{"id":209271,"date":"2024-03-21T14:07:00","date_gmt":"2024-03-21T14:07:00","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e8%aa%98%e9%9b%bb%e4%bd%93%e3%81%ae%e5%a2%83%e7%95%8c%e6%9d%a1%e4%bb%b6-%e6%a6%82%e8%a6%81%e3%81%a8%e8%a7%a3%e6%9e%90%e6%96%b9%e6%b3%95\/"},"modified":"2024-05-17T15:09:48","modified_gmt":"2024-05-17T15:09:48","slug":"%e8%aa%98%e9%9b%bb%e4%bd%93%e3%81%ae%e5%a2%83%e7%95%8c%e6%9d%a1%e4%bb%b6-%e6%a6%82%e8%a6%81%e3%81%a8%e8%a7%a3%e6%9e%90%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e8%aa%98%e9%9b%bb%e4%bd%93%e3%81%ae%e5%a2%83%e7%95%8c%e6%9d%a1%e4%bb%b6-%e6%a6%82%e8%a6%81%e3%81%a8%e8%a7%a3%e6%9e%90%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6 | \u6982\u8981\u3068\u89e3\u6790\u65b9\u6cd5"},"content":{"rendered":"

\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6\u306b\u3064\u3044\u3066\u306e\u6982\u8aac\u3068\u89e3\u6790\u65b9\u6cd5\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u8a98\u96fb\u4f53\u306e\u7279\u6027\u3084\u7570\u306a\u308b\u8a98\u96fb\u4f53\u9593\u306e\u96fb\u5834\u3068\u96fb\u675f\u5bc6\u5ea6\u306e\u632f\u308b\u821e\u3044\u306b\u7126\u70b9\u3092\u5f53\u3066\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6 | \u6982\u8981\u3068\u89e3\u6790\u65b9\u6cd5<\/h2>\n

\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6\u306f\u3001\u96fb\u78c1\u6c17\u5b66\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u6982\u5ff5\u3067\u3001\u7570\u306a\u308b\u8a98\u96fb\u4f53\u306e\u5883\u754c\u306b\u304a\u3051\u308b\u96fb\u5834\u3068\u96fb\u675f\u5bc6\u5ea6\u306e\u632f\u308b\u821e\u3044\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u3053\u306e\u30c6\u30fc\u30de\u306b\u3064\u3044\u3066\u3001\u57fa\u672c\u7684\u306a\u7406\u8ad6\u3068\u89e3\u6790\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n

\u8a98\u96fb\u4f53\u306e\u57fa\u790e<\/h2>\n

\u8a98\u96fb\u4f53\u3068\u306f\u3001\u5916\u90e8\u304b\u3089\u306e\u96fb\u5834\u304c\u52a0\u3048\u3089\u308c\u305f\u3068\u304d\u306b\u96fb\u6c17\u7684\u306b\u5206\u6975\u3059\u308b\u6750\u6599\u306e\u3053\u3068\u3067\u3059\u3002\u5206\u6975\u3068\u306f\u3001\u8a98\u96fb\u4f53\u5185\u90e8\u3067\u96fb\u8377\u304c\u308f\u305a\u304b\u306b\u79fb\u52d5\u3057\u3001\u6b63\u8ca0\u306e\u96fb\u8377\u304c\u5206\u96e2\u3059\u308b\u73fe\u8c61\u3067\u3059\u3002\u8a98\u96fb\u4f53\u306e\u4e3b\u306a\u7279\u6027\u306f\u3001\u305d\u306e\u8a98\u96fb\u7387 \\(\\epsilon\\) \u3067\u3059\u3002\u3053\u306e\u5024\u306f\u6750\u6599\u3054\u3068\u306b\u7570\u306a\u308a\u3001\u96fb\u5834\u306b\u5bfe\u3059\u308b\u5fdc\u7b54\u306e\u5ea6\u5408\u3044\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n

