{"id":209281,"date":"2024-03-21T14:07:04","date_gmt":"2024-03-21T14:07:04","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e5%85%ad%e8%a7%92%e5%bd%a2%e3%83%ab%e3%83%bc%e3%83%97%e3%81%ae%e4%b8%ad%e5%bf%83%e3%81%ae%e7%a3%81%e5%a0%b4-%e8%a7%a3%e6%9e%90%e3%81%a8%e5%bf%9c%e7%94%a8\/"},"modified":"2024-05-17T15:09:57","modified_gmt":"2024-05-17T15:09:57","slug":"%e5%85%ad%e8%a7%92%e5%bd%a2%e3%83%ab%e3%83%bc%e3%83%97%e3%81%ae%e4%b8%ad%e5%bf%83%e3%81%ae%e7%a3%81%e5%a0%b4-%e8%a7%a3%e6%9e%90%e3%81%a8%e5%bf%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e5%85%ad%e8%a7%92%e5%bd%a2%e3%83%ab%e3%83%bc%e3%83%97%e3%81%ae%e4%b8%ad%e5%bf%83%e3%81%ae%e7%a3%81%e5%a0%b4-%e8%a7%a3%e6%9e%90%e3%81%a8%e5%bf%9c%e7%94%a8\/","title":{"rendered":"\u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u306e\u4e2d\u5fc3\u306e\u78c1\u5834 | \u89e3\u6790\u3068\u5fdc\u7528"},"content":{"rendered":"

\u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u306e\u4e2d\u5fc3\u306e\u78c1\u5834\u306b\u3064\u3044\u3066\u306e\u89e3\u6790\u3068\u5fdc\u7528\u3001\u96fb\u6d41\u306e\u6d41\u308c\u308b\u30eb\u30fc\u30d7\u304b\u3089\u751f\u3058\u308b\u78c1\u5834\u306e\u8a08\u7b97\u65b9\u6cd5\u3084\u533b\u7642\u753b\u50cf\u6280\u8853\u3001\u30a8\u30ec\u30af\u30c8\u30ed\u30cb\u30af\u30b9\u306a\u3069\u306e\u5fdc\u7528\u4f8b\u3002<\/p>\n

\u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u306e\u4e2d\u5fc3\u306e\u78c1\u5834 | \u89e3\u6790\u3068\u5fdc\u7528<\/h2>\n

\u306f\u3058\u3081\u306b<\/h3>\n

\u96fb\u78c1\u6c17\u5b66\u306e\u4e2d\u3067\u3001\u7279\u306b\u30eb\u30fc\u30d7\u72b6\u306e\u5c0e\u4f53\u306b\u96fb\u6d41\u304c\u6d41\u308c\u308b\u5834\u5408\u3001\u305d\u306e\u4e2d\u5fc3\u306b\u78c1\u5834\u304c\u751f\u3058\u308b\u73fe\u8c61\u306f\u975e\u5e38\u306b\u8208\u5473\u6df1\u3044\u30c6\u30fc\u30de\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u306e\u4e2d\u5fc3\u306b\u304a\u3051\u308b\u78c1\u5834\u306b\u3064\u3044\u3066\u89e3\u6790\u3057\u3001\u305d\u306e\u5fdc\u7528\u306b\u3064\u3044\u3066\u3082\u8003\u5bdf\u3057\u307e\u3059\u3002<\/p>\n

\u78c1\u5834\u306e\u8a08\u7b97<\/h3>\n

\u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u306e\u305d\u308c\u305e\u308c\u306e\u8fba\u3067\u751f\u3058\u308b\u78c1\u5834\u3092\u7a4d\u5206\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u4e2d\u592e\u306e\u78c1\u5834\u3092\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u306fBiot-Savart\u306e\u6cd5\u5247\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002Biot-Savart\u306e\u6cd5\u5247\u306b\u3088\u308c\u3070\u3001\u4efb\u610f\u306e\u30dd\u30a4\u30f3\u30c8\u306b\u304a\u3051\u308b\u78c1\u5834 \\( \\vec{B} \\) \u306f\u6b21\u306e\u3088\u3046\u306b\u4e0e\u3048\u3089\u308c\u307e\u3059\uff1a<\/p>\n

