{"id":6469,"date":"2018-12-10T07:35:39","date_gmt":"2018-12-10T07:35:39","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=6469"},"modified":"2024-07-03T16:20:41","modified_gmt":"2024-07-03T09:20:41","slug":"xem-bang-mau-dien-tro-theo-chuan-quoc-te","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=6469","title":{"rendered":"C\u00e1ch \u0111\u1ecdc gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Trong s\u1ed1 b\u00e0i vi\u1ebft tr\u01b0\u1edbc, HocvieniT.vn \u0111\u00e3 c\u00f9ng c\u00e1c b\u1ea1n \u0111\u01b0a ra \u0111\u01b0\u1ee3c v\u1ec1 \u0111\u1ecbnh ngh\u0129a \u0111i\u1ec7n tr\u1edf l\u00e0 g\u00ec c\u0169ng nh\u01b0 t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c lo\u1ea1i \u0111i\u1ec7n tr\u1edf ph\u1ed5 bi\u1ebfn. Ng\u00e0y h\u00f4m nay, ch\u00fang ta s\u1ebd ti\u1ebfp t\u1ee5c c\u00f9ng nhau nghi\u00ean c\u1ee9u v\u1ec1 b\u1ea3ng m\u00e0u \u0111i\u1ec7n tr\u1edf, t\u1eeb \u0111\u00f3 n\u1eafm \u0111\u01b0\u1ee3c c\u00e1ch \u0111\u1ecdc gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf.<\/span><\/p>\n<figure id=\"attachment_12591\" aria-describedby=\"caption-attachment-12591\" style=\"width: 750px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12591 size-full\" title=\"C\u00e1ch \u0111\u1ecdc gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf\" src=\"https:\/\/hocvienit.vn\/wp-content\/uploads\/2018\/12\/cach-doc-gia-tri-dien-tro-theo-tieu-chuan-quoc-te.jpg\" alt=\"C\u00e1ch \u0111\u1ecdc gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf\" width=\"750\" height=\"400\" srcset=\"https:\/\/hocvienit.vn\/wp-content\/uploads\/2018\/12\/cach-doc-gia-tri-dien-tro-theo-tieu-chuan-quoc-te.jpg 750w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2018\/12\/cach-doc-gia-tri-dien-tro-theo-tieu-chuan-quoc-te-510x272.jpg 510w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2018\/12\/cach-doc-gia-tri-dien-tro-theo-tieu-chuan-quoc-te-300x160.jpg 300w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2018\/12\/cach-doc-gia-tri-dien-tro-theo-tieu-chuan-quoc-te-600x320.jpg 600w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><figcaption id=\"caption-attachment-12591\" class=\"wp-caption-text\">C\u00e1ch \u0111\u1ecdc gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf<\/figcaption><\/figure>\n<h2 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110i\u1ec7n tr\u1edf l\u00e0 g\u00ec?<\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ch\u00fang ta s\u1ebd c\u00f9ng \u0111i\u1ec3m l\u1ea1i m\u1ed9t s\u1ed1 kh\u00e1i ni\u1ec7m <a href=\"https:\/\/hocvienit.vn\/dien-tro-la-gi-trong-mach-dien\/\" target=\"_blank\" rel=\"noopener\">c\u01a1 b\u1ea3n v\u1ec1 \u0111i\u1ec7n tr\u1edf<\/a> tr\u01b0\u1edbc khi \u0111i s\u00e2u v\u00e0o c\u00e1ch \u0111\u1ecdc \u0111i\u1ec7n tr\u1edf. \u0110i\u1ec7n tr\u1edf l\u00e0 g\u00ec? Hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, \u0111i\u1ec7n tr\u1edf l\u00e0 s\u1ef1 c\u1ea3n tr\u1edf <a href=\"https:\/\/hocvienit.vn\/dinh-nghia-dong-dien-va-cuong-do-dog-dien\/\" target=\"_blank\" rel=\"noopener\">d\u00f2ng \u0111i\u1ec7n<\/a> c\u1ee7a m\u1ed9t v\u1eadt d\u1eabn \u0111i\u1ec7n. N\u1ebfu m\u1ed9t v\u1eadt d\u1eabn \u0111i\u1ec7n t\u1ed1t th\u00ec \u0111i\u1ec7n tr\u1edf c\u1ee7a v\u1eadt \u0111\u00f3 nh\u1ecf. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu v\u1eadt d\u1eabn \u0111i\u1ec7n k\u00e9m th\u00ec \u0111i\u1ec7n tr\u1edf s\u1ebd l\u1edbn. V\u1eadt c\u00e1ch \u0111i\u1ec7n c\u00f3 \u0111i\u1ec7n tr\u1edf v\u00f4 c\u00f9ng l\u1edbn.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn l\u00e0 g\u00ec ph\u1ee5 thu\u1ed9c v\u00e0o ch\u1ea5t li\u1ec7u, \u0111\u1ed9 d\u00e0i v\u00e0 ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y. \u0110i\u1ec7n tr\u1edf \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c:<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>R = \u03c1.L \/ S<\/strong><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed, \u0111i\u1ec7n tr\u1edf l\u00e0 m\u1ed9t linh ki\u1ec7n quan tr\u1ecdng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb h\u1ee3p ch\u1ea5t cacbon v\u00e0 kim lo\u1ea1i. T\u00f9y thu\u1ed9c theo t\u1ef7 l\u1ec7 pha tr\u1ed9n m\u00e0 ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 t\u1ea1o ra \u0111\u01b0\u1ee3c c\u00e1c lo\u1ea1i \u0111i\u1ec7n tr\u1edf v\u1edbi tr\u1ecb s\u1ed1 kh\u00e1c nhau.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110\u01a1n v\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf l\u00e0 \u03a9 (Ohm) , K\u03a9 , M\u03a9<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00e1c \u0111i\u1ec7n tr\u1edf c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf \u0111\u01b0\u1ee3c ghi tr\u1ecb s\u1ed1 b\u1eb1ng c\u00e1c v\u1ea1ch m\u00e0u theo quy \u01b0\u1edbc chung c\u1ee7a th\u1ebf gi\u1edbi. C\u00e1c \u0111i\u1ec7n tr\u1edf c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n t\u1eeb 2WW tr\u1edf l\u00ean th\u01b0\u1eddng \u0111\u01b0\u1ee3c ghi tr\u1ecb s\u1ed1 tr\u1ef1c ti\u1ebfp tr\u00ean th\u00e2n. V\u00ed d\u1ee5 nh\u01b0 \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t, \u0111i\u1ec7n tr\u1edf s\u1ee9.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ph\u00e2n lo\u1ea1i \u0111i\u1ec7n tr\u1edf<\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00e1c \u0111i\u1ec7n tr\u1edf c\u00f3 gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a theo v\u1ea1ch m\u00e0u th\u00ec ch\u00fang ta c\u00f3 chia th\u00e0nh 3 lo\u1ea1i \u0111i\u1ec7n tr\u1edf: \u0110i\u1ec7n tr\u1edf 4 v\u1ea1ch m\u00e0u v\u00e0 \u0111i\u1ec7n tr\u1edf 5 v\u1ea1ch m\u00e0u v\u00e0 6 v\u1ea1ch m\u00e0u. Trong \u0111\u00f3, lo\u1ea1i \u0111i\u1ec7n tr\u1edf 4 v\u1ea1ch m\u00e0u v\u00e0 5 v\u1ea1ch m\u00e0u b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y tr\u00ean h\u00ecnh v\u1ebd. B\u1ea1n ch\u1ec9 c\u1ea7n ghi nh\u1edb r\u1eb1ng khi \u0111\u1ecdc c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf 5 v\u1ea1ch m\u00e0u v\u00e0 6 v\u1ea1ch m\u00e0u th\u00ec c\u1ea7n ph\u1ea3i \u0111\u1ec3 \u00fd k\u1ef9 b\u1edfi gi\u1eefa ch\u00fang c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t m\u1ed9t ch\u00fat v\u1ec1 c\u00e1c gi\u00e1 tr\u1ecb.