\u5883\u754c\u6761\u4ef6\u306e\u91cd\u8981\u6027<\/h2>\n

\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6\u306f\u3001\u7570\u306a\u308b\u8a98\u96fb\u4f53\u306e\u63a5\u5408\u90e8\u5206\u3067\u306e\u96fb\u5834 \\(\\mathbf{E}\\) \u3068\u96fb\u675f\u5bc6\u5ea6 \\(\\mathbf{D}\\) \u306e\u632f\u308b\u821e\u3044\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u6761\u4ef6\u306f\u3001\u96fb\u5834\u3068\u96fb\u675f\u5bc6\u5ea6\u306e\u9023\u7d9a\u6027\u3092\u78ba\u4fdd\u3057\u3001\u96fb\u5834\u306e\u6319\u52d5\u3092\u6b63\u78ba\u306b\u89e3\u6790\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u3067\u3059\u3002<\/p>\n

\u5c0e\u51fa\u65b9\u6cd5<\/h2>\n

\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6\u306f\u3001\u30de\u30af\u30b9\u30a6\u30a7\u30eb\u306e\u65b9\u7a0b\u5f0f\u304b\u3089\u5c0e\u51fa\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u4ee3\u8868\u7684\u306a\u5883\u754c\u6761\u4ef6\u306e\u5c0e\u51fa\u624b\u9806\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n

1. \u96fb\u5834\u306e\u5883\u754c\u6761\u4ef6<\/h3>\n

\u7570\u306a\u308b\u8a98\u96fb\u4f53\u306e\u5883\u754c\u306b\u304a\u3051\u308b\u96fb\u5834\u306e\u6cd5\u7dda\u6210\u5206 \\(E_n\\) \u306f\u4e0d\u9023\u7d9a\u306b\u306a\u308a\u3046\u308b\u304c\u3001\u63a5\u7dda\u6210\u5206 \\(E_t\\) \u306f\u9023\u7d9a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u6570\u5b66\u7684\u306b\u8868\u3059\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\\(
\n\\mathbf{E_{1t}} = \\mathbf{E_{2t}}
\n\\)<\/p>\n

\u3053\u3053\u3067\u3001\\(\\mathbf{E_{1t}}\\) \u306f\u5883\u754c\u306e\u7247\u5074\u306e\u8a98\u96fb\u4f531\u306e\u96fb\u5834\u306e\u63a5\u7dda\u6210\u5206\u3092\u8868\u3057\u3001\\(\\mathbf{E_{2t}}\\) \u306f\u3082\u3046\u7247\u5074\u306e\u8a98\u96fb\u4f532\u306e\u63a5\u7dda\u6210\u5206\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n

2. \u96fb\u675f\u5bc6\u5ea6\u306e\u5883\u754c\u6761\u4ef6<\/h3>\n

\u96fb\u675f\u5bc6\u5ea6\u306e\u6cd5\u7dda\u6210\u5206 \\(D_n\\) \u306f\u3001\u5883\u754c\u306b\u304a\u3051\u308b\u81ea\u7531\u96fb\u8377\u306e\u9762\u5bc6\u5ea6 \\(\\sigma_f\\) \u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002\u3053\u308c\u3092\u6570\u5b66\u7684\u306b\u8868\u3059\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\\(
\nD_{1n} – D_{2n} = \\sigma_f
\n\\)<\/p>\n

\u3053\u3053\u3067\u3001\\(\\mathbf{D_{1n}}\\) \u306f\u5883\u754c\u306e\u7247\u5074\u306e\u8a98\u96fb\u4f531\u306e\u96fb\u675f\u5bc6\u5ea6\u306e\u6cd5\u7dda\u6210\u5206\u3092\u8868\u3057\u3001\\(\\mathbf{D_{2n}}\\) \u306f\u3082\u3046\u7247\u5074\u306e\u8a98\u96fb\u4f532\u306e\u6cd5\u7dda\u6210\u5206\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n

\u89e3\u6790\u65b9\u6cd5<\/h2>\n

1. \u30ac\u30a6\u30b9\u306e\u6cd5\u5247\u306e\u5fdc\u7528<\/h3>\n

\u30ac\u30a6\u30b9\u306e\u6cd5\u5247\u3092\u4f7f\u7528\u3057\u3066\u3001\u8a98\u96fb\u4f53\u306e\u5883\u754c\u306b\u304a\u3051\u308b\u96fb\u5834\u3068\u96fb\u675f\u5bc6\u5ea6\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30ac\u30a6\u30b9\u306e\u6cd5\u5247\u306f\u6b21\u306e\u3088\u3046\u306b\u8868\u3055\u308c\u307e\u3059\u3002<\/p>\n

