{"id":8725,"date":"2009-10-05T12:35:00","date_gmt":"2009-10-05T12:35:00","guid":{"rendered":"http:\/\/melotopia.net\/b\/?p=8725"},"modified":"2009-10-05T12:35:00","modified_gmt":"2009-10-05T12:35:00","slug":"%ea%b5%ac%ed%98%95-%eb%8f%84%ec%b2%b4%ec%9d%98-%ec%a0%80%ed%95%ad%ea%b5%ac%ed%95%98%ea%b8%b0","status":"publish","type":"post","link":"http:\/\/melotopia.net\/b\/?p=8725","title":{"rendered":"\uad6c\ud615 \ub3c4\uccb4\uc758 \uc800\ud56d\uad6c\ud558\uae30"},"content":{"rendered":"<div class=\"desc\">\n        \ud559\ubd80 \uc804\uc790\uae30\ud559 \uc5f0\uc2b5\ubb38\uc81c\ub85c \uc790\uc8fc \ub098\uc624\uace0 \ub610\ud55c \ubb3c\ub9ac\ud559\uacfc 2\ud559\ub144 \uc911\uac04\uace0\uc0ac\/\uae30\ub9d0\uace0\uc0ac \uc2dc\ud5d8\ubb38\uc81c\ub85c\ub3c4 \ud754\ud788 \ub098\uc624\ub294 \ubc14\ub85c \uadf8 \ubb38\uc81c\ub2e4.<\/p>\n<p>        \ubc18\uc9c0\ub984 b\uc778 \ub3c4\uccb4\uad6c(conducting sphere)\uac00 \uc788\ub294\ub370, \uac00\uc6b4\ub370 \ubc18\uc9c0\ub984 a\uc778 \uad6c\ud615 \uad6c\uba4d\uc774 \ub6ab\ub824\uc788\ub2e4. \ubb3c\ub860 \ub450 \uad6c\ub294 \uc911\uc2ec\uc774 \uac19\uc740 \uc704\uce58\uc5d0 \uc788\ub2e4.<\/p>\n<p>        \uc804\uae30 \uc804\ub3c4\ub3c4\ub97c g\ub77c\uace0 \ud558\uba74, \uc548\ucabd\uc5d0\uc11c \ubc14\uae65\ucabd\uc73c\ub85c \ud750\ub974\ub294 \uc804\ub958\uc5d0 \ub300\ud574 \uc774 \uad6c\uba4d\ub09c \ub3c4\uccb4\uad6c\uc758 \uc800\ud56d\uc740 \uc5bc\ub9c8\uc77c\uae4c?<\/p>\n<p>        \ub3c4\ub300\uccb4 \uc5bc\ub9c8\uc77c\uae4c.<\/p>\n<p>        \uc774 \ubb38\uc81c\uc758 \ubaa8\ubc94\uc801\uc778 \ud574\uc124\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4. (\uc544\ub9c8\ub3c4.)<\/p>\n<p>        \ub300\ub7b5, \uc774 \ubb38\uc81c\uc5d0\uc11c \ud480\uc5b4\uc57c \ud560 \uc601\uc5ed\uc778 \ubc18\uc9c0\ub984\uc774 a\ubd80\ud130 b\uae4c\uc9c0\uc778 \uc601\uc5ed\uc5d0\ub294 \uc804\ud558\uac00 \uc5c6\uc73c\ub2c8\uae4c, \ud478\uc544\uc1a1 \ubc29\uc815\uc2dd\uc744 \ub2e4 \ud480 \ud544\uc694 \uc5c6\uc774 \ud3ec\ud150\uc15c\uc5d0 \ub300\ud55c \ub77c\ud50c\ub77c\uc2a4 \ubc29\uc815\uc2dd\uc744 \uc4f0\uba74 \ub41c\ub2e4. \uadf8\uac83\ub3c4, \ubc29\ud5a5\uc5d0 \ub300\ud574\uc11c \ub4f1\ubc29(isotropic)\uc774\ubbc0\ub85c \ub2e4\ub978 \ud56d\uc740 \ub2e4 \ubb34\uc2dc\ud558\uace0 \ubc18\uc9c0\ub984\uc5d0 \uad00\ub828\ub41c \ubd80\ubd84\ub9cc \ud480\uba74 \ub41c\ub2e4. \uadf8\ub7fc \ud3b8\ubbf8\ubd84 \ubc29\uc815\uc2dd\ub3c4 \uc0c1\ubbf8\ubd84 \ubc29\uc815\uc2dd\uc73c\ub85c \ubc14\uafc0 \uc218 \uc788\ub2e4. \uc5b4\uca0c\ub4e0, \ud3ec\ud150\uc15c\uc5d0 \ub300\ud55c \ub77c\ud50c\ub77c\uc2a4 \ubc29\uc815\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<p>        $(d(r^2(d\\phi\/dr)\/dr)\/r^2 = 0$<\/p>\n<p>        \ubc14\uae65\uc5d0 \uc788\ub294 \uc801\ubd84 \ud558\ub098\ub294 \uadf8\ub0e5 \ud574\ubc84\ub9ac\uace0, \uadf8 \uc801\ubd84\uc0c1\uc218\ub97c A\ub77c\uace0 \ud558\uc790. $\\phi$\ub97c \uad6c\ud558\uae30 \uc704\ud574\uc11c \uc801\ubd84\ud574\uc57c \ud560 \ud568\uc218\ub294<br \/>\n        <br \/>\n        $-\\int_a^b A\/r^2 dr = V$<br \/>\n        <br \/>\n        \uc774\ub807\uac8c \ub41c\ub2e4. \uc5ec\uae30\uc11c -\ub791 V\uac00 \ubd99\uc740 \uc774\uc720\ub294, \uc804\uae30\uc7a5\uc744 \uc801\ubd84\ud558\uba74 \ud3ec\ud150\uc15c\uc774 \ub098\uc624\ub294\ub370 \uc804\uae30\uc7a5\uacfc \ud3ec\ud150\uc15c\uc740 \uadf8 \uc815\uc758\uc5d0 -\uac00 \ubd99\uc5b4 \uc788\uae30 \ub54c\ubb38\uc5d0\uace0, V\ub294 \uadf8\ub0e5 \ub450 \uc9c0\uc810 a\uc640 b\uc0ac\uc774\uc5d0 \uac78\ub9b0 \uc804\uc704\ucc28\uc774\uac00 V\ub77c\uace0 \ud558\uace0 \uc2f6\uae30 \ub54c\ubb38\uc774\ub2e4. \uadf8\ub807\ub2e4 \uce58\uace0, \uc801\ubd84\ud558\uc790. \uadf8\ub7fc A\ub97c \uad6c\ud560 \uc218 \uc788\ub2e4.<br \/>\n        <br \/>\n        $A=\\frac{ab}{a-b}V$<br \/>\n        <br \/>\n        \uadf8\ub7fc \ud3ec\ud150\uc15c\uc744 \uad6c\ud560 \uc218 \uc788\ub2e4.<br \/>\n        <br \/>\n        $\\phi = \\frac{ab}{a-b}V\\frac{1}{r}$<br \/>\n        <br \/>\n        \ubbf8\ubd84\ud558\uace0 -\ub97c \ubd99\uc774\uc790. \uadf8\ub7fc \uc804\uae30\uc7a5\uc774 \ub098\uc628\ub2e4.<br \/>\n        <br \/>\n        $E=\\frac{ab}{a-b}V\\frac{1}{r^2}$<br \/>\n        <br \/>\n        \uadf8\ub798\ubd10\uc57c \ubd84\ubaa8\uc5d0 r\uc774 \ud558\ub098 \ub354 \ubd99\uc740 \uc815\ub3c4\uc9c0\ub9cc.<\/p>\n<p>        \uc774\uc81c, \uc634\uc758 \ubc95\uce59\uc744 \ud480\uae30 \uc704\ud55c \ub610\ub2e4\ub978 \uc7ac\ub8cc\uc778 \uc804\ub958\ub97c \uad6c\ud574\ubcf4\uc790. \uc804\ub958\ub294 \ubb50 \uade0\uc77c\ud558\uac8c \ud750\ub978\ub2e4 \uce58\uace0, \ub300\ucda9 \uba74\uc801\ubd84\uc744 \ud558\uc790.<br \/>\n        <br \/>\n        $I=\\int J \\cdot dS$<br \/>\n        <br \/>\n        \uc800\uae30\uc11c dS\ub294 \ub098\uac00\ub294 \ubc29\ud5a5\uc758 \uba74\uc801\ubca1\ud130\uc774\uace0, J\ub294 \ub2e8\uc704\uba74\uc801\ub2f9 \uc804\ub958\ubc00\ub3c4\uc774\ub2e4. \uc554\uc0b0\uc73c\ub85c \uc801\ub2f9\ud788 \uacc4\uc0b0\ud558\uba74<br \/>\n        <br \/>\n        $I=4\\pi r^2 J$<br \/>\n        <br \/>\n        \uc774\uc81c, \uc6d0\ub798 J=gE\ub77c\ub294 \uc634\uc758 \ubc95\uce59\uc744 \uc801\uc6a9\ud558\uc790.<br \/>\n        <br \/>\n        $\\frac{I}{4\\pi r^2} = g\\frac{ab}{a-b}V\\frac{1}{r^2}$<br \/>\n        <br \/>\n        \uc774\uc81c, \uc800\ud56d R=V\/I\ub2c8\uae4c \ub2f5\uc774 \ub098\uc628\ub2e4.<br \/>\n        <br \/>\n        $R=\\frac{1}{g}\\frac{1}{4\\pi}(\\frac{1}{a}-\\frac{1}{b})$<\/p>\n<p>        \uac04\ub2e8\ud558\uac8c \uacc4\uc0b0\ud574 \ubcf4\uc558\ub294\ub370, \uc774 \ubb38\uc81c\ub97c \ub2e4\uc74c\uacfc \uac19\uc774 \ubc14\uafb8\uba74 \uac11\uc790\uae30 \uc5b4\ub824\uc6cc\uc9c4\ub2e4.