{"id":27281,"date":"2025-07-12T06:15:20","date_gmt":"2025-07-11T23:15:20","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=27281"},"modified":"2025-07-14T10:05:49","modified_gmt":"2025-07-14T03:05:49","slug":"may-bien-the-cau-tao-nguyen-tac-hoat-dong-cong-dung-vai-tro-kien-thuc-ly-9","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/may-bien-the-cau-tao-nguyen-tac-hoat-dong-cong-dung-vai-tro-kien-thuc-ly-9\/","title":{"rendered":"M\u00e1y bi\u1ebfn th\u1ebf: C\u1ea5u t\u1ea1o, nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng, c\u00f4ng d\u1ee5ng &amp; vai tr\u00f2 (ki\u1ebfn th\u1ee9c l\u00fd 9)"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/may-bien-the-cau-tao-nguyen-tac-hoat-dong-cong-dung-vai-tro-kien-thuc-ly-9\/#May_bien_the_la_gi\" >M\u00e1y bi\u1ebfn th\u1ebf l\u00e0 g\u00ec?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/may-bien-the-cau-tao-nguyen-tac-hoat-dong-cong-dung-vai-tro-kien-thuc-ly-9\/#Cau_tao_cua_may_bien_the\" >C\u1ea5u t\u1ea1o c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/may-bien-the-cau-tao-nguyen-tac-hoat-dong-cong-dung-vai-tro-kien-thuc-ly-9\/#Nguyen_tac_hoat_dong_cua_may_bien_the\" >Nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y bi\u1ebfn th\u1ec3\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/may-bien-the-cau-tao-nguyen-tac-hoat-dong-cong-dung-vai-tro-kien-thuc-ly-9\/#Cac_loai_may_bien_the\" >C\u00e1c lo\u1ea1i m\u00e1y bi\u1ebfn th\u1ebf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/may-bien-the-cau-tao-nguyen-tac-hoat-dong-cong-dung-vai-tro-kien-thuc-ly-9\/#May_bien_the_co_tac_dung_gi\" >M\u00e1y bi\u1ebfn th\u1ebf c\u00f3 t\u00e1c d\u1ee5ng g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/may-bien-the-cau-tao-nguyen-tac-hoat-dong-cong-dung-vai-tro-kien-thuc-ly-9\/#Vai_tro_cua_may_bien_the\" >Vai tr\u00f2 c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/may-bien-the-cau-tao-nguyen-tac-hoat-dong-cong-dung-vai-tro-kien-thuc-ly-9\/#Huong_dan_giai_bai_tap_may_bien_the_Ly_9\" >H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp m\u00e1y bi\u1ebfn th\u1ebf L\u00fd 9\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/may-bien-the-cau-tao-nguyen-tac-hoat-dong-cong-dung-vai-tro-kien-thuc-ly-9\/#Bai_tap_ve_may_bien_the_Vat_Ly_9_tu_luyen\" >B\u00e0i t\u1eadp v\u1ec1 m\u00e1y bi\u1ebfn th\u1ebf V\u1eadt L\u00fd 9 t\u1ef1 luy\u1ec7n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/may-bien-the-cau-tao-nguyen-tac-hoat-dong-cong-dung-vai-tro-kien-thuc-ly-9\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>M\u00e1y bi\u1ebfn th\u1ebf \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong th\u1ef1c t\u1ebf, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong ng\u00e0nh \u0111i\u1ec7n. Do \u0111\u00f3, vi\u1ec7c h\u1ecdc t\u1eadp c\u00e1c ki\u1ebfn th\u1ee9c li\u00ean quan \u0111\u1ebfn m\u00e1y bi\u1ebfn th\u1ebf kh\u00f4ng ch\u1ec9 gi\u00fap c\u00e1c em ho\u00e0n th\u00e0nh th\u1eadt t\u1ed1t ch\u01b0\u01a1ng tr\u00ecnh V\u1eadt L\u00fd 9, m\u00e0 c\u00f2n h\u1ed7 tr\u1ee3 c\u00e1c em trong vi\u1ec7c t\u01b0 duy, gi\u1ea3i th\u00edch c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng trong \u0111\u1eddi s\u1ed1ng h\u1eb1ng ng\u00e0y. <\/p>\n<p>                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/image\/600x480.png\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"May_bien_the_la_gi\"><\/span>M\u00e1y bi\u1ebfn th\u1ebf l\u00e0 g\u00ec?\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/may-bien-the-6_(1).jpg\" alt=\"M\u00e1y bi\u1ebfn th\u1ebf l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eeb t\u0129nh. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\"><em>M\u00e1y bi\u1ebfn th\u1ebf (hay c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u00e1y bi\u1ebfn \u00e1p), l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eeb lo\u1ea1i t\u0129nh, ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng \u0111i\u1ec7n v\u00e0 d\u1ef1a tr\u00ean nguy\u00ean l\u00fd c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb.