{"id":209126,"date":"2024-03-21T14:06:07","date_gmt":"2024-03-21T14:06:07","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e7%9a%ae%e8%86%9a%e5%8a%b9%e6%9e%9c%e3%81%ae%e5%bc%8f-%e7%90%86%e8%a7%a3%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95%e3%81%a8%e5%bf%9c%e7%94%a8\/"},"modified":"2024-05-17T15:07:37","modified_gmt":"2024-05-17T15:07:37","slug":"%e7%9a%ae%e8%86%9a%e5%8a%b9%e6%9e%9c%e3%81%ae%e5%bc%8f-%e7%90%86%e8%a7%a3%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95%e3%81%a8%e5%bf%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e7%9a%ae%e8%86%9a%e5%8a%b9%e6%9e%9c%e3%81%ae%e5%bc%8f-%e7%90%86%e8%a7%a3%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95%e3%81%a8%e5%bf%9c%e7%94%a8\/","title":{"rendered":"\u76ae\u819a\u52b9\u679c\u306e\u5f0f | \u7406\u89e3\u3001\u8a08\u7b97\u65b9\u6cd5\u3068\u5fdc\u7528"},"content":{"rendered":"<p class=\"sidekick\">\u76ae\u819a\u52b9\u679c\u306e\u5f0f\u3068\u305d\u306e\u7406\u89e3\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5fdc\u7528\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u305f\u8a18\u4e8b\u3002\u7279\u306b\u9ad8\u5468\u6ce2\u306e\u96fb\u6d41\u3067\u9855\u8457\u306a\u76ae\u819a\u52b9\u679c\u306e\u73fe\u8c61\u3084\u5f71\u97ff\u3092\u63a2\u308a\u307e\u3059\u3002<\/p>\n<h2>\u76ae\u819a\u52b9\u679c\u306e\u5f0f | \u7406\u89e3\u3001\u8a08\u7b97\u65b9\u6cd5\u3068\u5fdc\u7528<\/h2>\n<p>\u76ae\u819a\u52b9\u679c\u306f\u3001\u96fb\u6c17\u3068\u78c1\u6c17\u306e\u5206\u91ce\u3067\u91cd\u8981\u306a\u73fe\u8c61\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u4ea4\u6d41\u96fb\u6d41\uff08AC\uff09\u304c\u5c0e\u4f53\u5185\u90e8\u3092\u6d41\u308c\u308b\u3068\u304d\u3001\u96fb\u6d41\u304c\u5c0e\u4f53\u306e\u8868\u9762\u8fd1\u304f\u306b\u96c6\u4e2d\u3057\u3001\u5185\u90e8\u306b\u306f\u307b\u3068\u3093\u3069\u6d41\u308c\u306a\u3044\u73fe\u8c61\u3067\u3059\u3002\u3053\u306e\u52b9\u679c\u306f\u7279\u306b\u9ad8\u5468\u6ce2\u306e\u96fb\u6d41\u3067\u9855\u8457\u306b\u73fe\u308c\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u76ae\u819a\u52b9\u679c\u306e\u57fa\u672c\u7684\u306a\u7406\u89e3\u3001\u8a08\u7b97\u65b9\u6cd5\u304a\u3088\u3073\u305d\u306e\u5fdc\u7528\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>\u76ae\u819a\u52b9\u679c\u306e\u7406\u89e3<\/h2>\n<p>\u76ae\u819a\u52b9\u679c\u306e\u4e3b\u306a\u539f\u56e0\u306f\u3001\u4ea4\u6d41\u78c1\u5834\u306b\u3088\u3063\u3066\u8a98\u5c0e\u3055\u308c\u308b\u6e26\u96fb\u6d41\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5c0e\u4f53\u5185\u90e8\u306e\u96fb\u6d41\u5206\u5e03\u304c\u975e\u5747\u4e00\u306b\u306a\u308a\u3001\u