<\/p>\n<p>        1. \uc548\ucabd\uc5d0 \ub6ab\ub9b0 \uad6c\uba4d\uc774 \uc911\uc2ec\uc5d0\uc11c d\ub9cc\ud07c \ubc97\uc5b4\ub098 \uc788\ub2e4\uba74?<br \/>\n        <br \/>\n        2. \uc804\ub958\uac00 \ud750\ub974\ub294 \ubc29\ud5a5\uc774 \ub0a8\uadf9\uc5d0\uc11c \ubd81\uadf9\uc774\ub77c\uba74?<\/p>\n<p>        \ub2f5\uc740 \ub098\ub3c4 \ubaa8\ub984. (\uacc4\uc0b0 \uc548\ud574\ubd10\uc11c&#8230;)<br \/>\n        <\/p>\n<div style=\"width:100%;margin-top:30px;clear:both;height:30px\">\n<div style=\"width:31px;float:left;\">\n<a href=\"\/toolbar\/popup\/abuseReport\/?entryId=1542\" onclick=\"window.open(this.href, 'tistoryThisBlogPopup', 'width=550, height=510, toolbar=no, menubar=no, status=no, scrollbars=no'); return false;\"><br \/>\n<img data-recalc-dims=\"1\" decoding=\"async\" alt=\"\uc2e0\uace0\" src=\"https:\/\/i0.wp.com\/t1.daumcdn.net\/tistory_admin\/static\/ico\/ico_spam_report.png\" style=\"border:0\"\/><br \/>\n<\/a>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\ud559\ubd80 \uc804\uc790\uae30\ud559 \uc5f0\uc2b5\ubb38\uc81c\ub85c \uc790\uc8fc \ub098\uc624\uace0 \ub610\ud55c \ubb3c\ub9ac\ud559\uacfc 2\ud559\ub144 \uc911\uac04\uace0\uc0ac\/\uae30\ub9d0\uace0\uc0ac \uc2dc\ud5d8\ubb38\uc81c\ub85c\ub3c4 \ud754\ud788 \ub098\uc624\ub294 \ubc14\ub85c \uadf8 \ubb38\uc81c\ub2e4. \ubc18\uc9c0\ub984 b\uc778 \ub3c4\uccb4\uad6c(conducting sphere)\uac00 \uc788\ub294\ub370, \uac00\uc6b4\ub370 \ubc18\uc9c0\ub984 a\uc778 \uad6c\ud615 \uad6c\uba4d\uc774 \ub6ab\ub824\uc788\ub2e4. \ubb3c\ub860 \ub450 \uad6c\ub294 \uc911\uc2ec\uc774 \uac19\uc740 \uc704\uce58\uc5d0 \uc788\ub2e4. \uc804\uae30 \uc804\ub3c4\ub3c4\ub97c g\ub77c\uace0 \ud558\uba74, \uc548\ucabd\uc5d0\uc11c \ubc14\uae65\ucabd\uc73c\ub85c \ud750\ub974\ub294 \uc804\ub958\uc5d0 \ub300\ud574 \uc774 \uad6c\uba4d\ub09c \ub3c4\uccb4\uad6c\uc758 \uc800\ud56d\uc740 \uc5bc\ub9c8\uc77c\uae4c? \ub3c4\ub300\uccb4 \uc5bc\ub9c8\uc77c\uae4c. \uc774 \ubb38\uc81c\uc758 \ubaa8\ubc94\uc801\uc778 \ud574\uc124\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-8725","post","type-post","status-publish","format-standard","hentry","category-academic"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8o6gA-2gJ","jetpack-related-posts":[],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/8725","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8725"}],"version-history":[{"count":0,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/8725\/revisions"}],"wp:attachment":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8725"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8725"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8725"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}