{"id":209266,"date":"2024-03-21T14:06:59","date_gmt":"2024-03-21T14:06:59","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e9%9b%bb%e5%a0%b4%e7%b7%9a%e5%af%86%e5%ba%a6%e3%81%ae%e5%85%ac%e5%bc%8f-%e5%ae%9a%e7%be%a9%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95%e3%80%81%e5%bf%9c%e7%94%a8\/"},"modified":"2024-05-17T15:09:44","modified_gmt":"2024-05-17T15:09:44","slug":"%e9%9b%bb%e5%a0%b4%e7%b7%9a%e5%af%86%e5%ba%a6%e3%81%ae%e5%85%ac%e5%bc%8f-%e5%ae%9a%e7%be%a9%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95%e3%80%81%e5%bf%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e9%9b%bb%e5%a0%b4%e7%b7%9a%e5%af%86%e5%ba%a6%e3%81%ae%e5%85%ac%e5%bc%8f-%e5%ae%9a%e7%be%a9%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95%e3%80%81%e5%bf%9c%e7%94%a8\/","title":{"rendered":"\u96fb\u5834\u7dda\u5bc6\u5ea6\u306e\u516c\u5f0f | \u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5fdc\u7528"},"content":{"rendered":"<p class=\"sidekick\">\u96fb\u5834\u7dda\u5bc6\u5ea6\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5fdc\u7528\u306b\u3064\u3044\u3066\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u96fb\u5834\u306e\u5f37\u3055\u3092\u8996\u899a\u7684\u306b\u793a\u3057\u3001\u30b3\u30f3\u30c7\u30f3\u30b5\u8a2d\u8a08\u3084\u9759\u96fb\u6c17\u9632\u6b62\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<h2>\u96fb\u5834\u7dda\u5bc6\u5ea6\u306e\u516c\u5f0f | \u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5fdc\u7528<\/h2>\n<p>\u96fb\u5834\u7dda\u5bc6\u5ea6\uff08Electric Field Line Density\uff09\u306f\u3001\u96fb\u5834\u306e\u5f37\u3055\u3068\u305d\u306e\u5f71\u97ff\u7bc4\u56f2\u3092\u8996\u899a\u7684\u306b\u793a\u3059\u305f\u3081\u306e\u6982\u5ff5\u3067\u3059\u3002\u96fb\u5834\u7dda\u5bc6\u5ea6\u306f\u7279\u5b9a\u306e\u9818\u57df\u5185\u306e\u96fb\u5834\u306e\u5f37\u3055\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u96fb\u5834\u7dda\u5bc6\u5ea6\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u305d\u3057\u3066\u305d\u306e\u5fdc\u7528\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>\u96fb\u5834\u7dda\u5bc6\u5ea6\u306e\u5b9a\u7fa9<\/h2>\n<p>\u96fb\u5834\u7dda\u5bc6\u5ea6\u3068\u306f\u3001\u96fb\u5834\u306e\u5f37\u3055\u3092\u8868\u3059\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u6307\u6a19\u3067\u3042\u308a\u3001\u5358\u4f4d\u9762\u7a4d\u3042\u305f\u308a\u306e\u96fb\u5834\u7dda\u306e\u6570\u3092\u793a\u3057\u307e\u3059\u3002\u96fb\u5834\u7dda\u306f\u96fb\u8377\u306e\u5468\u308a\u306b\u5f62\u6210\u3055\u308c\u3001\u6b63\u306e\u96fb\u8377\u304b\u3089\u653e\u5c04\u3055\u308c\u8ca0\u306e\u96fb\u8377\u3078\u3068\u5411\u304b\u3044\u307e\u3059\u3002<\/p>\n<h2>\u96fb\u5834\u7dda\u5bc6\u5ea6\u306e\u8a08\u7b97\u65b9\u6cd5<\/h2>\n<p>\u96fb\u5834\u7dda\u5bc6\u5ea6\u3092\u8a08\u7b97\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u516c\u5f0f\u3092\u4f7f\u7528\u3057\u307e\u3059\uff1a<\/p>\n<p>$$<br \/>\nD = \\frac{Q}{A}<br \/>\n$$<\/p>\n<p>\u3053\u3053\u3067\u3001<\/p>\n<ul>\n<li><b>D<\/b>\uff1a\u96fb\u5834\u7dda\u5bc6\u5ea6\uff08\u901a\u5e38\u3001\u5358\u4f4d\u306f\u672c\/\u5e73\u65b9\u30e1\u30fc\u30c8\u30eb\uff09<\/li>\n<li><b>Q<\/b>\uff1a\u96fb\u8377\u91cf\uff08\u30af\u30fc\u30ed\u30f3\u3001C\uff09<\/li>\n<li><b>A<\/b>\uff1a\u8003\u616e\u3059\u308b\u9762\u7a4d\uff08\u5e73\u65b9\u30e1\u30fc\u30c8\u30eb\u3001m\u00b2\uff09<\/li>\n<\/ul>\n<p>\u5b9f\u969b\u306e\u96fb\u5834\uff08<i>E<\/i>\uff09\u3068\u306e\u95a2\u4fc2\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n<p>$$<br \/>\nE = \\frac{D}{\\varepsilon_0}<br \/>\n$$<\/p>\n<p>\u3053\u3053\u3067\u3001<\/p>\n<ul>\n<li><b>E<\/b>\uff1a\u96fb\u5834\u306e\u5f37\u3055\uff08\u30dc\u30eb\u30c8\/\u30e1\u30fc\u30c8\u30eb\u3001V\/m\uff09<\/li>\n<li><b>\\varepsilon_0<\/b>\uff1a\u771f\u7a7a\u306e\u8a98\u96fb\u7387\uff08\u7d04 8.854 \u00d7 10\u207b\u00b9\u00b2 F\/m\uff09<\/li>\n<\/ul>\n<h2>\u96fb\u5834\u7dda\u5bc6\u5ea6\u306e\u5fdc\u7528<\/h2>\n<p>\u96fb\u5834\u7dda\u5bc6\u5ea6\u306e\u6982\u5ff5\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u5fdc\u7528\u5206\u91ce\u3067\u5f79\u7acb\u3061\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3044\u304f\u3064\u304b\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n<h3>1. \u30b3\u30f3\u30c7\u30f3\u30b5\u306e\u8a2d\u8a08<\/h3>\n<p>\u30b3\u30f3\u30c7\u30f3\u30b5\u306f\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u3092\u84c4\u3048\u308b\u305f\u3081\u306e\u96fb\u5b50\u90e8\u54c1\u3067\u3042\u308a\u3001\u305d\u306e\u6027\u80fd\u306f\u96fb\u5834\u306e\u5f37\u3055\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002\u96fb\u5834\u7dda\u5bc6\u5ea6\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u3067\u3001\u9069\u5207\u306a\u6750\u6599\u3068\u5bf8\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>2. \u9759\u96fb\u6c17\u9632\u6b62<\/h3>\n<p>\u96fb\u5834\u7dda\u5bc6\u5ea6\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u9759\u96fb\u6c17\u306e\u84c4\u7a4d\u3092\u9632\u3050\u305f\u3081\u306e\u9069\u5207\u306a\u8a2d\u8a08\u304c\u53ef\u80fd\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u96fb\u5b50\u6a5f\u5668\u3092\u9759\u96fb\u6c17\u304b\u3089\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306b\u3001\u9069\u5207\u306a\u6750\u8cea\u3092\u7528\u3044\u305f\u30b7\u30fc\u30eb\u30c9\u3092\u8a2d\u8a08\u3059\u308b\u969b\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<h3>3. 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