304a\u3044\u3066\u4e2d\u5fc3\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u30de\u30af\u30b9\u30a6\u30a7\u30eb\u65b9\u7a0b\u5f0f\u306e\u91cd\u8981\u306a\u90e8\u5206\u3068\u3057\u3066\u3001\u307e\u305f\u5b9f\u4e16\u754c\u3067\u306e\u96fb\u6c17\u56de\u8def\u8a2d\u8a08\u3084\u96fb\u78c1\u6ce2\u306e\u7814\u7a76\u306b\u304a\u3044\u3066\u4e0d\u53ef\u6b20\u306a\u5b9a\u6570\u3067\u3059\u3002\u3053\u306e\u5b9a\u6570\u306e\u7406\u89e3\u306f\u3001\u96fb\u78c1\u6c17\u5b66\u306e\u57fa\u790e\u3092\u7bc9\u304f\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u771f\u7a7a\u306e\u900f\u78c1\u7387\uff08\u03bc_0\uff09\u306b\u95a2\u3059\u308b\u57fa\u672c\u7684\u306a\u6982\u8981\u3068\u305d\u306e\u91cd\u8981\u6027\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u30de\u30af\u30b9\u30a6\u30a7\u30eb\u65b9\u7a0b\u5f0f\u3084\u5b9f\u4e16\u754c\u306e\u5fdc\u7528\u3082\u542b\u3081\u305f\u6df1\u6398\u308a\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-209053","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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