\u00a0<\/em><\/p>\n<p dir=\"ltr\">M\u1ee5c \u0111\u00edch c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf l\u00e0 chuy\u1ec3n \u0111\u1ed5i m\u1ed9t h\u1ec7 th\u1ed1ng d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u \u1edf \u0111i\u1ec7n \u00e1p n\u00e0y th\u00e0nh d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u \u1edf \u0111i\u1ec7n \u00e1p kh\u00e1c.\u00a0Tuy nhi\u00ean, vi\u1ec7c bi\u1ebfn \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n s\u1ebd kh\u00f4ng l\u00e0m thay \u0111\u1ed5i t\u1ea7n s\u1ed1 c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n.\u00a0<\/p>\n<p dir=\"ltr\">M\u00e1y bi\u1ebfn \u00e1p \u00e1p d\u1ee5ng hi\u1ec7n t\u01b0\u1ee3ng c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb \u0111\u1ec3 nh\u1eadn v\u00e0 truy\u1ec1n nh\u1eefng t\u00edn hi\u1ec7u \u0111i\u1ec7n ho\u1eb7c n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n xoay chi\u1ec1u theo m\u1ed9t nguy\u00ean l\u00fd nh\u1ea5t \u0111\u1ecbnh gi\u1eefa c\u00e1c m\u1ea1ch \u0111i\u1ec7n.\u00a0Tr\u00ean th\u1ef1c t\u1ebf, ch\u00fang c\u00f3 nhi\u1ec7m v\u1ee5 truy\u1ec1n t\u1ea3i \u0111i\u1ec7n n\u0103ng v\u00e0 ph\u00e2n ph\u1ed1i n\u0103ng l\u01b0\u1ee3ng \u0111\u1ebfn n\u01a1i s\u1eed d\u1ee5ng t\u01b0\u01a1ng \u1ee9ng.\u00a0<\/p>\n<p dir=\"ltr\">L\u01b0u \u00fd, m\u00e1y bi\u1ebfn \u00e1p kh\u00f4ng c\u00f3 ch\u1ee9c n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng.\u00a0<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cau_tao_cua_may_bien_the\"><\/span>C\u1ea5u t\u1ea1o c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u1ea5u t\u1ea1o m\u00e1y bi\u1ebfn \u00e1p v\u1edbi 3 th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a m\u00e1y \u0111\u00f3 l\u00e0 l\u00f5i th\u00e9p, cu\u1ed9n d\u00e2y (d\u00e2y qu\u1ea5n) v\u00e0 v\u1ecf m\u00e1y.\u00a0<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/may-bien-the-3.jpg\" alt=\"C\u1ea5u t\u1ea1o c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">L\u00f5i th\u00e9p<\/p>\n<ul>\n<li dir=\"ltr\">L\u00f5i th\u00e9p \u0111\u01b0\u1ee3c \u0111\u1eb7t b\u00ean trong m\u00e1y bi\u1ebfn th\u1ebf, th\u00f4ng th\u01b0\u1eddng l\u00f5i c\u00f3 g\u00f4ng v\u00e0 tr\u1ee5. Tr\u1ee5 c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf d\u00f9ng \u0111\u1ec3 \u0111\u1eb7t d\u00e2y qu\u1ea5n v\u00e0o, c\u00f2n ph\u1ea7n g\u00f4ng c\u00f3 t\u00e1c d\u1ee5ng n\u1ed1i li\u1ec1n gi\u1eefa c\u00e1c tr\u1ee5 v\u1edbi nhau.<\/li>\n<li dir=\"ltr\">L\u00f5i th\u00e9p c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o t\u1eeb nh\u1eefng l\u00e1 s\u1eaft m\u1ecfng, gh\u00e9p v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng c\u00e1ch \u0111i\u1ec7n v\u1edbi nhau. Nh\u1edd \u0111\u00f3 m\u00e0 ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 \u1ee9ng d\u1ee5ng \u0111\u1ec3 ch\u1ebf t\u1ea1o ra \u0111\u01b0\u1ee3c v\u1eadt li\u1ec7u d\u1eabn t\u1eeb c\u1ef1c k\u1ef3 hi\u1ec7u qu\u1ea3.\u00a0<\/li>\n<li dir=\"ltr\">L\u00f5i th\u00e9p th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5 d\u1eabn t\u1eeb th\u00f4ng. B\u00ean c\u1ea1nh \u0111\u00f3, ch\u00fang c\u00f2n \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng \u0111\u1ec3 ch\u1ebf t\u1ea1o khung \u0111\u1eb7t v\u00e0o cu\u1ed9n d\u00e2y d\u1eabn. Khung c\u1ee7a nh\u1eefng lo\u1ea1i m\u00e1y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u trong l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7 th\u00f4ng tin \u0111\u00f2i h\u1ecfi ph\u1ea3i \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1ea7n s\u1ed1 cao. V\u00ec v\u1eady, ng\u01b0\u1eddi ta s\u1ebd s\u1eed d\u1ee5ng c\u00e1c l\u00e1 th\u00e9p Permalloy \u0111\u1ec3 gh\u00e9p l\u1ea1i v\u1edbi nhau.<\/li>\n<\/ul>\n<p dir=\"ltr\">Cu\u1ed9n d\u00e2y ho\u1eb7c d\u00e2y qu\u1ea5n<\/p>\n<ul>\n<li dir=\"ltr\">D\u00e2y qu\u1ea5n c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng \u0111\u1ed3ng ho\u1eb7c b\u1eb1ng nh\u00f4m \u0111\u1ec3 c\u00f3 th\u1ec3 d\u1eabn \u0111i\u1ec7n t\u1ed1t. H\u01a1n n\u1eefa, m\u00e1y bi\u1ebfn th\u1ebf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng li\u00ean t\u1ee5c v\u00e0 \u1ee9ng d\u1ee5ng nhi\u1ec1u trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i \u0111i\u1ec7n n\u0103ng. Do \u0111\u00f3 ch\u1ea5t li\u1ec7u \u0111\u1ed3ng ngo\u00e0i vi\u1ec7c d\u1eabn \u0111i\u1ec7n t\u1ed1t c\u00f2n gi\u00fap m\u00e1y h\u1ea1n ch\u1ebf \u0111\u01b0\u1ee3c s\u1ef1 oxy h\u00f3a, t\u1eeb \u0111\u00f3 gi\u00fap t\u0103ng \u0111\u1ed9 b\u1ec1n cho m\u00e1y. Ngo\u00e0i ra, d\u00e2y \u0111\u01b0\u1ee3c b\u1ecdc c\u00e1ch \u0111i\u1ec7n \u1edf b\u00ean ngo\u00e0i m\u1ee5c \u0111\u00edch \u0111\u1ec3 d\u1ec5 d\u00e0ng nh\u1eadn n\u0103ng l\u01b0\u1ee3ng v\u00e0 ph\u00e2n ph\u1ed1i n\u0103ng l\u01b0\u1ee3ng ra ngo\u00e0i.