\\(
\n\\oint \\mathbf{D} \\cdot d\\mathbf{A} = Q_{free}
\n\\)<\/p>\n

\u3053\u306e\u6cd5\u5247\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5883\u754c\u6761\u4ef6\u3092\u6e80\u305f\u3059\u96fb\u5834\u3084\u96fb\u675f\u5bc6\u5ea6\u306e\u5206\u5e03\u3092\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

2. \u5883\u754c\u6761\u4ef6\u306e\u9069\u7528<\/h3>\n

\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6\u3092\u5177\u4f53\u7684\u306a\u554f\u984c\u306b\u9069\u7528\u3059\u308b\u969b\u306f\u3001\u307e\u305a\u5883\u754c\u306e\u72b6\u6cc1\u3092\u628a\u63e1\u3057\u3001\u30de\u30af\u30b9\u30a6\u30a7\u30eb\u306e\u65b9\u7a0b\u5f0f\u3092\u5229\u7528\u3057\u3066\u5883\u754c\u6761\u4ef6\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u8a98\u96fb\u4f53\u306e\u9023\u7d9a\u6027\u3068\u7269\u7406\u6cd5\u5247\u306b\u57fa\u3065\u3044\u3066\u96fb\u5834\u3068\u96fb\u675f\u5bc6\u5ea6\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\n

\u307e\u3068\u3081<\/h2>\n

\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6\u306f\u3001\u7570\u306a\u308b\u8a98\u96fb\u4f53\u9593\u306e\u96fb\u5834\u3068\u96fb\u675f\u5bc6\u5ea6\u306e\u6319\u52d5\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u6761\u4ef6\u306f\u3001\u30ac\u30a6\u30b9\u306e\u6cd5\u5247\u3092\u57fa\u306b\u5c0e\u51fa\u3055\u308c\u3001\u96fb\u5834\u306e\u9023\u7d9a\u6027\u3068\u7269\u7406\u6cd5\u5247\u306b\u57fa\u3065\u3044\u3066\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002\u6b63\u78ba\u306a\u89e3\u6790\u3092\u884c\u3046\u3053\u3068\u306b\u3088\u308a\u3001\u8a98\u96fb\u4f53\u306e\u7279\u6027\u3092\u3088\u308a\u6df1\u304f\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6\u306b\u3064\u3044\u3066\u306e\u6982\u8aac\u3068\u89e3\u6790\u65b9\u6cd5\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u8a98\u96fb\u4f53\u306e\u7279\u6027\u3084\u7570\u306a\u308b\u8a98\u96fb\u4f53\u9593\u306e\u96fb\u5834\u3068\u96fb\u675f\u5bc6\u5ea6\u306e\u632f\u308b\u821e\u3044\u306b\u7126\u70b9\u3092\u5f53\u3066\u3066\u3044\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-209271","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\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6 | \u6982\u8981\u3068\u89e3\u6790\u65b9\u6cd5<\/title>\n<meta name=\"description\" content=\"\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6\u306b\u3064\u3044\u3066\u306e\u6982\u8aac\u3068\u89e3\u6790\u65b9\u6cd5\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u8a98\u96fb\u4f53\u306e\u7279\u6027\u3084\u7570\u306a\u308b\u8a98\u96fb\u4f53\u9593\u306e\u96fb\u5834\u3068\u96fb\u675f\u5bc6\u5ea6\u306e\u632f\u308b\u821e\u3044\u306b\u7126\u70b9\u3092\u5f53\u3066\u3066\u3044\u307e\u3059\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\/%e8%aa%98%e9%9b%bb%e4%bd%93%e3%81%ae%e5%a2%83%e7%95%8c%e6%9d%a1%e4%bb%b6-%e6%a6%82%e8%a6%81%e3%81%a8%e8%a7%a3%e6%9e%90%e6%96%b9%e6%b3%95\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u8a98\u96fb\u4f53\u306e\u5883\u754c\u6761\u4ef6 | 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