8868\u9762\u306b\u5411\u304b\u3063\u3066\u96fb\u6d41\u304c\u96c6\u4e2d\u3057\u307e\u3059\u3002\u3053\u306e\u73fe\u8c61\u306f\u3001\u5c0e\u4f53\u306e\u52b9\u679c\u7684\u306a\u65ad\u9762\u7a4d\u3092\u6e1b\u5c11\u3055\u305b\u3001\u7d50\u679c\u3068\u3057\u3066\u4ea4\u6d41\u62b5\u6297\u3092\u5897\u52a0\u3055\u305b\u307e\u3059\u3002<\/p>\n<h2>\u76ae\u819a\u52b9\u679c\u306e\u5f0f<\/h2>\n<p>\u76ae\u819a\u52b9\u679c\u306e\u6df1\u3055\uff08<i>\u03b4<\/i>\u3001\u76ae\u819a\u6df1\u3055\u3068\u547c\u3070\u308c\u308b\uff09\u306f\u6b21\u306e\u5f0f\u3067\u4e0e\u3048\u3089\u308c\u307e\u3059\uff1a<\/p>\n<p>$$ \\delta = \\sqrt{\\frac{2\\rho}{\\omega \\mu}} $$<\/p>\n<p>\u3053\u3053\u3067\uff1a<\/p>\n<ul>\n<li><i>\u03b4<\/i>: \u76ae\u819a\u6df1\u3055\uff08\u30e1\u30fc\u30c8\u30eb\uff09<\/li>\n<li><i>\u03c1<\/i>: \u6750\u6599\u306e\u96fb\u6c17\u62b5\u6297\u7387\uff08\u30aa\u30fc\u30e0\u30fb\u30e1\u30fc\u30c8\u30eb\uff09<\/li>\n<li><i>\u03c9<\/i>: \u89d2\u5468\u6ce2\u6570\uff08\u30e9\u30b8\u30a2\u30f3\u6bce\u79d2\uff09 = 2\u03c0f  \uff08<i>f<\/i>: \u5468\u6ce2\u6570\uff08\u30d8\u30eb\u30c4\uff09\uff09<\/li>\n<li><i>\u03bc<\/i>: \u78c1\u6c17\u900f\u904e\u7387\uff08\u30d8\u30f3\u30ea\u30fc\u6bce\u30e1\u30fc\u30c8\u30eb\uff09 = \u03bc<sub>0<\/sub>\u03bc<sub>r<\/sub><\/li>\n<li>\u03bc<sub>0<\/sub>: \u771f\u7a7a\u306e\u900f\u78c1\u7387\uff084\u03c0 \u00d7 10<sup>-7<\/sup> H\/m\uff09<\/li>\n<li>\u03bc<sub>r<\/sub>: \u6750\u6599\u306e\u76f8\u5bfe\u900f\u78c1\u7387<\/li>\n<\/ul>\n<h2>\u8a08\u7b97\u65b9\u6cd5<\/h2>\n<p>\u5177\u4f53\u7684\u306a\u6750\u6599\u3068\u5468\u6ce2\u6570\u306b\u3064\u3044\u3066\u76ae\u819a\u52b9\u679c\u3092\u8a08\u7b97\u3059\u308b\u305f\u3081\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u9285\u306e\u5c0e\u4f53\u3092\u4f7f\u3044\u3001\u5468\u6ce2\u6570\u304c60 Hz\u306e\u5834\u5408\uff1a<\/p>\n<ul>\n<li>\u9285\u306e\u96fb\u6c17\u62b5\u6297\u7387\u3001<i>\u03c1<\/i> = 1.68 \u00d7 10<sup>-8<\/sup> \u03a9\u00b7m<\/li>\n<li>\u89d2\u5468\u6ce2\u6570\u3001<i>\u03c9<\/i> = 2\u03c0 \u00d7 60 = 377 rad\/s<\/li>\n<li>\u9285\u306e\u78c1\u6c17\u900f\u904e\u7387\u3001<i>\u03bc<\/i> = 4\u03c0 \u00d7 10<sup>-7<\/sup> H\/m <\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u3092\u76ae\u819a\u52b9\u679c\u306e\u5f0f\u306b\u4ee3\u5165\u3059\u308b\u3068\uff1a<\/p>\n<p>$$ \\delta = \\sqrt{\\frac{2 \\times 1.68 \\times 10^{-8}}{377 \\times 4\\pi \\times 10^{-7}}} $$<\/p>\n<p>\u8a08\u7b97\u7d50\u679c\uff1a<\/p>\n<p>$$ \\delta \\approx 8.5 \\times 10^{-4} \\, \\text{m} = 0.85 \\, \\text{mm} $$<\/p>\n<p>\u3057\u305f\u304c\u3063\u3066\u300160 