\u00a0<\/li>\n<\/ul>\n<p>Cu\u1ed9n s\u01a1 c\u1ea5p v\u00e0 cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 g\u00ec?<\/p>\n<ul>\n<li dir=\"ltr\">Cu\u1ed9n s\u01a1 c\u1ea5p l\u00e0 cu\u1ed9n d\u00e2y th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5 d\u1eabn n\u0103ng l\u01b0\u1ee3ng \u0111\u1ec3 truy\u1ec1n v\u00e0o gi\u1eefa c\u00e1c m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u.<\/li>\n<li dir=\"ltr\">Cu\u1ed9n d\u00e2y th\u1ee9 c\u1ea5p c\u00f3 nhi\u1ec7m v\u1ee5 ng\u01b0\u1ee3c l\u1ea1i &#8211; nh\u1eadn v\u00e0 truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng ra \u0111\u1ec3 n\u1ed1i v\u1edbi t\u1ea3i ti\u00eau th\u1ee5 \u0111i\u1ec7n. M\u1ed9t \u0111i\u1ec3m c\u1ea7n l\u01b0u \u00fd khi ch\u1ebf t\u1ea1o \u0111\u00f3 l\u00e0 hai cu\u1ed9n d\u00e2y n\u00e0y ph\u1ea3i c\u00f3 s\u1ed1 v\u00f2ng d\u00e2y kh\u00e1c nhau. T\u00f9y thu\u1ed9c v\u00e0o m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng m\u00e0 ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t \u0111i\u1ec1u ch\u1ec9nh s\u1ed1 v\u00f2ng d\u00e2y N1&lt;N2 ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i.<\/li>\n<\/ul>\n<p dir=\"ltr\">Tr\u01b0\u1eddng h\u1ee3p s\u1ed1 v\u00f2ng d\u00e2y cu\u1ed9n s\u01a1 c\u1ea5p l\u1edbn h\u01a1n s\u1ed1 v\u00f2ng d\u00e2y cu\u1ed9n th\u1ee9 c\u1ea5p th\u00ec l\u00e0 m\u00e1y c\u00f3 t\u00e1c d\u1ee5ng h\u1ea1 \u00e1p (m\u00e1y bi\u1ebfn \u00e1p h\u1ea1 th\u1ebf).<\/p>\n<p dir=\"ltr\">C\u00f2n n\u1ebfu s\u1ed1 v\u00f2ng d\u00e2y cu\u1ed9n s\u01a1 c\u1ea5p nh\u1ecf h\u01a1n s\u1ed1 v\u00f2ng d\u00e2y cu\u1ed9n th\u1ee9 c\u1ea5p th\u00ec l\u00e0 m\u00e1y c\u00f3 t\u00e1c d\u1ee5ng t\u0103ng \u00e1p (m\u00e1y bi\u1ebfn \u00e1p t\u0103ng th\u1ebf).<\/p>\n<p dir=\"ltr\">V\u1ecf m\u00e1y<\/p>\n<ul>\n<li dir=\"ltr\">V\u1ecf m\u00e1y c\u00f3 2 ph\u1ea7n ch\u00ednh l\u00e0 th\u00f9ng v\u00e0 n\u1eafp th\u00f9ng.<\/li>\n<li dir=\"ltr\">V\u1ecf m\u00e1y \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o t\u1eeb r\u1ea5t nhi\u1ec1u ch\u1ea5t li\u1ec7u, t\u00f9y thu\u1ed9c v\u00e0o m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng. Ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb <em>gang, t\u00f4n m\u1ecfng, th\u00e9p ho\u1eb7c nh\u1ef1a, g\u1ed7.<\/em><\/li>\n<li dir=\"ltr\">Nhi\u1ec7m v\u1ee5 ch\u00ednh c\u1ee7a v\u1ecf m\u00e1y l\u00e0 b\u1ea3o v\u1ec7 c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean trong c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf.<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Nguyen_tac_hoat_dong_cua_may_bien_the\"><\/span>Nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y bi\u1ebfn th\u1ec3\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><em>Nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf d\u1ef1a v\u00e0o <\/em><em>nguy\u00ean l\u00fd c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb.<\/em><\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/may-bien-the-1.jpg\" alt=\"Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">\u0110\u00e2y l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng x\u1ea3y ra khi c\u00f3 m\u1ed9t \u0111i\u1ec7n \u00e1p ho\u1eb7c g\u1ecdi l\u00e0 m\u1ed9t su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng ch\u1ea1y qua m\u1ed9t v\u1eadt d\u1eabn. Khi \u0111\u00f3, v\u1eadt s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf b\u00ean trong m\u1ed9t t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean.<\/p>\n<ul>\n<li dir=\"ltr\">Ta g\u1ecdi N1 l\u00e0 s\u1ed1 v\u00f2ng d\u00e2y c\u1ee7a cu\u1ed9n d\u00e2y 1<\/li>\n<li dir=\"ltr\">N2 l\u00e0 s\u1ed1 v\u00f2ng d\u00e2y c\u1ee7a cu\u1ed9n d\u00e2y 2.