{"id":148738,"date":"2024-04-27T18:02:06","date_gmt":"2024-04-27T18:02:06","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%ec%9e%90%ea%b8%b0-%ec%8a%a4%ed%8a%b8%eb%9d%bc%ec%9d%b4%ed%94%84-%eb%a6%ac%eb%8d%94\/"},"modified":"2024-04-27T18:02:06","modified_gmt":"2024-04-27T18:02:06","slug":"%ec%9e%90%ea%b8%b0-%ec%8a%a4%ed%8a%b8%eb%9d%bc%ec%9d%b4%ed%94%84-%eb%a6%ac%eb%8d%94","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ko\/%ec%9e%90%ea%b8%b0-%ec%8a%a4%ed%8a%b8%eb%9d%bc%ec%9d%b4%ed%94%84-%eb%a6%ac%eb%8d%94\/","title":{"rendered":"\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \ub9ac\ub354"},"content":{"rendered":"<p class=\"sidekick\">\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \ub9ac\ub354\uc758 \uc6d0\ub9ac\uc640 \uad6c\uc870\ub97c \ud574\uc124\ud558\uba70, \uce74\ub4dc \uc815\ubcf4\uac00 \uc5b4\ub5bb\uac8c \uc77d\ud788\uace0 \uc804\uae30 \uc2e0\ud638\ub85c \ubcc0\ud658\ub418\ub294\uc9c0 \uc124\uba85\ud569\ub2c8\ub2e4.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2024\/04\/\uc790\uae30-\uc2a4\ud2b8\ub77c\uc774\ud504-\ub9ac\ub354.png\" alt=\"\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \ub9ac\ub354\"\/><\/p>\n<h2>\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \ub9ac\ub354\uc758 \uc6d0\ub9ac<\/h2>\n<p>\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \ub9ac\ub354(Magnetic stripe reader), \uc885\uc885 &#8216;\ub9c8\uadf8\uc2a4\ud2b8\ub77c\uc774\ud504 \ub9ac\ub354&#8217;\ub77c\uace0 \ubd88\ub9ac\ub294 \uc774 \uae30\uae30\ub294 \uc2e0\uc6a9\uce74\ub4dc\ub098 \uc9c1\ubd88\uce74\ub4dc, \uad50\ud1b5\uce74\ub4dc \ub4f1\uc758 \uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504\uc5d0 \uc800\uc7a5\ub41c \uc815\ubcf4\ub97c \uc77d\ub294 \uc7a5\uce58\uc785\ub2c8\ub2e4. \uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504\uc5d0\ub294 \uc791\uc740 \uc790\uc131 \uc785\uc790\ub4e4\uc774 \ud2b9\uc815 \ubc29\ud5a5\uc73c\ub85c \ubc30\uce58\ub418\uc5b4 \uc815\ubcf4\uac00 \uae30\ub85d\ub429\ub2c8\ub2e4. \uc774 \uc815\ubcf4\uc758 \ud328\ud134\uc744 \uac10\uc9c0\ud558\uc5ec \ub514\uc9c0\ud138 \uc2e0\ud638\ub85c \ubcc0\ud658\ud558\ub294 \uacfc\uc815\uc744 \ud1b5\ud574, \uce74\ub4dc\uc758 \uc815\ubcf4\uac00 \ucef4\ud4e8\ud130 \uc2dc\uc2a4\ud15c\uc5d0 \uc804\ub2ec\ub429\ub2c8\ub2e4.