\\[
\nd\\vec{B} = \\frac{\\mu_0 I}{4 \\pi} \\frac{d\\vec{l} \\times \\vec{r}}{r^3}
\n\\]<\/p>\n

\u305f\u3060\u3057\u3001 \\(\\mu_0\\) \u306f\u771f\u7a7a\u306e\u900f\u78c1\u7387\u3001\\(I\\) \u306f\u96fb\u6d41\u3001\\(d\\vec{l}\\) \u306f\u5fae\u5c0f\u9577\u3055\u306e\u30d9\u30af\u30c8\u30eb\u3001\\(\\vec{r}\\) \u306f\u89b3\u6e2c\u70b9\u307e\u3067\u306e\u4f4d\u7f6e\u30d9\u30af\u30c8\u30eb\u3067\u3059\u3002<\/p>\n

\u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u306e\u5404\u8fba\u306f\u540c\u4e00\u306e\u9577\u3055\u3067\u3059\u306e\u3067\u3001\u5bfe\u79f0\u6027\u3092\u8003\u3048\u308c\u3070\u3001\u5404\u8fba\u306b\u3088\u308b\u78c1\u5834\u306e\u5bc4\u4e0e\u3092\u6c42\u3081\u3001\u3053\u308c\u3092\u5408\u7b97\u3059\u308b\u3053\u3068\u3067\u4e2d\u592e\u306e\u78c1\u5834\u3092\u5f97\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n

\u5177\u4f53\u7684\u306a\u8a08\u7b97<\/h3>\n

\u30eb\u30fc\u30d7\u306e\u4e00\u8fba\u3092 \\(L\\) \u3001\u30eb\u30fc\u30d7\u306e\u4e2d\u5fc3\u304b\u3089\u5404\u8fba\u306e\u8ddd\u96e2\u3092 \\(R\\) \u3068\u3057\u307e\u3059\u3002\u516d\u89d2\u5f62\u306f\u5408\u8a08\u3067\u516d\u8fba\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u5404\u8fba\u304b\u3089\u306e\u5bc4\u4e0e\u3092\u5408\u8a08\u3057\u305f\u78c1\u5834 \\(|\\vec{B_{\\text{total}}}|\\) \u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n

\\[
\n|\\vec{B_{\\text{total}}}| = 6 \\times |\\vec{B_{\\text{edge}}}|
\n\\]<\/p>\n

\u8a73\u7d30\u306a\u8a08\u7b97\u306f\u7701\u7565\u3057\u307e\u3059\u304c\u3001\u96fb\u6d41 \\(I\\) \u304c\u6d41\u308c\u308b\u8fba\u3067\u751f\u3058\u308b\u78c1\u5834 \\(|\\vec{B_{\\text{edge}}}|\\) \u306e\u5bc4\u4e0e\u3092\u6c42\u3081\u3001\u305d\u308c\u30926\u500d\u3059\u308b\u3053\u3068\u3067\u5168\u4f53\u306e\u78c1\u5834\u5f37\u5ea6\u3092\u6c42\u3081\u307e\u3059\u3002<\/p>\n

\u5fdc\u7528\u4f8b<\/h3>\n

\u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u306b\u3088\u308b\u78c1\u5834\u306e\u751f\u6210\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5fdc\u7528\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n

    \n
  1. \u30a8\u30ec\u30af\u30c8\u30ed\u30cb\u30af\u30b9\uff1a<\/strong> \u78c1\u5834\u3092\u5229\u7528\u3057\u305f\u30bb\u30f3\u30b5\u30fc\u3084\u30b3\u30a4\u30eb\u8a2d\u8a08\u306b\u5fdc\u7528\u3055\u308c\u307e\u3059\u3002\u7279\u306b\u3001\u7279\u5b9a\u306e\u5f62\u72b6\u3084\u96fb\u6d41\u5f37\u5ea6\u3092\u6301\u3064\u30eb\u30fc\u30d7\u3067\u7279\u5b9a\u306e\u78c1\u5834\u3092\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/li>\n
  2. \u533b\u7642\u753b\u50cf\u6280\u8853\uff1a<\/strong> \u78c1\u6c17\u5171\u9cf4\u753b\u50cf\uff08MRI\uff09\u306a\u3069\u306e\u533b\u7642\u6280\u8853\u3067\u7cbe\u5bc6\u306a\u78c1\u5834\u304c\u5fc5\u8981\u3068\u3055\u308c\u308b\u5834\u5408\u3001\u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u69cb\u9020\u304c\u5b89\u5b9a\u3057\u305f\u78c1\u5834\u751f\u6210\u306b\u6709\u52b9\u3067\u3059\u3002<\/li>\n
  3. \u96fb\u78c1\u6ce2\u7814\u7a76\uff1a<\/strong> \u9ad8\u7cbe\u5ea6\u306e\u78c1\u5834\u3092\u751f\u6210\u3059\u308b\u5b9f\u9a13\u88c5\u7f6e\u3068\u3057\u3066\u3001\u96fb\u78c1\u6ce2\u306e\u6027\u8cea\u3092\u7814\u7a76\u3059\u308b\u305f\u3081\u306e\u57fa\u76e4\u3068\u3057\u3066\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n