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Do \u0111\u00f3, \u0111\u1ec3 tr\u00e1nh nh\u1ea7m l\u1eabn khi \u0111\u1ecdc c\u00e1c th\u00f4ng s\u1ed1 gi\u00e1 tr\u1ecb c\u1ee7a c\u00e1c \u0111i\u1ec7n tr\u1edf, c\u00e1c \u0111i\u1ec7n tr\u1edf c\u00f3 t\u1ed5ng s\u1ed1 c\u00e1c v\u00f2ng m\u00e0u t\u1eeb 5 tr\u1edf xu\u1ed1ng th\u00ec b\u1ea1n s\u1ebd kh\u00f4ng hay b\u1ecb nh\u1ea7m v\u00ec c\u00e1c v\u1ecb tr\u00ed m\u00e0 b\u1ecb tr\u1ed1ng s\u1ebd kh\u00f4ng c\u00f3 v\u00f2ng m\u00e0u v\u00e0 ch\u00fang \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf ph\u00eda tay b\u00ean ph\u1ea3i tr\u01b0\u1edbc khi b\u1ea1n \u0111\u1ecdc c\u00e1c th\u00f4ng s\u1ed1 gi\u00e1 tr\u1ecb.Ngo\u00e0i ra, v\u1edbi c\u00e1c \u0111i\u1ec7n tr\u1edf c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao v\u00e0 c\u00f3 th\u00eam tham s\u1ed1 thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9 th\u00ec b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y c\u00e1c v\u00f2ng m\u00e0u tham s\u1ed1 nhi\u1ec7t c\u00f3 chi\u1ec1u r\u1ed9ng l\u1edbn h\u01a1n v\u00e0 c\u0169ng \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp v\u1ec1 b\u00ean tay ph\u1ea3i tr\u01b0\u1edbc khi \u0111\u1ecdc c\u00e1c th\u00f4ng s\u1ed1 gi\u00e1 tr\u1ecb.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00e1ch \u0111\u1ecdc \u0111i\u1ec7n tr\u1edf theo v\u1ea1ch m\u00e0u<\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110\u01b0\u01a1ng nhi\u00ean b\u1ea1n c\u0169ng ph\u1ea3i bi\u1ebft r\u1eb1ng c\u00e1ch \u0111\u1ecdc \u0111i\u1ec7n tr\u1edf theo v\u1ea1ch m\u00e0u \u0111\u1ec1u d\u1ef1a v\u00e0o c\u00e1c gi\u00e1 tr\u1ecb m\u00e0u s\u1eafc \u0111\u01b0\u1ee3c ghi tr\u00ean \u0111i\u1ec7n tr\u1edf m\u00e0 \u0111\u1ecdc theo m\u1ed9t tr\u00ecnh t\u1ef1 nh\u1ea5t \u0111\u1ecbnh<\/span><\/p>\n<h3><\/h3>\n<h3 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110i\u1ec7n tr\u1edf 4 v\u1ea1ch m\u00e0u<\/span><\/h3>\n<p style=\"text-align: justify;\"><strong>V\u1ea1ch th\u1ee9 nh\u1ea5t<\/strong><span style=\"font-weight: 400;\">: l\u00e0 gi\u00e1 tr\u1ecb h\u00e0ng ch\u1ee5c trong gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>V\u1ea1ch th\u1ee9 hai:<\/strong><span style=\"font-weight: 400;\"> l\u00e0 gi\u00e1 tr\u1ecb h\u00e0ng \u0111\u01a1n v\u1ecb trong gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>V\u1ea1ch th\u1ee9 ba<\/strong><span style=\"font-weight: 400;\">: l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a h\u1ec7 s\u1ed1 nh\u00e2n v\u1edbi gi\u00e1 tr\u1ecb s\u1ed1 m\u0169 c\u1ee7a 10 r\u1ed3i nh\u00e2n v\u1edbi gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>V\u1ea1ch th\u1ee9 t\u01b0<\/strong><span style=\"font-weight: 400;\">: l\u00e0 gi\u00e1 tr\u1ecb sai s\u1ed1 c\u1ee7a \u0111i\u1ec7n tr\u1edf<\/span><\/p>\n<figure id=\"attachment_12593\" aria-describedby=\"caption-attachment-12593\" style=\"width: 750px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12593 size-full\" title=\"B\u1ea3ng gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf qua m\u00e3 m\u00e0u\" src=\"https:\/\/hocvienit.vn\/wp-content\/uploads\/2018\/12\/bang-gia-tri-dien-tro-qua-ma-mau.jpg\" alt=\"B\u1ea3ng gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf qua m\u00e3 m\u00e0u\" width=\"750\" height=\"400\" srcset=\"https:\/\/hocvienit.vn\/wp-content\/uploads\/2018\/12\/bang-gia-tri-dien-tro-qua-ma-mau.jpg 750w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2018\/12\/bang-gia-tri-dien-tro-qua-ma-mau-510x272.jpg 