<\/p>\n<h2>\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504\uc758 \uad6c\uc870<\/h2>\n<p>\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504\ub294 \uc8fc\ub85c \uc138 \uac00\uc9c0 \ud2b8\ub799(Track)\uc73c\ub85c \uad6c\uc131\ub418\uc5b4 \uc788\uc73c\uba70, \uac01 \ud2b8\ub799\uc740 \ub2e4\ub978 \uc885\ub958\uc758 \uc815\ubcf4\ub97c \uc800\uc7a5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud2b8\ub799 1\uc740 \uc54c\ud30c\ubcb3\uacfc \uc22b\uc790\ub97c \ud3ec\ud568\ud55c \uc815\ubcf4\ub97c, \ud2b8\ub799 2\uc640 3\uc740 \uc22b\uc790\ub9cc\uc744 \uc800\uc7a5\ud569\ub2c8\ub2e4. \uc774\ub4e4\uc740 \uac01\uae30 \ub2e4\ub978 \ube44\ud2b8 \ubc00\ub3c4(bit density)\ub97c \uac00\uc9c0\uace0 \uc788\uc5b4, \uc800\uc7a5\ud560 \uc218 \uc788\ub294 \uc815\ubcf4\uc758 \uc591\uc774 \ub2e4\ub985\ub2c8\ub2e4.<\/p>\n<h2>\uc791\ub3d9 \uc6d0\ub9ac<\/h2>\n<p>\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \ub9ac\ub354\ub294 \uc804\uc790\uae30\ud559\uc758 \uc6d0\ub9ac\ub97c \uc774\uc6a9\ud569\ub2c8\ub2e4. \uce74\ub4dc\ub97c \uc2a4\uc640\uc774\ud504\ud560 \ub54c, \uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \uc0c1\uc758 \uc790\uc131 \uc785\uc790\uac00 \ub9ac\ub354 \ub0b4\ubd80\uc758 \uac10\uc751 \ucf54\uc77c(induction coil)\uc744 \uc9c0\ub098\uac08 \ub54c \uc774\ub97c \ud1b5\uacfc\ud558\ub294 \uc790\uae30\uc7a5\uc758 \ubcc0\ud654\uac00 \uc804\uae30\uc801 \uc2e0\ud638\ub85c \ubcc0\ud658\ub429\ub2c8\ub2e4. \uc774\ub294 \ud328\ub7ec\ub370\uc774\uc758 \uc804\uc790\uae30 \uc720\ub3c4 \ubc95\uce59(Faraday&#8217;s law of electromagnetic induction)\uc5d0 \ub530\ub978 \uac83\uc73c\ub85c, \ubcc0\ud654\ud558\ub294 \uc790\uae30\uc7a5\uc740 \uc804\ub3c4\uccb4\uc5d0 \uc804\uc555\uc744 \uc720\ub3c4\ud569\ub2c8\ub2e4.<\/p>\n<ul>\n<li>\ud2b8\ub799\ubcc4 \uc815\ubcf4 \uc800\uc7a5 \ubc29\uc2dd<\/li>\n<ul>\n<li>\ud2b8\ub799 1: \uc54c\ud30c\ubcb3\uacfc \uc22b\uc790 \uc815\ubcf4 (\uc57d 210 bpi &#8211; bits per inch)<\/li>\n<li>\ud2b8\ub799 2: \uc22b\uc790 \uc815\ubcf4 (\uc57d 75 bpi)<\/li>\n<li>\ud2b8\ub799 3: \uc22b\uc790 \uc815\ubcf4 (\uc57d 210 bpi)<\/li>\n<\/ul>\n<li>\uce74\ub4dc \uc2a4\uc640\uc774\ud504\uc2dc \uc2e0\ud638 \ubcc0\ud658<\/li>\n<ul>\n<li>\uc790\uc131 \uc785\uc790\uc758 \ubcc0\ud654 \u2192 \uac10\uc751 \ucf54\uc77c\uc758 \uc790\uae30\uc7a5 \ubcc0\ud654 \u2192 \uc804\uae30 \uc2e0\ud638 \ubcc0\ud658<\/li>\n<\/ul>\n<\/ul>\n<h2>\uc804\uae30 \uc2e0\ud638\uc758 \ub514\ucf54\ub529<\/h2>\n<p>\uc0dd\uc131\ub41c \uc804\uae30 \uc2e0\ud638\ub294 \uc544\ub0a0\ub85c\uadf8 \ud615\ud0dc\uc774\uba70, \ub514\uc9c0\ud138 \uc2e0\ud638\ub85c \ubcc0\ud658\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4. \uc774 \uacfc\uc815\uc5d0\uc11c \uc2e0\ud638\uc758 \uac15\ub3c4\uc640 \ud0c0\uc774\ubc0d\uc744 \ubd84\uc11d\ud558\uc5ec \uce74\ub4dc\uc5d0 \uc800\uc7a5\ub41c \uc2e4\uc81c \uc815\ubcf4, \uc608\ub97c \ub4e4\uc5b4 \uacc4\uc88c \ubc88\ud638\ub098 \uc0ac\uc6a9\uc790 \uc774\ub984 \ub4f1\uc744 \ub514\uc9c0\ud138 \ud615\ud0dc\ub85c \ubcc0\ud658\ud569\ub2c8\ub2e4.