    \u307e\u3068\u3081<\/h3>\n

    \u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u306e\u4e2d\u5fc3\u306b\u304a\u3051\u308b\u78c1\u5834\u306e\u89e3\u6790\u306f\u3001\u96fb\u78c1\u6c17\u5b66\u306e\u57fa\u672c\u539f\u7406\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u4e00\u52a9\u3068\u306a\u308a\u307e\u3059\u3002\u8a08\u7b97\u306b\u306fBiot-Savart\u306e\u6cd5\u5247\u3084\u5bfe\u79f0\u6027\u306e\u6027\u8cea\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u3001\u7c21\u4fbf\u306b\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u7406\u8ad6\u306f\u3001\u591a\u7a2e\u591a\u69d8\u306a\u5b9f\u4e16\u754c\u306e\u5fdc\u7528\u306b\u4e0d\u53ef\u6b20\u3067\u3042\u308a\u3001\u6280\u8853\u306e\u9032\u6b69\u306b\u5bc4\u4e0e\u3057\u3066\u3044\u307e\u3059\u3002\u78c1\u5834\u306e\u7406\u89e3\u3068\u5fdc\u7528\u3092\u6df1\u3081\u308b\u3053\u3068\u3067\u3001\u66f4\u306a\u308b\u65b0\u6280\u8853\u306e\u958b\u767a\u304c\u671f\u5f85\u3055\u308c\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u306e\u4e2d\u5fc3\u306e\u78c1\u5834\u306b\u3064\u3044\u3066\u306e\u89e3\u6790\u3068\u5fdc\u7528\u3001\u96fb\u6d41\u306e\u6d41\u308c\u308b\u30eb\u30fc\u30d7\u304b\u3089\u751f\u3058\u308b\u78c1\u5834\u306e\u8a08\u7b97\u65b9\u6cd5\u3084\u533b\u7642\u753b\u50cf\u6280\u8853\u3001\u30a8\u30ec\u30af\u30c8\u30ed\u30cb\u30af\u30b9\u306a\u3069\u306e\u5fdc\u7528\u4f8b\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-209281","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":"\n\u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u306e\u4e2d\u5fc3\u306e\u78c1\u5834 | \u89e3\u6790\u3068\u5fdc\u7528<\/title>\n<meta name=\"description\" content=\"\u516d\u89d2\u5f62\u30eb\u30fc\u30d7\u306e\u4e2d\u5fc3\u306e\u78c1\u5834\u306b\u3064\u3044\u3066\u306e\u89e3\u6790\u3068\u5fdc\u7528\u3001\u96fb\u6d41\u306e\u6d41\u308c\u308b\u30eb\u30fc\u30d7\u304b\u3089\u751f\u3058\u308b\u78c1\u5834\u306e\u8a08\u7b97\u65b9\u6cd5\u3084\u533b\u7642\u753b\u50cf\u6280\u8853\u3001\u30a8\u30ec\u30af\u30c8\u30ed\u30cb\u30af\u30b9\u306a\u3069\u306e\u5fdc\u7528\u4f8b\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.electricity-magnetism.org\/ja\/%e5%85%ad%e8%a7%92%e5%bd%a2%e3%83%ab%e3%83%bc%e3%83%97%e3%81%ae%e4%b8%ad%e5%bf%83%e3%81%ae%e7%a3%81%e5%a0%b4-%e8%a7%a3%e6%9e%90%e3%81%a8%e5%bf%9c%e7%94%a8\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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