510w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2018\/12\/bang-gia-tri-dien-tro-qua-ma-mau-300x160.jpg 300w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2018\/12\/bang-gia-tri-dien-tro-qua-ma-mau-600x320.jpg 600w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><figcaption id=\"caption-attachment-12593\" class=\"wp-caption-text\">B\u1ea3ng gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf qua m\u00e3 m\u00e0u<\/figcaption><\/figure>\n<h3 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110i\u1ec7n tr\u1edf 5 v\u1ea1ch m\u00e0u<\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110i\u1ec7n tr\u1edf 5 v\u1ea1ch m\u00e0u t\u01b0\u01a1ng t\u1ef1 v\u1edbi \u0111i\u1ec7n tr\u1edf 4 v\u1ea1ch m\u00e0u v\u00e0 ch\u1ec9 th\u00eam m\u1ed9t v\u1ea1ch m\u00e0u \u1edf \u0111\u1ea7u:<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>V\u1ea1ch th\u1ee9 nh\u1ea5t<\/strong><span style=\"font-weight: 400;\">: l\u00e0 gi\u00e1 tr\u1ecb h\u00e0ng tr\u0103m trong gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>V\u1ea1ch th\u1ee9 hai<\/strong><span style=\"font-weight: 400;\">: l\u00e0 gi\u00e1 tr\u1ecb h\u00e0ng ch\u1ee5c trong gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>V\u1ea1ch th\u1ee9 ba<\/strong><span style=\"font-weight: 400;\">: l\u00e0 gi\u00e1 tr\u1ecb h\u00e0ng \u0111\u01a1n v\u1ecb trong gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>V\u1ea1ch th\u1ee9 t\u01b0<\/strong><span style=\"font-weight: 400;\">: l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a h\u1ec7 s\u1ed1 nh\u00e2n v\u1edbi gi\u00e1 tr\u1ecb s\u1ed1 m\u0169 c\u1ee7a 10 r\u1ed3i nh\u00e2n v\u1edbi gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>V\u1ea1ch th\u1ee9 n\u0103m<\/strong><span style=\"font-weight: 400;\">: l\u00e0 gi\u00e1 tr\u1ecb sai s\u1ed1 c\u1ee7a \u0111i\u1ec7n tr\u1edf<\/span><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\"><strong>L\u01b0u \u00fd:<\/strong><span style=\"font-weight: 400;\"> \u0110\u1ec3 tr\u00e1nh l\u1eabn l\u1ed9n trong khi \u0111\u1ecdc gi\u00e1 tr\u1ecb c\u1ee7a c\u00e1c \u0111i\u1ec7n tr\u1edf, \u0111\u1ed1i v\u1edbi c\u00e1c \u0111i\u1ec7n tr\u1edf c\u00f3 t\u1ed5ng s\u1ed1 v\u00f2ng m\u00e0u t\u1eeb 5 tr\u1edf xu\u1ed1ng th\u00ec c\u00f3 th\u1ec3 kh\u00f4ng b\u1ecb nh\u1ea7m l\u1eabn v\u00ec v\u1ecb tr\u00ed b\u1ecb tr\u1ed1ng kh\u00f4ng c\u00f3 v\u00f2ng m\u00e0u s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u1ec1 ph\u00eda tay ph\u1ea3i tr\u01b0\u1edbc khi \u0111\u1ecdc gi\u00e1 tr\u1ecb. C\u00f2n \u0111\u1ed1i v\u1edbi c\u00e1c \u0111i\u1ec7n tr\u1edf c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao v\u00e0 c\u00f3 th\u00eam tham s\u1ed1 thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9 th\u00ec v\u00f2ng m\u00e0u tham s\u1ed1 nhi\u1ec7t s\u1ebd \u0111\u01b0\u1ee3c nh\u00ecn th\u1ea5y c\u00f3 chi\u1ec1u r\u1ed9ng l\u1edbn h\u01a1n v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c x\u1ebfp v\u1ec1 b\u00ean tay ph\u1ea3i tr\u01b0\u1edbc khi \u0111\u1ecdc gi\u00e1 tr\u1ecb.