<\/p>\n<h2>\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504\uc758 \ubcf4\uc548<\/h2>\n<p>\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \uce74\ub4dc\ub294 \ube44\uad50\uc801 \uc27d\uac8c \ubcf5\uc81c\ub420 \uc218 \uc788\uc5b4 \ubcf4\uc548 \ubb38\uc81c\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub530\ub77c\uc11c \ucd5c\uadfc\uc5d0\ub294 \uce69\uc774 \ub0b4\uc7a5\ub41c \uc2a4\ub9c8\ud2b8 \uce74\ub4dc\ub098 \ube44\uc811\ucd09\uc2dd \uacb0\uc81c \uc2dc\uc2a4\ud15c \uac19\uc740 \ubcf4\uc548\uc131\uc774 \ub354 \ub192\uc740 \ub300\uccb4 \uae30\uc220\ub4e4\uc774 \ub110\ub9ac \uc0ac\uc6a9\ub418\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uc5ec\uc804\ud788 \ub9ce\uc740 \uacf3\uc5d0\uc11c \uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \uae30\uc220\uc774 \uc0ac\uc6a9\ub418\uace0 \uc788\uc5b4, \uc774\uc5d0 \ub300\ud55c \uc774\ud574\ub294 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p>\n<p>\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \ub9ac\ub354\uc640 \uad00\ub828\ub41c \uc804\uc790\uae30\ud559\uc758 \uae30\ubcf8 \uc6d0\ub9ac\ub97c \uc774\ud574\ud568\uc73c\ub85c\uc368, \uc6b0\ub9ac\ub294 \uc77c\uc0c1\uc0dd\ud65c \uc18d\uc758 \uae30\uc220\uc774 \uc5b4\ub5bb\uac8c \uc791\ub3d9\ud558\ub294\uc9c0 \uc870\uae08 \ub354 \uae4a\uc774 \uc778\uc2dd\ud560 \uc218 \uc788\uac8c \ub429\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc9c0\uc2dd\uc774 \ucd5c\uc2e0 \uae30\uc220\uc758 \ubc1c\uc804\uacfc \ud601\uc2e0\uc744 \ub354\uc6b1 \ud3ed\ub113\uac8c \uc774\ud574\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub420 \uac83\uc785\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \ub9ac\ub354\uc758 \uc6d0\ub9ac\uc640 \uad6c\uc870\ub97c \ud574\uc124\ud558\uba70, \uce74\ub4dc \uc815\ubcf4\uac00 \uc5b4\ub5bb\uac8c \uc77d\ud788\uace0 \uc804\uae30 \uc2e0\ud638\ub85c \ubcc0\ud658\ub418\ub294\uc9c0 \uc124\uba85\ud569\ub2c8\ub2e4.<\/p>\n","protected":false},"author":1,"featured_media":188274,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[88],"tags":[89],"class_list":["post-148738","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-88","tag-89","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>\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 \ub9ac\ub354 | \uc791\ub3d9 \ubc29\uc2dd, \uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8 \ubc0f \uc7a5\uc810<\/title>\n<meta name=\"description\" content=\"\uc790\uae30 \uc2a4\ud2b8\ub77c\uc774\ud504 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