<\/li>\n<li dir=\"ltr\">D\u00e2y qu\u1ea5n 1 \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi ngu\u1ed3n c\u1ee7a m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u U1. \u0110\u00e2y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 d\u00e2y qu\u1ea5n s\u01a1 c\u1ea5p.<\/li>\n<li dir=\"ltr\">C\u00f2n d\u00e2y 2 s\u1ebd l\u00e0m nhi\u1ec7m v\u1ee5 cung c\u1ea5p \u0111i\u1ec7n cho ph\u1ee5 t\u1ea3i Zt \u0111i\u1ec7n \u00e1p. Ch\u00fang \u0111\u01b0\u1ee3c g\u1ecdi d\u00e2y qu\u1ea5n th\u1ee9 c\u1ea5p U2<\/li>\n<\/ul>\n<p dir=\"ltr\">2 cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c qu\u1ea5n tr\u00ean m\u1ed7i l\u00f5i th\u00e9p kh\u00e9p k\u00edn. Ti\u1ebfn h\u00e0nh cho m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u U1 v\u00e0o cu\u1ed9n d\u00e2y N1, xu\u1ea5t hi\u1ec7n m\u1ed9t d\u00f2ng \u0111i\u1ec7n I1 ch\u1ea1y trong d\u00e2y d\u1eabn c\u1ee7a cu\u1ed9n d\u00e2y N1. \u0110\u1ed3ng th\u1eddi trong cu\u1ed9n d\u00e2y N1 c\u0169ng s\u1ebd xu\u1ea5t hi\u1ec7n t\u1eeb th\u00f4ng m\u00f3c v\u00f2ng cho c\u1ea3 hai cu\u1ed9n d\u00e2y N1 v\u00e0 N2.\u00a0<\/p>\n<p dir=\"ltr\">T\u01b0\u01a1ng t\u1ef1, cu\u1ed9n d\u00e2y N2 \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi t\u1ea3i th\u00ec tr\u00ean cu\u1ed9n N2 s\u1ebd xu\u1ea5t hi\u1ec7n \u0111i\u1ec7n \u00e1p U2 v\u1edbi d\u00f2ng \u0111i\u1ec7n I2. Nh\u01b0 v\u1eady, n\u0103ng l\u01b0\u1ee3ng c\u1ee7a d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u \u0111\u00e3 \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb cu\u1ed9n d\u00e2y 1 sang cu\u1ed9n d\u00e2y 2.<\/p>\n<p dir=\"ltr\">Ch\u00fa \u00fd: V\u1edbi ch\u01b0\u01a1ng tr\u00ecnh V\u1eadt L\u00fd l\u1edbp 9, ta t\u1ea1m th\u1eddi b\u1ecf qua t\u1ed5n hao c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf. Khi \u0111\u00f3, c\u00f4ng th\u1ee9c chung \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng l\u00e0 U1xI1=U2xI2. Suy ra, t\u1ef7 l\u1ec7 chung \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong t\u00ednh to\u00e1n l\u00e0:<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/may-bien-the-cong-thuc.JPG\" alt=\"\" width=\"670\" height=\"110\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_loai_may_bien_the\"><\/span>C\u00e1c lo\u1ea1i m\u00e1y bi\u1ebfn th\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/may-bien-the-4.jpg\" alt=\"M\u00e1y bi\u1ebfn th\u1ebf \u0111\u01b0\u1ee3c chia th\u00e0nh nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">M\u00e1y bi\u1ebfn th\u1ebf \u0111\u01b0\u1ee3c chia th\u00e0nh nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau. M\u1ed9t s\u1ed1 c\u00e1ch \u0111\u1ec3 ph\u00e2n lo\u1ea1i m\u00e1y gi\u00fap ng\u01b0\u1eddi d\u00f9ng d\u1ec5 d\u00e0ng x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c lo\u1ea1i m\u00e1y ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c \u0111\u00edch v\u00e0 nhu c\u1ea7u s\u1eed d\u1ee5ng:<\/p>\n<table style=\"border-collapse: collapse;width: 100%;height: 390.297px;border-color: #4e4c50;border-style: solid\" border=\"1\">\n<tr style=\"height: 22.3906px\">\n<td style=\"width: 32.1143%;height: 22.3906px;text-align: center;border: 0.5px solid #4e4c50;background-color: #ee202e\">C\u00e1ch ph\u00e2n lo\u1ea1i m\u00e1y bi\u1ebfn th\u1ebf<\/td>\n<td style=\"width: 67.986%;height: 22.3906px;text-align: center;border: 0.5px solid #4e4c50;background-color: #ee202e\">C\u00e1c lo\u1ea1i<\/td>\n<\/tr>\n<tr style=\"height: 92.7812px;background-color: #fbeeb8\">\n<td style=\"width: 32.1143%;height: 92.7812px;border: 0.5px solid #4e4c50;background-color: #fff4f5;text-align: left\">Theo c\u1ea5u t\u1ea1o\u00a0<\/td>\n<td style=\"width: 67.986%;height: 92.7812px;border: 0.5px solid #4e4c50;background-color: #fff4f5\">\n<p>&#8211; M\u00e1y bi\u1ebfn \u00e1p m\u1ed9t pha<\/p>\n<p>&#8211; M\u00e1y bi\u1ebfn \u00e1p ba pha<\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 67.1719px;background-color: #fbeeb8\">\n<td style=\"width: 32.1143%;height: 67.1719px;border: 0.5px solid #4e4c50;background-color: #fff4f5;text-align: left\">Theo nhi\u1ec7m v\u1ee5 c\u1ee7a m\u00e1y<\/td>\n<td style=\"width: 67.986%;height: 67.1719px;border: 0.5px solid #4e4c50;background-color: #fff4f5\">&#8211; C\u00e1c lo\u1ea1i m\u00e1y bi\u1ebfn \u00e1p kh\u00e1c nhau s\u1ebd c\u00f3 c\u00f4ng d\u1ee5ng kh\u00e1c nhau nh\u01b0 m\u00e1y bi\u1ebfn \u00e1p h\u00e0, m\u00e1y bi\u1ebfn \u00e1p d\u00e2n d\u1ee5ng, m\u00e1y bi\u1ebfn \u00e1p xung, m\u00e1y bi\u1ebfn \u00e1p h\u00e0n.