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Tu\u00e2n theo c\u00e1ch \u0111\u1ecdc gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf nh\u01b0 tr\u00ean ch\u00fang ta s\u1ebd l\u00e0m v\u00ed d\u1ee5 tr\u00ean h\u00ecnh v\u1ebd. \u0110\u1ea7u ti\u00ean, ta \u0111\u1ecdc \u0111i\u1ec7n tr\u1edf 4 v\u1ea1ch m\u00e0u \u1edf ph\u00eda tr\u00ean, n\u00f3 c\u00f3 gi\u00e1 tr\u1ecb m\u00e0u l\u1ea7n l\u01b0\u1ee3t l\u00e0: \u0111\u1ecf\/t\u00edm\/cam\/nh\u0169 v\u00e0ng v\u00e0 ch\u00fang cho ta c\u00e1c gi\u00e1 tr\u1ecb t\u01b0\u01a1ng \u1ee9ng v\u1edbi th\u1ee9 t\u1ef1 m\u00e0u \u0111\u00f3 l\u1ea7n l\u01b0\u1ee3t l\u00e0 2\/7\/3\/5%. Sau \u0111\u00f3 nh\u00e2n l\u1ea7n l\u01b0\u1ee3t c\u00e1c gi\u00e1 tr\u1ecb t\u01b0\u01a1ng \u1ee9ng ta \u0111\u01b0\u1ee3c 27\u00d710^3\u03a9=27k\u03a9 v\u00e0 sai s\u1ed1 \u0111i\u1ec7n tr\u1edf l\u00e0 5%.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">D\u1ef1a c\u00e1ch l\u00e0m tr\u00ean b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m t\u01b0\u01a1ng t\u1ef1 v\u1edbi \u0111i\u1ec7n tr\u1edf 5 v\u1ea1ch m\u00e0u, n\u00f3 c\u00f3 c\u00e1c m\u00e0u l\u1ea7n l\u01b0\u1ee3t l\u00e0: \u0110\u1ecf\/t\u00edm\/v\u00e0ng\/\u0111\u1ecf\/n\u00e2u v\u00e0 t\u01b0\u01a1ng \u1ee9ng v\u1edbi l\u1ea7n l\u01b0\u1ee3t c\u00e1c gi\u00e1 tr\u1ecb nh\u01b0 sau: 2\/7\/4\/2\/1%. T\u1eeb \u0111\u00f3 ta t\u00ednh \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf ch\u00ednh l\u00e0 274\u00d710^2=27.4\u03a9, c\u00f3 sai s\u1ed1 \u0111i\u1ec7n tr\u1edf l\u00e0 1%.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">SMD \u0111i\u1ec7n tr\u1edf hay \u0111i\u1ec7n tr\u1edf d\u00e1n<\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Surface Mount \u0110i\u1ec7n tr\u1edf ho\u1eb7c SMD \u0111i\u1ec7n tr\u1edf l\u00e0 \u0111i\u1ec7n tr\u1edf c\u00f3 h\u00ecnh ch\u1eef nh\u1eadt l\u00e0m t\u1eeb oxit kim lo\u1ea1i r\u1ea5t nh\u1ecf. Ch\u00fang \u0111\u01b0\u1ee3c h\u00e0n tr\u1ef1c ti\u1ebfp l\u00ean b\u1ec1 m\u1eb7t m\u1ea1ch \u0111i\u1ec7n. Gi\u00e1 tr\u1ecb SMD \u0111i\u1ec7n tr\u1edf \u0111\u01b0\u1ee3c in v\u1edbi 3 ho\u1eb7c 4 ch\u1eef s\u1ed1 th\u00ec ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng cho ta bi\u1ebft h\u1ec7 s\u1ed1 nh\u00e2n.. C\u00e1ch \u0111\u1ecdc th\u1ec3 hi\u1ec7n \u1edf v\u00ed d\u1ee5 sau:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u201c103\u201d = 10 \u00d7 1.000 ohms = 10 kilo\u03a9\u2019s<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u201c392\u201d = 39 \u00d7 100 ohms = 3.9 kilo\u03a9\u2019s<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u201c563\u201d = 56 \u00d7 1.000 ohms = 56 kilo\u03a9\u2019s<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u201c105\u201d = 10 \u00d7 100,000 ohms = 1 Mega\u03a9<\/span><\/p>\n<p dir=\"ltr\" style=\"text-align: center;\"><iframe loading=\"lazy\" title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/lGdYasVCBWU\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><br \/>\n<em>T\u00ecm hi\u1ec3u \u0111i\u1ec7n tr\u1edf: Kh\u00e1i ni\u1ec7m, k\u00fd hi\u1ec7u, c\u00e1ch \u0111\u1ecdc v\u00e0 \u1ee9ng d\u1ee5ng<\/em><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Tr\u00ean \u0111\u00e2y l\u00e0 c\u00e1ch \u0111\u1ecdc b\u1ea3ng m\u00e0u \u0111i\u1ec7n tr\u1edf theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf. Hy v\u1ecdng nh\u1eefng chia s\u1ebb tr\u00ean s\u1ebd gi\u00fap \u00edch cho b\u1ea1n trong c\u00f4ng vi\u1ec7c c\u1ee7a m\u00ecnh. Ch\u00fac c\u00e1c b\u1ea1n th\u00e0nh c\u00f4ng!