{"id":143730,"date":"2024-01-14T13:20:08","date_gmt":"2024-01-14T13:20:08","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e7%a3%81%e6%9d%9f%e5%af%86%e5%ba%a6-%e9%9b%bb%e6%b0%97-%e7%a3%81%e6%b0%97\/"},"modified":"2024-02-21T19:50:56","modified_gmt":"2024-02-21T19:50:56","slug":"%e7%a3%81%e6%9d%9f%e5%af%86%e5%ba%a6-%e9%9b%bb%e6%b0%97-%e7%a3%81%e6%b0%97","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e7%a3%81%e6%9d%9f%e5%af%86%e5%ba%a6-%e9%9b%bb%e6%b0%97-%e7%a3%81%e6%b0%97\/","title":{"rendered":"\u78c1\u675f\u5bc6\u5ea6 | \u96fb\u6c17 &#8211; \u78c1\u6c17"},"content":{"rendered":"<h2>\u78c1\u675f\u5bc6\u5ea6\u306b\u3064\u3044\u3066<\/h2>\n<p>\u78c1\u675f\u5bc6\u5ea6\u306f\u3001\u7279\u5b9a\u306e\u7a7a\u9593\u70b9\u306b\u304a\u3051\u308b\u78c1\u5834\u306e\u5f37\u3055\u3068\u65b9\u5411\u3092\u8868\u3059\u30d9\u30af\u30c8\u30eb\u91cf\u3067\u3042\u308a\u3001\u4e00\u822c\u306bB\u3068\u8868\u8a18\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u78c1\u5834\u7dda\u304c\u5358\u4f4d\u9762\u7a4d\u3092\u5782\u76f4\u306b\u901a\u904e\u3059\u308b\u6570\u3092\u6e2c\u5b9a\u3059\u308b\u3082\u306e\u3067\u3001\u78c1\u5834\u306e\u6982\u5ff5\u3068\u5bc6\u63a5\u306b\u95a2\u9023\u3057\u3066\u3044\u307e\u3059\u3002\u3057\u3070\u3057\u3070\u3001\u78c1\u5834\u3068\u78c1\u675f\u5bc6\u5ea6\u306e\u7528\u8a9e\u306f\u4e92\u63db\u7684\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u78c1\u675f\u5bc6\u5ea6\u306f\u3001\u56fd\u969b\u5358\u4f4d\u7cfb\uff08SI\uff09\u3067\u306f\u30c6\u30b9\u30e9\uff08T\uff09\u3067\u6e2c\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u78c1\u5834\u306e\u5f37\u5ea6\u3068\u306e\u95a2\u4fc2<\/h2>\n<p>\u96fb\u78c1\u6c17\u5b66\u306e\u6587\u8108\u3067\u306f\u3001\u78c1\u5834\u306e\u5f37\u5ea6\uff08\u307e\u305f\u306f\u78c1\u5834\u5f37\u5ea6\uff09\u3068\u547c\u3070\u308c\u308b\u5225\u306e\u7528\u8a9e\u3082\u3042\u308a\u3001\u3053\u308c\u306fH\u3067\u8868\u3055\u308c\u307e\u3059\u3002\u78c1\u675f\u5bc6\u5ea6\uff08B\uff09\u3068\u78c1\u5834\u5f37\u5ea6\uff08H\uff09\u306e\u95a2\u4fc2\u306f\u4ee5\u4e0b\u306e\u5f0f\u3067\u4e0e\u3048\u3089\u308c\u307e\u3059\uff1a<\/p>\n<p><i>B = \u03bc * H<\/i><\/p>\n<p>\u3053\u3053\u3067\u3001<br \/>\nB\u306f\u78c1\u675f\u5bc6\u5ea6\uff08\u30c6\u30b9\u30e9\u3001T\uff09\u3001<br \/>\n\u03bc\u306f\u5a92\u4f53\u306e\u900f\u78c1\u7387\uff08\u30d8\u30f3\u30ea\u30fc\u6bce\u30e1\u30fc\u30c8\u30eb\u3001H\/m\uff09\u3001<br \/>\nH\u306f\u78c1\u5834\u5f37\u5ea6\uff08\u30a2\u30f3\u30da\u30a2\u30bf\u30fc\u30f3\u6bce\u30e1\u30fc\u30c8\u30eb\u3001A\/m\uff09\u3067\u3059\u3002<\/p>\n<p>\u81ea\u7531\u7a7a\u9593\u3084\u7a7a\u6c17\u4e2d\u306e\u8a08\u7b97\u3067\u306f\u3001\u900f\u78c1\u7387\uff08\u03bc\uff09\u306f\u81ea\u7531\u7a7a\u9593\u306e\u900f\u78c1\u7387\uff08\u03bc\u2080\uff09\u3001\u7d044\u03c0 \u00d7 10<sup>-7<\/sup> Tm\/A\u306e\u5b9a\u6570\u5024\u306b\u7f6e\u304d\u63db\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<h2>\u78c1\u5834\u306e\u8a08\u7b97<\/h2>\n<p>\u78c1\u5834\u306e\u8a08\u7b97\u306b\u306f\u3001\u7279\u5b9a\u306e\u6587\u8108\u3084\u78c1\u5834\u306e\u6e90\u306b\u5fdc\u3058\u3066\u3001\u3044\u304f\u3064\u304b\u306e\u6cd5\u5247\u3084\u65b9\u7a0b\u5f0f\u304c\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u6700\u3082\u91cd\u8981\u306a\u6cd5\u5247\u3084\u65b9\u7a0b\u5f0f\u306b\u306f\u4ee5\u4e0b\u306e\u3082\u306e\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n<h3>\u30d3\u30aa\u30fb\u30b5\u30d0\u30fc\u30eb\u306e\u6cd5\u5247<\/h3>\n<p>\u3053\u306e\u6cd5\u5247\u306f\u3001\u96fb\u6d41\u3092\u6d41\u308c\u308b\u5c0f\u3055\u306a\u30ef\u30a4\u30e4\u30fc\u306e\u30bb\u30b0\u30e1\u30f3\u30c8\uff08Idl\uff09\u306b\u3088\u3063\u3066\u751f\u6210\u3055\u308c\u308b\u78c1\u5834\uff08B\uff09\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002\u30d3\u30aa\u30fb\u30b5\u30d0\u30fc\u30eb\u306e\u6cd5\u5247\u306f\u3001\u7279\u306b\u30ef\u30a4\u30e4\u30fc\u306e\u30eb\u30fc\u30d7\u3084\u30b3\u30a4\u30eb\u5468\u308a\u306e\u78c1\u5834\u3092\u8a08\u7b97\u3059\u308b\u306e\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n<p><i>B = (\u03bc\u2080 \/ 4\u03c0) * \u222b(Idl \u00d7 r) \/ r<sup>3<\/sup><\/i><\/p>\n<p>\u3053\u3053\u3067\u3001<br \/>\nB\u306f\u78c1\u5834\u30d9\u30af\u30c8\u30eb\uff08\u30c6\u30b9\u30e9\u3001T\uff09\u3001<br \/>\n\u03bc\u2080\u306f\u81ea\u7531\u7a7a\u9593\u306e\u900f\u78c1\u7387\uff084\u03c0 \u00d7 10<sup>-7<\/sup> Tm\/A\uff09\u3001<br \/>\nI\u306f\u96fb\u6d41\uff08\u30a2\u30f3\u30da\u30a2\u3001A\uff09\u3001<br \/>\ndl\u306f\u30ef\u30a4\u30e4\u30fc\u306e\u5fae\u5c0f\u9577\u3055\u30d9\u30af\u30c8\u30eb\uff08\u30e1\u30fc\u30c8\u30eb\u3001m\uff09\u3001<br \/>\nr\u306f\u30ef\u30a4\u30e4\u30fc\u304b\u3089\u8a08\u7b97\u70b9\u307e\u3067\u306e\u4f4d\u7f6e\u30d9\u30af\u30c8\u30eb\uff08\u30e1\u30fc\u30c8\u30eb\u3001m\uff09\u3001<br \/>\n\u00d7\u306f\u30af\u30ed\u30b9\u7a4d\u3001<br \/>\n\u222b\u306f\u30ef\u30a4\u30e4\u30fc\u306e\u9577\u3055\u306b\u308f\u305f\u308b\u7a4d\u5206\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<h3>\u30a2\u30f3\u30da\u30fc\u30eb\u306e\u6cd5\u5247<\/h3>\n<p>\u30a2\u30f3\u30da\u30fc\u30eb\u306e\u6cd5\u5247\u306f\u3001\u9589\u3058\u305f\u30eb\u30fc\u30d7\u3092\u901a\u308b\u78c1\u5834\uff08B\uff09\u306e\u5faa\u74b0\u3068\u3001\u30eb\u30fc\u30d7\u3092\u901a\u904e\u3059\u308b\u7d14\u96fb\u6d41\uff08I\uff09\u3068\u306e\u95a2\u4fc2\u3092\u95a2\u9023\u4ed8\u3051\u307e\u3059\u3002\u76f4\u7dda\u5c0e\u4f53\u3001\u30bd\u30ec\u30ce\u30a4\u30c9\u3001\u30c8\u30ed\u30a4\u30c9\u306a\u3069\u306e\u9ad8\u3044\u5bfe\u79f0\u6027\u3092\u6301\u3064\u5834\u5408\u306e\u78c1\u5834\u3092\u8a08\u7b97\u3059\u308b\u306e\u306b\u7279\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n<p><i>\u222e B \u2022 dl = \u03bc\u2080 * I_enclosed<\/i><\/p>\n<p>\u3053\u3053\u3067\u3001<br \/>\nB\u306f\u78c1\u5834\u30d9\u30af\u30c8\u30eb\uff08\u30c6\u30b9\u30e9\u3001T\uff09\u3001<br \/>\ndl\u306f\u9589\u30eb\u30fc\u30d7\u306b\u6cbf\u3063\u305f\u5fae\u5c0f\u9577\u3055\u30d9\u30af\u30c8\u30eb\uff08\u30e1\u30fc\u30c8\u30eb\u3001m\uff09\u3001<br \/>\n\u03bc\u2080\u306f\u81ea\u7531\u7a7a\u9593\u306e\u900f\u78c1\u7387\uff084\u03c0 \u00d7 10<sup>-7<\/sup> Tm\/A\uff09\u3001<br \/>\nI_enclosed\u306f\u30eb\u30fc\u30d7\u3092\u901a\u904e\u3059\u308b\u7d14\u96fb\u6d41\uff08\u30a2\u30f3\u30da\u30a2\u3001A\uff09\u3001<br \/>\n\u222e\u306f\u9589\u3058\u305f\u30eb\u30fc\u30d7\u5468\u308a\u306e\u7dda\u7a4d\u5206\u3001<br \/>\n\u2022\u306f\u30c9\u30c3\u30c8\u7a4d\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<h3>\u78c1\u6c17\u306b\u95a2\u3059\u308b\u30ac\u30a6\u30b9\u306e\u6cd5\u5247<\/h3>\n<p>\u78c1\u6c17\u306b\u95a2\u3059\u308b\u30ac\u30a6\u30b9\u306e\u6cd5\u5247\u306f\u3001\u9589\u3058\u305f\u8868\u9762\u3092\u901a\u904e\u3059\u308b\u7d14\u78c1\u675f\u306f\u5e38\u306b\u30bc\u30ed\u3067\u3042\u308b\u3068\u8ff0\u3079\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u78c1\u5834\u304c\u53cc\u6975\u5b50\uff08\u3064\u307e\u308a\u3001\u5317\u6975\u3068\u5357\u6975\u3092\u6301\u3064\uff09\u306b\u3088\u3063\u3066\u4f5c\u3089\u308c\u3001\u78c1\u5834\u7dda\u306f\u5e38\u306b\u9589\u3058\u305f\u30eb\u30fc\u30d7\u3092\u5f62\u6210\u3059\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<p><i>\u222e B \u2022 dA = 0<\/i><\/p>\n<p>\u3053\u3053\u3067\u3001<br \/>\nB\u306f\u78c1\u5834\u30d9\u30af\u30c8\u30eb\uff08\u30c6\u30b9\u30e9\u3001T\uff09\u3001<br \/>\ndA\u306f\u9589\u3058\u305f\u8868\u9762\u4e0a\u306e\u5fae\u5c0f\u9762\u7a4d\u30d9\u30af\u30c8\u30eb\uff08\u5e73\u65b9\u30e1\u30fc\u30c8\u30eb\u3001m<sup>2<\/sup>\uff09\u3001<br \/>\n\u222e\u306f\u9589\u3058\u305f\u8868\u9762\u4e0a\u306e\u9762\u7a4d\u7a4d\u5206\u3001<br \/>\n\u2022\u306f\u30c9\u30c3\u30c8\u7a4d\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3089\u306e\u6cd5\u5247\u3084\u65b9\u7a0b\u5f0f\u306f\u3001\u7279\u5b9a\u306e\u78c1\u6027\u6750\u6599\u306e\u7279\u6027\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u69d8\u3005\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u306e\u78c1\u5834\u3092\u8a08\u7b97\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u3088\u308a\u8907\u96d1\u306a\u72b6\u6cc1\u3067\u306f\u3001\u6b63\u78ba\u306a\u7d50\u679c\u3092\u5f97\u308b\u305f\u3081\u306b\u6570\u5024\u7684\u65b9\u6cd5\u3084\u5c02\u9580\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u304c\u5fc5\u8981\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2022\/01\/logo.png\" alt=\"Magnetic Flux Density\" \/><\/p>\n<div style=\"text-align: center; font-size: 20px;\">\n    <a href=\"https:\/\/www.electricity-magnetism.org\/magnetic-flux-density\/\">Original Article<\/a>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u822c\u306b B \u3068\u8868\u3055\u308c\u308b\u78c1\u675f\u5bc6\u5ea6\u306f\u3001\u7a7a\u9593\u5185\u306e\u7279\u5b9a\u306e\u70b9\u306b\u304a\u3051\u308b\u78c1\u5834\u306e\u5f37\u3055\u3068\u65b9\u5411\u3092\u8868\u3059\u30d9\u30af\u30c8\u30eb\u91cf\u3067\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":1579,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[13],"tags":[],"class_list":["post-143730","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-13","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - 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\u3068\u8868\u3055\u308c\u308b\u78c1\u675f\u5bc6\u5ea6\u306f\u3001\u7a7a\u9593\u5185\u306e\u7279\u5b9a\u306e\u70b9\u306b\u304a\u3051\u308b\u78c1\u5834\u306e\u5f37\u3055\u3068\u65b9\u5411\u3092\u8868\u3059\u30d9\u30af\u30c8\u30eb\u91cf\u3067\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.electricity-magnetism.org\/ja\/%e7%a3%81%e6%9d%9f%e5%af%86%e5%ba%a6-%e9%9b%bb%e6%b0%97-%e7%a3%81%e6%b0%97\/\" \/>\n<meta property=\"og:site_name\" content=\"Electricity - Magnetism\" \/>\n<meta property=\"article:published_time\" content=\"2024-01-14T13:20:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-02-21T19:50:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2022\/01\/logo.png\" \/>\n\t<meta property=\"og:image:width\" content=\"200\" \/>\n\t<meta property=\"og:image:height\" content=\"200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" 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