{"id":213845,"date":"2024-10-07T06:54:18","date_gmt":"2024-10-07T06:54:18","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/?p=213845"},"modified":"2024-10-07T06:54:18","modified_gmt":"2024-10-07T06:54:18","slug":"%e4%ba%a4%e6%b5%81%e5%9b%9e%e8%b7%af%e3%81%ae%e4%bd%8d%e7%9b%b8%e8%a7%92%e3%81%a8%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e4%ba%a4%e6%b5%81%e5%9b%9e%e8%b7%af%e3%81%ae%e4%bd%8d%e7%9b%b8%e8%a7%92%e3%81%a8%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"\u4ea4\u6d41\u56de\u8def\u306e\u4f4d\u76f8\u89d2\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p class=\"sidekick\">\u4ea4\u6d41\u56de\u8def\u306e\u4f4d\u76f8\u89d2\u3068\u306f\u3001\u96fb\u5727\u3068\u96fb\u6d41\u306e\u9593\u306e\u6642\u9593\u9045\u308c\u3092\u793a\u3059\u89d2\u5ea6\u3067\u3001\u56de\u8def\u306e\u6027\u80fd\u3084\u96fb\u529b\u4f1d\u9001\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n<h2>\u4ea4\u6d41\u56de\u8def\u306e\u4f4d\u76f8\u89d2\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h2>\n<p>\u4ea4\u6d41\u56de\u8def\uff08AC\u56de\u8def\uff09\u306f\u3001\u6642\u9593\u3068\u3068\u3082\u306b\u96fb\u5727\u3084\u96fb\u6d41\u304c\u6b63\u5f26\u6ce2\u306e\u5f62\u3067\u5909\u52d5\u3059\u308b\u56de\u8def\u3092\u6307\u3057\u307e\u3059\u3002\u96fb\u5727\u3068\u96fb\u6d41\u306e\u9593\u306b\u306f\u3001\u3057\u3070\u3057\u3070\u4f4d\u76f8\u5dee\u3068\u547c\u3070\u308c\u308b\u6642\u9593\u7684\u306a\u305a\u308c\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u306e\u4f4d\u76f8\u5dee\u3092\u89d2\u5ea6\u3067\u8868\u3057\u305f\u3082\u306e\u304c\u300c\u4f4d\u76f8\u89d2\u300d\u3067\u3059\u3002\u4f4d\u76f8\u89d2\u306f\u3001\u96fb\u5727\u3068\u96fb\u6d41\u306e\u6ce2\u5f62\u304c\u3069\u308c\u3060\u3051\u305a\u308c\u3066\u3044\u308b\u304b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<h2>\u4f4d\u76f8\u89d2\u306e\u5b9a\u7fa9<\/h2>\n<p>\u4f4d\u76f8\u89d2\u306f\u901a\u5e38\u3001\u30ae\u30ea\u30b7\u30e3\u6587\u5b57\u306e\u30d5\u30a1\u30a4\uff08\u03c6\uff09\u3067\u8868\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u89d2\u5ea6\u306f\u3001\u96fb\u5727\u3068\u96fb\u6d41\u304c\u540c\u3058\u6642\u70b9\u3067\u6700\u5927\u5024\u307e\u305f\u306f\u6700\u5c0f\u5024\u306b\u9054\u3059\u308b\u6642\u70b9\u306e\u305a\u308c\u3092\u89d2\u5ea6\u3068\u3057\u3066\u8868\u73fe\u3057\u305f\u3082\u306e\u3067\u3059\u3002\u4f4d\u76f8\u89d2\u306f\u5ea6\uff08\u00b0\uff09\u307e\u305f\u306f\u30e9\u30b8\u30a2\u30f3\uff08rad\uff09\u3067\u6e2c\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u4f4d\u76f8\u89d2\u306e\u8a08\u7b97\u65b9\u6cd5<\/h2>\n<p>\u5358\u7d14\u306a\u4ea4\u6d41\u56de\u8def\u3067\u306f\u3001\u96fb\u5727\u3068\u96fb\u6d41\u306e\u9593\u306e\u4f4d\u76f8\u89d2 \u03c6 \u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3055\u308c\u307e\u3059\uff1a<\/p>\n<ul>\n<li><strong>\u62b5\u6297\u306e\u307f\u306e\u56de\u8def<\/strong>\uff1a\u96fb\u5727\u3068\u96fb\u6d41\u306f\u540c\u4f4d\u76f8\uff08\u4f4d\u76f8\u89d2 \u03c6 = 0\u00b0\uff09\u3002<\/li>\n<li><strong>\u30a4\u30f3\u30c0\u30af\u30bf\uff08\u30b3\u30a4\u30eb\uff09\u306e\u307f\u306e\u56de\u8def<\/strong>\uff1a\u96fb\u6d41\u306f\u96fb\u5727\u3088\u308a\u308290\u00b0\u9045\u308c\u308b\uff08\u4f4d\u76f8\u89d2 \u03c6 = -90\u00b0\uff09\u3002<\/li>\n<li><strong>\u30ad\u30e3\u30d1\u30b7\u30bf\uff08\u30b3\u30f3\u30c7\u30f3\u30b5\uff09\u306e\u307f\u306e\u56de\u8def<\/strong>\uff1a\u96fb\u6d41\u306f\u96fb\u5727\u3088\u308a\u308290\u00b0\u9032\u3080\uff08\u4f4d\u76f8\u89d2 \u03c6 = +90\u00b0\uff09\u3002<\/li>\n<\/ul>\n<h2>\u5b9f\u969b\u306e\u4ea4\u6d41\u56de\u8def\u3067\u306e\u4f4d\u76f8\u89d2<\/h2>\n<p>\u73fe\u5b9f\u306e\u56de\u8def\u3067\u306f\u3001\u62b5\u6297\u3001\u30a4\u30f3\u30c0\u30af\u30bf\u30f3\u30b9\u3001\u304a\u3088\u3073\u30ad\u30e3\u30d1\u30b7\u30bf\u30f3\u30b9\u304c\u7d44\u307f\u5408\u308f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u3001\u4f4d\u76f8\u89d2\u306f\u30bc\u30ed\u304b\u3089 +\/- 90\u00b0 \u306e\u7bc4\u56f2\u3067\u5909\u5316\u3057\u307e\u3059\u3002\u5177\u4f53\u7684\u306a\u8a08\u7b97\u306b\u306f\u30d9\u30af\u30c8\u30eb\u89e3\u6790\u3084\u30aa\u30fc\u30e0\u306e\u6cd5\u5247\u3092\u9069\u7528\u3057\u3001\u8907\u7d20\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u4ea4\u6d41\u56de\u8def\u306b\u304a\u3051\u308b\u4f4d\u76f8\u89d2\u306e\u91cd\u8981\u6027<\/h2>\n<p>\u4ea4\u6d41\u56de\u8def\u306b\u304a\u3051\u308b\u4f4d\u76f8\u89d2\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\uff1a<\/p>\n<ul>\n<li><strong>\u30d1\u30ef\u30fc\u8a08\u7b97<\/strong>\uff1a\u96fb\u529b\uff08P\uff09\u306f\u3001\u96fb\u5727\uff08V\uff09\u3001\u96fb\u6d41\uff08I\uff09\u3001\u304a\u3088\u3073\u5f7c\u3089\u306e\u4f4d\u76f8\u89d2\uff08\u03c6\uff09\u306e\u7a4d\u3067\u8a08\u7b97\u3055\u308c\u307e\u3059\u3002<br \/>\n    P = V * I * cos(\u03c6)\n  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