Hz\u306e\u4ea4\u6d41\u96fb\u6d41\u3067\u306f\u3001\u9285\u306e\u5c0e\u4f53\u306e\u8868\u9762\u304b\u3089\u7d040.85 mm\u306e\u6df1\u3055\u307e\u3067\u3057\u304b\u96fb\u6d41\u304c\u6d41\u308c\u307e\u305b\u3093\u3002<\/p>\n<h2>\u76ae\u819a\u52b9\u679c\u306e\u5fdc\u7528<\/h2>\n<p>\u76ae\u819a\u52b9\u679c\u306f\u591a\u304f\u306e\u5b9f\u969b\u306e\u5fdc\u7528\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u4e3b\u306a\u3082\u306e\u306b\u306f\u4ee5\u4e0b\u304c\u542b\u307e\u308c\u307e\u3059\uff1a<\/p>\n<ul>\n<li><b>\u5c0e\u4f53\u306e\u8a2d\u8a08\uff1a<\/b>\u9ad8\u5468\u6ce2\u96fb\u6d41\u304c\u6d41\u308c\u308b\u5834\u5408\u3001\u5c0e\u4f53\u306e\u592a\u3055\u3092\u8abf\u6574\u3059\u308b\u3053\u3068\u3067\u62b5\u6297\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/li>\n<li><b>\u9001\u96fb\u7dda\uff1a<\/b>\u9ad8\u5468\u6ce2\u306e\u9001\u96fb\u3067\u306f\u3001\u5c0e\u4f53\u306e\u8868\u9762\u7a4d\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u591a\u82af\u30b1\u30fc\u30d6\u30eb\u3084\u30e9\u30c3\u30c4\u30b1\u30fc\u30d6\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u76ae\u819a\u52b9\u679c\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u52b9\u7387\u7684\u306a\u96fb\u529b\u4f1d\u9001\u304c\u53ef\u80fd\u3067\u3059\u3002<\/li>\n<li><b>\u96fb\u5b50\u6a5f\u5668\uff1a<\/b>\u9ad8\u5468\u6ce2\u3092\u6271\u3046\u96fb\u5b50\u6a5f\u5668\u3067\u306f\u3001\u76ae\u819a\u52b9\u679c\u304c\u8003\u616e\u3055\u308c\u308b\u3079\u304d\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u30d7\u30ea\u30f3\u30c8\u57fa\u677f\u306e\u8a2d\u8a08\u6642\u306b\u5fae\u7d30\u306a\u5c0e\u7dda\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u76ae\u819a\u52b9\u679c\u306e\u7406\u89e3\u3068\u305d\u306e\u5f71\u97ff\u3092\u77e5\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u679c\u7684\u306a\u5c0e\u4f53\u8a2d\u8a08\u3084\u96fb\u529b\u7ba1\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u3001\u52b9\u7387\u7684\u306a\u96fb\u6c17\u304a\u3088\u3073\u96fb\u5b50\u30b7\u30b9\u30c6\u30e0\u306e\u69cb\u7bc9\u304c\u671f\u5f85\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u76ae\u819a\u52b9\u679c\u306e\u5f0f\u3068\u305d\u306e\u7406\u89e3\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5fdc\u7528\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u305f\u8a18\u4e8b\u3002\u7279\u306b\u9ad8\u5468\u6ce2\u306e\u96fb\u6d41\u3067\u9855\u8457\u306a\u76ae\u819a\u52b9\u679c\u306e\u73fe\u8c61\u3084\u5f71\u97ff\u3092\u63a2\u308a\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-209126","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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