\u00a0<\/td>\n<\/tr>\n<tr style=\"height: 92.7812px;background-color: #fbeeb8\">\n<td style=\"width: 32.1143%;height: 92.7812px;border: 0.5px solid #4e4c50;background-color: #fff4f5;text-align: left\">Theo c\u00e1ch th\u1ee9c \u0111i\u1ec7n\u00a0<\/td>\n<td style=\"width: 67.986%;height: 92.7812px;border: 0.5px solid #4e4c50;background-color: #fff4f5\">\n<p>&#8211; M\u00e1y bi\u1ebfn th\u1ebf l\u00f5i d\u1ea7u<\/p>\n<p>&#8211; M\u00e1y bi\u1ebfn th\u1ebf l\u00f5i kh\u00f4ng kh\u00ed<\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 92.7812px;background-color: #fbeeb8\">\n<td style=\"width: 32.1143%;height: 92.7812px;border: 0.5px solid #4e4c50;background-color: #fff4f5;text-align: left\">Theo ch\u1ee9c n\u0103ng<\/td>\n<td style=\"width: 67.986%;height: 92.7812px;border: 0.5px solid #4e4c50;background-color: #fff4f5\">\n<p>&#8211; M\u00e1y bi\u1ebfn \u00e1p t\u0103ng th\u1ebf<\/p>\n<p>&#8211; M\u00e1y bi\u1ebfn \u00e1p h\u1ea1 th\u1ebf<\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 22.3906px;background-color: #fbeeb8\">\n<td style=\"width: 32.1143%;height: 22.3906px;border: 0.5px solid #4e4c50;background-color: #fff4f5;text-align: left\">Theo m\u1ed1i quan h\u1ec7 cu\u1ed9n d\u00e2y\u00a0<\/td>\n<td style=\"width: 67.986%;height: 22.3906px;border: 0.5px solid #4e4c50;background-color: #fff4f5\">&#8211; M\u00e1y bi\u1ebfn \u00e1p t\u1ef1 ng\u1eabu v\u00e0 m\u00e1y bi\u1ebfn \u00e1p c\u00e1ch ly,&#8230;<\/td>\n<\/tr>\n<\/table>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"May_bien_the_co_tac_dung_gi\"><\/span>M\u00e1y bi\u1ebfn th\u1ebf c\u00f3 t\u00e1c d\u1ee5ng g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">M\u00e1y bi\u1ebfn th\u1ebf c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m bi\u1ebfn \u0111\u1ed5i hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u0111\u1eb7t v\u00e0o 2 \u0111\u1ea7u cu\u1ed9n d\u00e2y. C\u1ee5 th\u1ec3:\u00a0<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">G\u1ecdi hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u0111\u1eb7t v\u00e0o 2 \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p l\u00e0 U1, s\u1ed1 v\u00f2ng d\u00e2y c\u1ee7a cu\u1ed9n s\u01a1 c\u1ea5p l\u00e0 N1<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">G\u1ecdi hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u0111\u1eb7t v\u00e0o 2 \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 U2, s\u1ed1 v\u00f2ng d\u00e2y c\u1ee7a cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 N2<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">B\u1eb1ng nhi\u1ec1u th\u00ed nghi\u1ec7m ch\u1ee9ng minh, ng\u01b0\u1eddi ta th\u1ea5y r\u1eb1ng hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y m\u00e1y bi\u1ebfn thi\u00ean t\u1ec9 l\u1ec7 v\u1edbi s\u1ed1 v\u00f2ng d\u00e2y c\u1ee7a m\u1ed7i cu\u1ed9n d\u00e2y. Khi \u0111\u00f3, t\u1ef7 s\u1ed1 hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p b\u1eb1ng t\u1ec9 s\u1ed1 gi\u1eefa s\u1ed1 v\u00f2ng c\u1ee7a c\u00e1c cu\u1ed9n d\u00e2y t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<p dir=\"ltr\">Ta c\u00f3 t\u1ef7 l\u1ec7: U1\/U2= N2\/N1<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Khi U1 &gt; U2, t\u1ee9c hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa 2 \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p l\u1edbn h\u01a1n hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa 2 \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p, th\u00ec \u0111\u00e2y l\u00e0 m\u00e1y bi\u1ebfn \u00e1p h\u1ea1 th\u1ebf.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Khi U1 &lt; U2, t\u1ee9c hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa 2 \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p nh\u1ecf h\u01a1n hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa 2 \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p, th\u00ec \u0111\u00e2y l\u00e0 m\u00e1y bi\u1ebfn \u00e1p t\u0103ng th\u1ebf.