<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><i>M\u1ecdi chi ti\u1ebft xin vui l\u00f2ng li\u00ean h\u1ec7:<\/i><\/p>\n<p><strong>C\u00d4NG TY C\u1ed4 PH\u1ea6N H\u1eccC VI\u1ec6N IT<\/strong><br \/>\n<strong>MST: 0108733789<\/strong><br \/>\n<strong>T\u1ed5ng \u0111\u00e0i h\u1ed7 tr\u1ee3: 024 3566 8686 \u2013 Hotline: 0981 223 001<\/strong><br \/>\n<strong>Facebook:<\/strong>\u00a0<a href=\"http:\/\/www.fb.com\/hocvienit\" target=\"_blank\" rel=\"noopener\">www.fb.com\/hocvienit<\/a><\/p>\n<p><strong>\u0110\u0103ng k\u00fd k\u00eanh Youtube \u0111\u1ec3 theo d\u00f5i c\u00e1c b\u00e0i h\u1ecdc c\u1ee7a Hu\u1ea5n luy\u1ec7n vi\u00ean t\u1ed1t nh\u1ea5t:<\/strong>\u00a0<a href=\"http:\/\/bit.ly\/Youtube_HOCVIENiT\" target=\"_blank\" rel=\"noopener\">http:\/\/bit.ly\/Youtube_HOCVIENiT<\/a><\/p>\n<p><strong>Tham gia c\u1ed9ng \u0111\u1ed3ng H\u1ecdc vi\u1ec7n IT.vn t\u1ea1i:<\/strong>\u00a0<a href=\"https:\/\/www.facebook.com\/groups\/www.hocvienit.vn\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.facebook.com\/groups\/www.hocvienit.vn\/<\/a><\/p>\n<p><strong>Tr\u1ee5 s\u1edf H\u00e0 N\u1ed9i:<\/strong>\u00a0S\u1ed1 8 ng\u00f5 117 Th\u00e1i H\u00e0, \u0110\u1ed1ng \u0110a, H\u00e0 N\u1ed9i<\/p>\n<p><strong>H\u1ed3 Ch\u00ed Minh:<\/strong>\u00a0S\u1ed1 283\/45 C\u00e1ch M\u1ea1ng Th\u00e1ng T\u00e1m, Ph\u01b0\u1eddng 12, Qu\u1eadn 10,\u00a0TP.HCM<br \/>\n<strong>H\u1ea3i Ph\u00f2ng:<\/strong>\u00a0S\u1ed1 94 Qu\u00e1n Nam, L\u00ea Ch\u00e2n, H\u1ea3i Ph\u00f2ng<\/p>\n<p><strong>Th\u00e1i Nguy\u00ean:<\/strong>\u00a0S\u1ed1 297 L\u01b0\u01a1ng Ng\u1ecdc Quy\u1ebfn, TP. Th\u00e1i Nguy\u00ean<br \/>\n<strong><i>H\u1ecdc vi\u1ec7n IT.vn \u2013 Truy\u1ec1n ngh\u1ec1 th\u1ef1c t\u1ebf c\u00f9ng b\u1ea1n \u0111\u1ebfn th\u00e0nh c\u00f4ng!\u00a0<\/i><\/strong><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn c\u00e1ch \u0111\u1ecdc b\u1ea3ng m\u00e0u \u0111i\u1ec7n tr\u1edf \u0111\u00fang nh\u1ea5t b\u1edfi chuy\u00ean gia t\u1edbi t\u1eeb H\u1ecdc vi\u1ec7n iT.vn. \u0110i\u1ec7n tr\u1edf l\u00e0 m\u1ed9t linh ki\u1ec7n quan tr\u1ecdng trong thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed. \u0110\u1ecdc v\u00e0 t\u00ednh \u0111\u00fang gi\u00e1 tr\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf l\u00e0 m\u1ed9t y\u00eau c\u1ea7u c\u01a1 b\u1ea3n \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi l\u00e0m ngh\u1ec1 k\u1ef9 thu\u1eadt. C\u00f9ng ch\u00fang t\u00f4i t\u00ecm hi\u1ec3u qua b\u00e0i vi\u1ebft&#8230;<\/p>\n","protected":false},"author":95,"featured_media":12591,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96,94],"tags":[245],"_links":{"self":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/6469"}],"collection":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/users\/95"}],"replies":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6469"}],"version-history":[{"count":0,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/6469\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/media\/12591"}],"wp:attachment":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}