{"id":212749,"date":"2024-10-21T21:19:21","date_gmt":"2024-10-21T21:19:21","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/?p=212749"},"modified":"2024-10-21T21:19:21","modified_gmt":"2024-10-21T21:19:21","slug":"%ea%b7%a0%ec%9d%bc%ed%95%98%ea%b2%8c-%eb%8c%80%ec%a0%84%eb%90%9c-%ec%9b%90%eb%b0%98%ec%97%90-%ec%9d%98%ed%95%9c-%ec%a0%84%ea%b8%b0%ec%9e%a5%ec%9d%84-%ec%96%b4%eb%96%bb%ea%b2%8c-%ea%b3%84%ec%82%b0","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ko\/%ea%b7%a0%ec%9d%bc%ed%95%98%ea%b2%8c-%eb%8c%80%ec%a0%84%eb%90%9c-%ec%9b%90%eb%b0%98%ec%97%90-%ec%9d%98%ed%95%9c-%ec%a0%84%ea%b8%b0%ec%9e%a5%ec%9d%84-%ec%96%b4%eb%96%bb%ea%b2%8c-%ea%b3%84%ec%82%b0\/","title":{"rendered":"\uade0\uc77c\ud558\uac8c \ub300\uc804\ub41c \uc6d0\ubc18\uc5d0 \uc758\ud55c \uc804\uae30\uc7a5\uc744 \uc5b4\ub5bb\uac8c \uacc4\uc0b0\ud560\uae4c\uc694?"},"content":{"rendered":"<p class=\"sidekick\">\uade0\uc77c\ud558\uac8c \ub300\uc804\ub41c \uc6d0\ubc18\uc5d0 \uc758\ud55c \uc804\uae30\uc7a5\uc744 \uacc4\uc0b0\ud558\ub294 \ubc29\ubc95\uc744 \uc54c\uc544\ubcf4\uace0 \ud544\uc694\ud55c \uacf5\uc2dd\uacfc \uac1c\ub150\uc744 \uc790\uc138\ud788 \uc124\uba85\ud569\ub2c8\ub2e4. \ubc30\uc6b0\uae30 \uc26c\uc6b4 \ub2e8\uacc4\ubcc4 \uac00\uc774\ub4dc.<\/p>\n<h2>\uade0\uc77c\ud558\uac8c \ub300\uc804\ub41c \uc6d0\ubc18\uc5d0 \uc758\ud55c \uc804\uae30\uc7a5\uc744 \uc5b4\ub5bb\uac8c \uacc4\uc0b0\ud560\uae4c\uc694?<\/h2>\n<p>\uc804\uae30\uc7a5\uc740 \uc804\ud558\uac00 \uc788\ub294 \uacf5\uac04 \uc8fc\uc704\uc5d0 \ud615\uc131\ub418\ub294 \ud798\uc758 \uc7a5\uc785\ub2c8\ub2e4. \uade0\uc77c\ud558\uac8c \ub300\uc804\ub41c \uc6d0\ubc18\uc5d0 \uc758\ud55c \uc804\uae30\uc7a5\uc744 \uacc4\uc0b0\ud558\ub294 \uac83\uc740 \uc804\uae30\uc5ed\ud559\uc5d0\uc11c \uc911\uc694\ud55c \ubb38\uc81c \uc911 \ud558\ub098\uc785\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \uade0\uc77c\ud558\uac8c \ub300\uc804\ub41c \uc6d0\ubc18\uc774 \uc0dd\uc131\ud558\ub294 \uc804\uae30\uc7a5\uc744 \uacc4\uc0b0\ud558\ub294 \ubc29\ubc95\uc744 \ub2e8\uacc4\ubcc4\ub85c \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>1. \ubb38\uc81c \uc124\uc815<\/h2>\n<p>\uba3c\uc800 \uade0\uc77c\ud558\uac8c \ub300\uc804\ub41c \uc6d0\ubc18\uc744 \ud2b9\uc815\ud569\ub2c8\ub2e4. \uc6d0\ubc18\uc758 \ubc18\uc9c0\ub984\uc744 <i>a<\/i>, \uc804\uccb4 \ub300\uc804\ub7c9\uc744 <i>Q<\/i>\ub77c\uace0 \uac00\uc815\ud569\ub2c8\ub2e4. \uc804\ud558\uac00 \uade0\uc77c\ud558\uac8c \ubd84\ud3ec\ub418\uc5b4 \uc788\uae30 \ub54c\ubb38\uc5d0 \ud45c\uba74 \uc804\ud558 \ubc00\ub3c4 <i>\u03c3<\/i>\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc815\uc758\ub429\ub2c8\ub2e4:<\/p>\n<p><i>\u03c3 = \\frac{Q}{\u03c0a^2}<\/i><\/p>\n<p>\uc774\uc81c \uc6b0\ub9ac\uac00 \uc6d0\ud558\ub294 \ubaa9\ud45c\ub294 \uc6d0\ubc18\uc758 \uc911\uc2ec\uc5d0\uc11c <i>z<\/i> \uac70\ub9ac\ub9cc\ud07c \ub5a8\uc5b4\uc9c4 \ucd95\uc0c1\uc758 \ud55c \uc810\uc5d0\uc11c\uc758 \uc804\uae30\uc7a5\uc744 \ucc3e\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<h2>2. \uc804\uae30\uc7a5 \uacc4\uc0b0<\/h2>\n<p>\uc804\uae30\uc7a5\uc744 \uacc4\uc0b0\ud558\uae30 \uc704\ud574 \uc6b0\ub9ac\ub294 \uace0\uc804 \uc804\uc790\uae30\ud559\uc5d0\uc11c \ud754\ud788 \uc0ac\uc6a9\ud558\ub294 \ub300\uce6d\uc131\uacfc \uc801\ubd84 \uae30\uc220\uc744 \uc0ac\uc6a9\ud560 \uac83\uc785\ub2c8\ub2e4. \uc6d0\ubc18\uc758 \ubbf8\uc18c \uba74\uc801 \uc694\uc18c\ub97c \uace0\ub824\ud558\uc5ec \uac01 \uc694\uc18c\uac00 \uc0dd\uc131\ud558\ub294 \uc804\uae30\uc7a5\uc744 \uc801\ubd84\ud558\uc5ec \uc804\uccb4 \uc804\uae30\uc7a5\uc744 \uacc4\uc0b0\ud569\ub2c8\ub2e4.<\/p>\n<h2>\ub2e8\uacc4 1: \ubbf8\uc18c \uc804\uae30\uc7a5 \uc694\uc18c \uad6c\ud558\uae30<\/h2>\n<p>\uc6d0\ubc18 \uc704\uc758 \uc791\uc740 \uba74\uc801 \uc694\uc18c <i>dA<\/i>\uc5d0 \ub300\ud55c \uc804\uae30\uc7a5\uc744 \uacc4\uc0b0\ud569\ub2c8\ub2e4. \uba74\uc801 \uc694\uc18c <i>dA<\/i>\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \ud45c\ud604\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<p><i>dA = r dr d\u03b8<\/i><\/p>\n<p>\uc5ec\uae30\uc11c <i>r<\/i>\uc740 \uc6d0\ubc18 \uc911\uc2ec\uc5d0\uc11c \uba74\uc801 \uc694\uc18c\uae4c\uc9c0\uc758 \uac70\ub9ac, <i>\u03b8<\/i>\ub294 \uc911\uc2ec\uc5d0\uc11c \uce21\uc815\ud55c \uac01\ub3c4\uc785\ub2c8\ub2e4. \uc774 \uba74\uc801 \uc694\uc18c\uc5d0 \uc758\ud55c \ubbf8\uc18c \uc804\uae30\uc7a5 <i>dE<\/i>\ub294 \ucfe8\ub871 \ubc95\uce59\uc5d0 \uc758\ud574 \uc8fc\uc5b4\uc9d1\ub2c8\ub2e4:<\/p>\n<p><i>dE = \\frac{1}{4\u03c0\u03b5_0} \\frac{\u03c3 dA}{(r^2 + z^2)}<\/i><\/p>\n<h2>\ub2e8\uacc4 2: \ucd95\uc0c1 \uc131\ubd84 \uad6c\ud558\uae30<\/h2>\n<p>\uc804\uae30\uc7a5\uc740 \ucd95\uc5d0 \uc218\uc9c1\uc778 \uc131\ubd84\uacfc \ucd95\uc5d0 \ud3c9\ud589\uc778 \uc131\ubd84\uc73c\ub85c \ub098\ub269\ub2c8\ub2e4. \ucd95\uc0c1 \uc131\ubd84\ub9cc\uc744 \uace0\ub824\ud558\uae30 \uc704\ud574, \uac01 \uc694\uc18c\uac00 \uc0dd\uc131\ud558\ub294 \uc804\uae30\uc7a5\uc758 \ucd95\uc0c1 \uc131\ubd84\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<p><i>dE_z = dE \\cos \u03b8<\/i><\/p>\n<p>\uc5ec\uae30\uc11c <i>cos \u03b8 = \\frac{z}{\\sqrt{r^2 + z^2}}<\/i>\uc785\ub2c8\ub2e4. \ub530\ub77c\uc11c, \ucd95\uc0c1 \ubbf8\uc18c \uc804\uae30\uc7a5\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \ub429\ub2c8\ub2e4:<\/p>\n<p><i>dE_z = \\frac{1}{4\u03c0\u03b5_0} \\frac{\u03c3 r dr d\u03b8 z}{(r^2 + z^2)^{3\/2}}<\/i><\/p>\n<h2>\ub2e8\uacc4 3: \uc801\ubd84\uc744 \ud1b5\ud55c \uc804\uccb4 \uc804\uae30\uc7a5 \uad6c\ud558\uae30<\/h2>\n<p>\uc774\uc81c \ucd95\uc0c1 \uc804\uae30\uc7a5\uc744 \uacc4\uc0b0\ud558\uae30 \uc704\ud574 \ubaa8\ub4e0 \ubbf8\uc18c \uc804\uae30\uc7a5\uc744 \uc801\ubd84\ud569\ub2c8\ub2e4. \uc801\ubd84\uc740 \uc6d0\ubc18\uc758 \uc804\uccb4 \ubc18\uc9c0\ub984\uacfc \uac01\ub3c4\uc5d0 \ub300\ud574 \uc218\ud589\ub429\ub2c8\ub2e4. \ub530\ub77c\uc11c \uc804\uae30\uc7a5\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<p><i>E_z = \\int_{0}^{2\u03c0} \\int_{0}^{a} \\frac{1}{4\u03c0\u03b5_0} \\frac{\u03c3 r z dr d\u03b8}{(r^2 + z^2)^{3\/2}}<\/i><\/p>\n<p>\uc801\ubd84\uc744 \uc2e4\ud589\ud558\uba74 \uac01\ub3c4\uc5d0 \ub300\ud55c \uc801\ubd84\uc740 \uac04\ub2e8\ud788 <i>2\u03c0<\/i>\uac00 \ub429\ub2c8\ub2e4. \ub530\ub77c\uc11c \ucd5c\uc885 \uacb0\uacfc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<p><i>E_z = \\frac{\u03c3 z}{2\u03b5_0} \\int_{0}^{a} \\frac{r dr}{(r^2 + z^2)^{3\/2}}<\/i><\/p>\n<p>\uc774 \uc801\ubd84\uc744 \ud574\uacb0\ud558\uba74 \ucd5c\uc885 \uc804\uae30\uc7a5\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \ub098\ud0c0\ub0a9\ub2c8\ub2e4:<\/p>\n<p><i>E_z = \\frac{Q}{2\u03c0\u03b5_0 a^2} \\left(1 &#8211; \\frac{z}{\\sqrt{a^2 + z^2}}\\right)<\/i><\/p>\n<h2>\uacb0\ub860<\/h2>\n<p>\uc704\uc758 \uacfc\uc815\uc744 \ud1b5\ud574 \uade0\uc77c\ud558\uac8c \ub300\uc804\ub41c \uc6d0\ubc18\uc774 \uc0dd\uc131\ud558\ub294 \ucd95\uc0c1 \uc804\uae30\uc7a5\uc744 \uacc4\uc0b0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc744 \ud1b5\ud574 \uc5bb\uc740 \uacb0\uacfc\ub294 \uc804\uc790\uae30\ud559\uc758 \uae30\ubcf8 \uc6d0\ub9ac\ub97c \uc774\ud574\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub418\uba70, \ub2e4\uc591\ud55c \uc804\uae30\uc801 \ud658\uacbd\uc5d0\uc11c \uc804\uae30\uc7a5\uc744 \uc608\uce21\ud558\ub294 \ub370 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uade0\uc77c\ud558\uac8c \ub300\uc804\ub41c \uc6d0\ubc18\uc5d0 \uc758\ud55c \uc804\uae30\uc7a5\uc744 \uacc4\uc0b0\ud558\ub294 \ubc29\ubc95\uc744 \uc54c\uc544\ubcf4\uace0 \ud544\uc694\ud55c \uacf5\uc2dd\uacfc \uac1c\ub150\uc744 \uc790\uc138\ud788 \uc124\uba85\ud569\ub2c8\ub2e4. \ubc30\uc6b0\uae30 \uc26c\uc6b4 \ub2e8\uacc4\ubcc4 \uac00\uc774\ub4dc.<\/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":[101],"tags":[],"class_list":["post-212749","post","type-post","status-publish","format-standard","hentry","category-101","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 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\uade0\uc77c\ud558\uac8c \ub300\uc804\ub41c \uc6d0\ubc18\uc5d0 \uc758\ud55c \uc804\uae30\uc7a5\uc744 \uc5b4\ub5bb\uac8c \uacc4\uc0b0\ud560\uae4c\uc694?<\/title>\n<meta name=\"description\" content=\"\uade0\uc77c\ud558\uac8c \ub300\uc804\ub41c \uc6d0\ubc18\uc5d0 \uc758\ud55c \uc804\uae30\uc7a5\uc744 \uacc4\uc0b0\ud558\ub294 \ubc29\ubc95\uc744 \uc54c\uc544\ubcf4\uace0 \ud544\uc694\ud55c \uacf5\uc2dd\uacfc 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