<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Vai_tro_cua_may_bien_the\"><\/span>Vai tr\u00f2 c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/may-bien-the-5.jpg\" alt=\"Vai tr\u00f2 c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf trong vi\u1ec7c truy\u1ec1n t\u1ea3i \u0111i\u1ec7n n\u0103ng. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Nh\u01b0 \u0111\u00e3 ph\u00e2n t\u00edch b\u00ean tr\u00ean, c\u00e1c em c\u00f3 th\u1ec3 r\u00fat ra \u0111\u01b0\u1ee3c vai tr\u00f2 c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf l\u00e0 \u0111\u1ec3 bi\u1ebfn \u0111\u1ed5i hi\u1ec7u \u0111i\u1ec7n th\u1ebf, hay n\u00f3i c\u00e1ch kh\u00e1c l\u00e0 chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n \u00e1p v\u1ec1 \u0111\u00fang gi\u00e1 tr\u1ecb ph\u1ee5c v\u1ee5 t\u1eebng nhu c\u1ea7u s\u1eed d\u1ee5ng. V\u00ec v\u1eady, m\u00e1y bi\u1ebfn \u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u t\u1ea1i c\u00e1c nh\u00e0 m\u00e1y, h\u1ed7 tr\u1ee3 nhi\u1ec1u ho\u1ea1t \u0111\u1ed9ng truy\u1ec1n t\u1ea3i \u0111i\u1ec7n kh\u00e1c nhau.\u00a0<\/p>\n<p dir=\"ltr\">Qua \u0111\u00f3, ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111i\u1ec1u ch\u1ec9nh t\u0103ng \u0111i\u1ec7n \u00e1p t\u1eeb m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u truy\u1ec1n \u0111\u1ebfn c\u00e1c \u0111\u01b0\u1eddng d\u00e2y truy\u1ec1n t\u1ea3i \u0111i\u1ec7n \u0111i xa. B\u00ean c\u1ea1nh \u0111\u00f3, m\u00e1y c\u0169ng c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m gi\u1ea3m \u0111i\u1ec7n \u00e1p \u1edf cu\u1ed1i \u0111\u01b0\u1eddng d\u00e2y, \u0111\u00e1p \u1ee9ng m\u1ee5c \u0111\u00edch cung c\u1ea5p cho t\u1ea3i.<\/p>\n<p dir=\"ltr\">Ngo\u00e0i vai tr\u00f2 trong vi\u1ec7c truy\u1ec1n t\u1ea3i \u0111i\u1ec7n n\u0103ng \u0111i xa, m\u00e1y bi\u1ebfn \u00e1p c\u00f2n \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nhi\u1ec1u trong c\u00e1c<em> l\u00f2 h\u00e0n \u0111i\u1ec7n, l\u00f2 nung, \u0111o l\u01b0\u1eddng ho\u1eb7c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m ngu\u1ed3n \u0111i\u1ec7n cho c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n, \u0111i\u1ec7n t\u1eed.<\/em><\/p>\n<p dir=\"ltr\">Xem th\u00eam: V\u00ec sao ph\u1ea3i truy\u1ec1n t\u1ea3i \u0111i\u1ec7n n\u0103ng \u0111i xa? Gi\u1ea3i \u0111\u00e1p ki\u1ebfn th\u1ee9c l\u00fd l\u1edbp 9<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Huong_dan_giai_bai_tap_may_bien_the_Ly_9\"><\/span>H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp m\u00e1y bi\u1ebfn th\u1ebf L\u00fd 9\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Sau khi \u0111\u00e3 t\u00ecm hi\u1ec3u l\u00fd thuy\u1ebft li\u00ean quan \u0111\u1ebfn m\u00e1y bi\u1ebfn th\u1ebf, c\u00e1c em c\u0169ng c\u1ea7n ph\u1ea3i th\u1ef1c h\u00e0nh c\u00e1c c\u00e2u h\u1ecfi b\u00e0i t\u1eadp trong ph\u1ea7n n\u00e0y \u0111\u1ec3 n\u1eafm v\u1eefng c\u0169ng nh\u01b0 ghi nh\u1edb th\u1eadt k\u1ef9 n\u1ed9i dung b\u00e0i h\u1ecdc.<\/p>\n<p dir=\"ltr\">B\u00e0i C1 (trang 100 SGK V\u1eadt L\u00fd 9): N\u1ebfu \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u c\u1ee7a m\u1ed9t cu\u1ed9n d\u00e2y (g\u1ecdi l\u00e0 cu\u1ed9n s\u01a1 c\u1ea5p) m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u th\u00ec b\u00f3ng \u0111\u00e8n m\u1eafc \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y kia (g\u1ecdi l\u00e0 cu\u1ed9n th\u1ee9 c\u1ea5p) c\u00f3 s\u00e1ng l\u00ean kh\u00f4ng? T\u1ea1i sao?<\/p>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i: N\u1ebfu \u0111\u1eb7t v\u00e0o 2 \u0111\u1ea7u cu\u1ed9n d\u00e2y s\u01a1 c\u1ea5p m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u th\u00ec b\u00f3ng \u0111\u00e8n m\u1eafc \u1edf 2 \u0111\u1ea7u cu\u1ed9n d\u00e2y th\u1ee9 c\u1ea5p c\u00f3 ph\u00e1t s\u00e1ng.\u00a0<\/p>\n<p dir=\"ltr\">Nguy\u00ean nh\u00e2n v\u00ec s\u1ebd xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u khi \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u. L\u00f5i s\u1eaft b\u1ecb nhi\u1ec5m t\u1eeb sau \u0111\u00f3 s\u1ebd tr\u1edf th\u00e0nh m\u1ed9t nam ch\u00e2m c\u00f3 t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean; s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u1ee7a t\u1eeb tr\u01b0\u1eddng xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n th\u1ee9 c\u1ea5p c\u0169ng theo \u0111\u00f3 m\u00e0 bi\u1ebfn thi\u00ean. V\u00ec v\u1eady, b\u00ean trong cu\u1ed9n d\u00e2y th\u1ee9 c\u1ea5p xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng l\u00e0m cho \u0111\u00e8n ph\u00e1t s\u00e1ng.