{"id":209124,"date":"2024-03-21T14:06:07","date_gmt":"2024-03-21T14:06:07","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e7%a3%81%e6%b0%97%e6%b8%9b%e8%a1%b0%e3%81%ae%e5%bc%8f-%e8%a7%a3%e8%aa%ac%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%a3%81%e6%b0%97%e6%b8%9b%e8%a1%b0%e3%81%ae%e5%bc%8f-%e8%a7%a3%e8%aa%ac%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%a3%81%e6%b0%97%e6%b8%9b%e8%a1%b0%e3%81%ae%e5%bc%8f-%e8%a7%a3%e8%aa%ac%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":"\u78c1\u6c17\u6e1b\u8870\u306e\u5f0f | \u89e3\u8aac\u3001\u8a08\u7b97\u65b9\u6cd5\u3068\u5fdc\u7528"},"content":{"rendered":"<p class=\"sidekick\">\u78c1\u6c17\u6e1b\u8870\u306e\u57fa\u672c\u6982\u5ff5\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5177\u4f53\u4f8b\u3001\u5fdc\u7528\u306b\u3064\u3044\u3066\u89e3\u8aac\u3002\u96fb\u78c1\u30d6\u30ec\u30fc\u30ad\u3084\u632f\u52d5\u6e1b\u8870\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u5909\u63db\u306a\u3069\u306e\u5b9f\u969b\u306e\u5fdc\u7528\u4f8b\u3082\u7d39\u4ecb\u3002<\/p>\n<h2>\u78c1\u6c17\u6e1b\u8870\u306e\u5f0f | \u89e3\u8aac\u3001\u8a08\u7b97\u65b9\u6cd5\u3068\u5fdc\u7528<\/h2>\n<h3>\u306f\u3058\u3081\u306b<\/h3>\n<p>\u78c1\u6c17\u6e1b\u8870\uff08Magnetic Damping\uff09\u306f\u3001\u7269\u7406\u5b66\u3084\u5de5\u5b66\u306e\u5206\u91ce\u3067\u91cd\u8981\u306a\u6982\u5ff5\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u79fb\u52d5\u3059\u308b\u91d1\u5c5e\u7269\u4f53\u304c\u78c1\u5834\u3068\u76f8\u4e92\u4f5c\u7528\u3059\u308b\u3053\u3068\u3067\u52d5\u304d\u304c\u6e1b\u8870\u3059\u308b\u73fe\u8c61\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u78c1\u6c17\u6e1b\u8870\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u305d\u3057\u3066\u305d\u306e\u5fdc\u7528\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3>\u78c1\u6c17\u6e1b\u8870\u306e\u57fa\u672c\u6982\u5ff5<\/h3>\n<p>\u78c1\u6c17\u6e1b\u8870\u306f\u3001\u904b\u52d5\u3059\u308b\u7269\u4f53\u304c\u5909\u5316\u3059\u308b\u78c1\u5834\u3092\u901a\u904e\u3059\u308b\u969b\u306b\u3001\u8a98\u5c0e\u3055\u308c\u308b\u6e26\u96fb\u6d41\uff08\u30a8\u30c7\u30a3\u30ab\u30ec\u30f3\u30c8\uff09\u304c\u7269\u4f53\u306e\u904b\u52d5\u30a8\u30cd\u30eb\u30ae\u30fc\u3092\u71b1\u30a8\u30cd\u30eb\u30ae\u30fc\u306b\u5909\u63db\u3059\u308b\u73fe\u8c61\u3092\u6307\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u7269\u4f53\u306e\u904b\u52d5\u304c\u6e1b\u5c11\u3057\u3001\u7d50\u679c\u7684\u306b\u901f\u5ea6\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u3002<\/p>\n<h3>\u6e1b\u8870\u529b\u306e\u8a08\u7b97\u65b9\u6cd5<\/h3>\n<p>\u6e1b\u8870\u529b <em>F_d<\/em> \u306f\u3001\u30ed\u30fc\u30ec\u30f3\u30c4\u529b\u3068\u7269\u4f53\u306e\u901f\u5ea6\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u6e1b\u8870\u529b\u306e\u5f0f\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n<p>\n\\[<br \/>\nF_d = &#8211; b v<br \/>\n\\]\n<\/p>\n<p>\u305f\u3060\u3057\u3001<\/p>\n<ul>\n<li><em>F_d<\/em>: \u6e1b\u8870\u529b<\/li>\n<li><em>b<\/em>: \u6e1b\u8870\u5b9a\u6570\uff08\u5468\u56f2\u306e\u78c1\u5834\u5f37\u5ea6\u3084\u7269\u4f53\u306e\u7279\u6027\u306b\u4f9d\u5b58\uff09<\/li>\n<li><em>v<\/em>: \u7269\u4f53\u306e\u901f\u5ea6<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u306e\u5f0f\u3092\u7528\u3044\u3066\u3001\u6e1b\u8870\u5b9a\u6570 <em>b<\/em> \u3092\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n<p>\n\\[<br \/>\nb = \\frac{B^2 L^2 \\sigma}{R}<br \/>\n\\]\n<\/p>\n<p>\u3053\u3053\u3067\u3001<\/p>\n<ul>\n<li><em>B<\/em>: \u78c1\u5834\u306e\u5f37\u3055<\/li>\n<li><em>L<\/em>: \u52d5\u304f\u5c0e\u4f53\u306e\u9577\u3055<\/li>\n<li><em>\\sigma<\/em>: \u5c0e\u4f53\u306e\u96fb\u6c17\u4f1d\u5c0e\u7387<\/li>\n<li><em>R<\/em>: \u5c0e\u4f53\u306e\u62b5\u6297<\/li>\n<\/ul>\n<h3>\u5177\u4f53\u7684\u306a\u8a08\u7b97\u4f8b<\/h3>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u6761\u4ef6\u306e\u4e0b\u3067\u6e1b\u8870\u529b\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n<ul>\n<li>\u78c1\u5834\u306e\u5f37\u3055 <em>B<\/em> = 0.5 T\uff08\u30c6\u30b9\u30e9\uff09<\/li>\n<li>\u5c0e\u4f53\u306e\u9577\u3055 <em>L<\/em> = 1 m\uff08\u30e1\u30fc\u30c8\u30eb\uff09<\/li>\n<li>\u96fb\u6c17\u4f1d\u5c0e\u7387 <em>\\sigma<\/em> = 5.8 \u00d7 10^7 S\/m<\/li>\n<li>\u5c0e\u4f53\u306e\u62b5\u6297 <em>R<\/em> = 0.01 \u03a9\uff08\u30aa\u30fc\u30e0\uff09<\/li>\n<li>\u7269\u4f53\u306e\u901f\u5ea6 <em>v<\/em> = 2 m\/s<\/li>\n<\/ul>\n<p>\u6e1b\u8870\u5b9a\u6570 <em>b<\/em> \u306f\u6b21\u306e\u3088\u3046\u306b\u8a08\u7b97\u3067\u304d\u307e\u3059\uff1a<\/p>\n<p>\n\\[<br \/>\nb = \\frac{(0.5)^2 \\times (1)^2 \\times 5.8 \\times 10^7}{0.01} = 1.45 \\times 10^9 \\text{ Ns\/m}<br \/>\n\\]\n<\/p>\n<p>\u3053\u308c\u3092\u7528\u3044\u3066\u6e1b\u8870\u529b <em>F_d<\/em> \u3092\u6c42\u3081\u308b\u3068\uff1a<\/p>\n<p>\n\\[<br \/>\nF_d = &#8211; 1.45 \\times 10^9 \\times 2 = &#8211; 2.9 \\times 10^9 \\text{ N}<br \/>\n\\]\n<\/p>\n<h3>\u78c1\u6c17\u6e1b\u8870\u306e\u5fdc\u7528<\/h3>\n<p>\u78c1\u6c17\u6e1b\u8870\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u5206\u91ce\u3067\u5fdc\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4ee3\u8868\u7684\u306a\u3082\u306e\u306b\u4ee5\u4e0b\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n<ul>\n<li><strong>\u96fb\u78c1\u30d6\u30ec\u30fc\u30ad<\/strong>: \u96fb\u8eca\u3084\u30a8\u30ec\u30d9\u30fc\u30bf\u30fc\u306a\u3069\u306e\u5236\u52d5\u6a5f\u69cb\u306b\u5229\u7528\u3055\u308c\u3001\u6469\u64e6\u3092\u4f7f\u7528\u305b\u305a\u306b\u7269\u4f53\u306e\u904b\u52d5\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u632f\u52d5\u6e1b\u8870<\/strong>: \u6a5f\u68b0\u306e\u632f\u52d5\u3092\u4f4e\u6e1b\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u3001\u7cbe\u5bc6\u6a5f\u5668\u3084\u5efa\u7bc9\u7269\u306e\u5b89\u5b9a\u6027\u5411\u4e0a\u306b\u8ca2\u732e\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u30a8\u30cd\u30eb\u30ae\u30fc\u5909\u63db<\/strong>: \u98a8\u529b\u767a\u96fb\u3084\u56de\u8ee2\u6a5f\u5668\u306b\u304a\u3044\u3066\u3001\u904b\u52d5\u30a8\u30cd\u30eb\u30ae\u30fc\u3092\u52b9\u7387\u7684\u306b\u96fb\u6c17\u30a8\u30cd\u30eb\u30ae\u30fc\u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>\u307e\u3068\u3081<\/h3>\n<p>\u78c1\u6c17\u6e1b\u8870\u306f\u3001\u904b\u52d5\u3059\u308b\u7269\u4f53\u304c\u78c1\u5834\u3068\u76f8\u4e92\u4f5c\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u904b\u52d5\u30a8\u30cd\u30eb\u30ae\u30fc\u304c\u6e1b\u5c11\u3059\u308b\u73fe\u8c61\u3067\u3059\u3002\u3053\u308c\u3092\u7406\u89e3\u3057\u8a08\u7b97\u3059\u308b\u3053\u3068\u3067\u3001\u591a\u304f\u306e\u5b9f\u7528\u7684\u306a\u5fdc\u7528\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u6e1b\u8870\u529b\u306e\u8a08\u7b97\u306f\u6bd4\u8f03\u7684\u5358\u7d14\u3067\u3042\u308a\u3001\u57fa\u672c\u7684\u306a\u7269\u7406\u6cd5\u5247\u3092\u7528\u3044\u3066\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u65e5\u5e38\u306e\u4e2d\u3067\u78c1\u6c17\u6e1b\u8870\u3092\u89b3\u5bdf\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u5b9f\u7528\u6027\u3092\u6539\u3081\u3066\u8a8d\u8b58\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u78c1\u6c17\u6e1b\u8870\u306e\u57fa\u672c\u6982\u5ff5\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5177\u4f53\u4f8b\u3001\u5fdc\u7528\u306b\u3064\u3044\u3066\u89e3\u8aac\u3002\u96fb\u78c1\u30d6\u30ec\u30fc\u30ad\u3084\u632f\u52d5\u6e1b\u8870\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u5909\u63db\u306a\u3069\u306e\u5b9f\u969b\u306e\u5fdc\u7528\u4f8b\u3082\u7d39\u4ecb\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-209124","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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