<\/p>\n<p dir=\"ltr\">B\u00e0i C2 (trang 100 SGK V\u1eadt L\u00fd 9): Hi\u1ec7u \u0111i\u1ec7n th\u1ebf xu\u1ea5t hi\u1ec7n \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y th\u1ee9 c\u1ea5p c\u0169ng l\u00e0 hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u. V\u00ec sao?<\/p>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i: \u0110\u1eb7t v\u00e0o 2 \u0111\u1ea7u cu\u1ed9n d\u00e2y s\u01a1 c\u1ea5p m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u th\u00ec trong cu\u1ed9n d\u00e2y \u0111\u00f3 c\u00f3 xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ch\u1ea1y qua. T\u1eeb tr\u01b0\u1eddng trong l\u00f5i s\u1eaft lu\u00e2n phi\u00ean t\u0103ng gi\u1ea3m. K\u1ebft qu\u1ea3 l\u00e0 trong cu\u1ed9n d\u00e2y th\u1ee9 c\u1ea5p xu\u1ea5t hi\u1ec7n m\u1ed9t d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u.\u00a0<\/p>\n<p dir=\"ltr\">M\u1eb7t kh\u00e1c, m\u1ed9t d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ph\u1ea3i do m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u g\u00e2y ra. \u0110i\u1ec1u n\u00e0y l\u00fd gi\u1ea3i v\u00ec sao hi\u1ec7u \u0111i\u1ec7n th\u1ebf xu\u1ea5t hi\u1ec7n \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y th\u1ee9 c\u1ea5p l\u00e0 hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u.<\/p>\n<p dir=\"ltr\">B\u00e0i C3 (trang 101 SGK V\u1eadt L\u00fd 9): C\u0103n c\u1ee9 v\u00e0o s\u1ed1 li\u1ec7u trong b\u1ea3ng 1 SGK, h\u00e3y r\u00fat ra nh\u1eadn x\u00e9t v\u1ec1 m\u1ed1i quan h\u1ec7 gi\u1eefa hi\u1ec7u \u0111i\u1ec7n th\u1ebf U \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u c\u1ee7a c\u00e1c cu\u1ed9n d\u00e2y c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf v\u00e0 s\u1ed1 v\u00f2ng d\u00e2y c\u1ee7a c\u00e1c cu\u1ed9n t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/may-bien-the-2.jpg\" alt=\"\" width=\"100%\"><\/p>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i: Hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf hai \u0111\u1ea7u m\u1ed7i cu\u1ed9n d\u00e2y c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf t\u1ec9 l\u1ec7 v\u1edbi s\u1ed1 v\u00f2ng d\u00e2y c\u1ee7a c\u00e1c cu\u1ed9n d\u00e2y t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<p dir=\"ltr\">B\u00e0i C4 (trang 102 SGK V\u1eadt L\u00fd 9): M\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf d\u00f9ng trong nh\u00e0 c\u1ea7n ph\u1ea3i h\u1ea1 hi\u1ec7u \u0111i\u1ec7n th\u1ebf t\u1eeb 220V xu\u1ed1ng c\u00f2n 6V v\u00e0 3V. Cu\u1ed9n s\u01a1 c\u1ea5p c\u00f3 4000 v\u00f2ng. T\u00ednh s\u1ed1 v\u00f2ng c\u1ee7a c\u00e1c cu\u1ed9n th\u1ee9 c\u1ea5p t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<p dir=\"ltr\">T\u00f3m t\u1eaft:<\/p>\n<p dir=\"ltr\">U1 = 220V; n1 = 4000 v\u00f2ng;<\/p>\n<p dir=\"ltr\">U2 = 6V; U2\u2019 = 3V;<\/p>\n<p dir=\"ltr\">n2 = ?; n2\u2019 = ?<\/p>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i:<\/p>\n<p dir=\"ltr\">V\u1edbi U2 = 6V, ta c\u00f3: U1\/U2= N2\/N1 =&gt; N2 = N1. U1\/U2 = 4000.6\/220= 109 (v\u00f2ng)<\/p>\n<p dir=\"ltr\">V\u1edbi U2\u2019 = 3V ta t\u00ednh \u0111\u01b0\u1ee3c cu\u1ed9n 3V c\u00f3 s\u1ed1 v\u00f2ng l\u00e0:<\/p>\n<p dir=\"ltr\">N\u20192 = N1. U\u20192\/U1 = 4000.3\/220= 54,6 (v\u00f2ng)<\/p>\n<p dir=\"ltr\">C\u00e2u 2 (Trang 80 s\u00e1ch b\u00e0i t\u1eadp V\u1eadt L\u00ed 9): Cu\u1ed9n s\u01a1 c\u1ea5p c\u1ee7a m\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf c\u00f3 4400 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 240 v\u00f2ng. Khi \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u 220V th\u00ec \u1edf hai \u0111\u1ea7u d\u00e2y c\u1ee7a cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 bao nhi\u00eau?<\/p>\n<p dir=\"ltr\">T\u00f3m t\u1eaft:<\/p>\n<p dir=\"ltr\">N1 = 4400 v\u00f2ng; N2 = 240 v\u00f2ng<\/p>\n<p dir=\"ltr\">U1 = 220 V; U2 = ?<\/p>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i:\u00a0<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c: U1\/U2= N2\/N1\u00a0<\/p>\n<p dir=\"ltr\">Khi \u0111\u00f3, hai \u0111\u1ea7u d\u00e2y c\u1ee7a cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0:<\/p>\n<p dir=\"ltr\">U2 = U1.N2\/N1 = 220.240\/4400 = 12(V)<\/p>\n<p dir=\"ltr\">B\u00e0i 3 (Trang 80 s\u00e1ch b\u00e0i t\u1eadp V\u1eadt L\u00ed 9): V\u00ec sao kh\u00f4ng th\u1ec3 d\u00f9ng d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u kh\u00f4ng \u0111\u1ed5i \u0111\u1ec3 ch\u1ea1y m\u00e1y bi\u1ebfn th\u1ebf?<\/p>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i: V\u00ec d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u kh\u00f4ng \u0111\u1ed5i s\u1ebd t\u1ea1o ra m\u1ed9t t\u1eeb tr\u01b0\u1eddng kh\u00f4ng \u0111\u1ed5i, d\u1eabn \u0111\u1ebfn s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n c\u1ee7a cu\u1ed9n th\u1ee9 c\u1ea5p kh\u00f4ng \u0111\u1ed5i. Khi \u0111\u00f3 trong cu\u1ed9n th\u1ee9 c\u1ea5p kh\u00f4ng c\u00f3 d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng.<\/p>\n<p dir=\"ltr\">B\u00e0i 4 (Trang 80 s\u00e1ch b\u00e0i t\u1eadp V\u1eadt L\u00ed 9): M\u1ed9t m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u cho m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf hai c\u1ef1c c\u1ee7a m\u00e1y l\u00e0 2000V. Mu\u1ed1n t\u1ea3i \u0111i\u1ec7n n\u0103ng \u0111i xa, ng\u01b0\u1eddi ta ph\u1ea3i t\u0103ng hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00ean t\u1edbi 20000V. H\u1ecfi ph\u1ea3i d\u00f9ng m\u00e1y bi\u1ebfn th\u1ebf v\u1edbi c\u00e1c cu\u1ed9n d\u00e2y c\u00f3 s\u1ed1 v\u00f2ng d\u00e2y theo t\u1ec9 l\u1ec7 n\u00e0o? Cu\u1ed9n d\u00e2y n\u00e0o m\u1eafc v\u1edbi hai c\u1ef1c c\u1ee7a m\u00e1y ph\u00e1t \u0111i\u1ec7n?<\/p>\n<p dir=\"ltr\">T\u00f3m t\u1eaft:<\/p>\n<p dir=\"ltr\">U1 = 2000V; U2 = 20000V<\/p>\n<p dir=\"ltr\">N2\/N1 = ?<\/p>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i:<\/p>\n<p dir=\"ltr\">Ph\u1ea3i d\u00f9ng m\u00e1y bi\u1ebfn th\u1ebf v\u1edbi c\u00e1c cu\u1ed9n d\u00e2y c\u00f3 s\u1ed1 v\u00f2ng d\u00e2y theo t\u1ef7 l\u1ec7 l\u00e0:<\/p>\n<p dir=\"ltr\">U2\/U1= N2\/N1 = 10<\/p>\n<p dir=\"ltr\">Cu\u1ed9n d\u00e2y c\u00f3 \u00edt v\u00f2ng \u0111\u01b0\u1ee3c m\u1eafc v\u00e0o hai c\u1ef1c c\u1ee7a m\u00e1y ph\u00e1t \u0111i\u1ec7n.<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5189%\">\n<p style=\"text-align: center\">C\u00d9NG B\u00c9 H\u1eccC TO\u00c1N SONG NG\u1eee &#8211; PH\u00c1T TRI\u1ec2N T\u01af DUY N\u00c3O B\u1ed8 CH\u1ec8 V\u1edaI 2K\/NG\u00c0Y KHI T\u1ea2I APP MONKEY MATH<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/timhieungay.png\" alt=\"\" width=\"185\" height=\"38\"><\/p>\n<\/td>\n<\/tr>\n<\/table>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_ve_may_bien_the_Vat_Ly_9_tu_luyen\"><\/span>B\u00e0i t\u1eadp v\u1ec1 m\u00e1y bi\u1ebfn th\u1ebf V\u1eadt L\u00fd 9 t\u1ef1 luy\u1ec7n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Ngo\u00e0i b\u00e0i t\u1eadp trong SGK V\u1eadt L\u00fd 9, d\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 m\u1eabu b\u00e0i t\u1eadp li\u00ean quan \u0111\u1ec3 c\u00e1c em c\u00f3 th\u1ec3 v\u1eadn d\u1ee5ng l\u00fd thuy\u1ebft v\u00e0o th\u1ef1c h\u00e0nh hi\u1ec7u qu\u1ea3 h\u01a1n:<\/p>\n<p class=\"MsoNormal\">C\u00e2u 1: M\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf cu\u1ed9n s\u01a1 c\u1ea5p l\u00e0 220V, s\u1ed1 v\u00f2ng cu\u1ed9n s\u01a1 c\u1ea5p l\u00e0 500 v\u00f2ng, hi\u1ec7u \u0111i\u1ec7n th\u1ebf cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 110V. H\u1ecfi s\u1ed1 v\u00f2ng c\u1ee7a cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 bao nhi\u00eau v\u00f2ng?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 2\u00a0: M\u00e1y bi\u1ebfn th\u1ebf d\u00f9ng \u0111\u1ec3 bi\u1ebfn \u0111\u1ed7i hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay hi\u1ec1u 110v l\u00ean 220v. BI\u1ebft cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 10.000 v\u00f2ng<\/p>\n<p class=\"MsoNormal\">a. T\u00ecm s\u1ed1 v\u00f2ng cu\u1ed9n s\u01a1 c\u1ea5p<\/p>\n<p class=\"MsoNormal\">b.D\u00f9ng m\u00e1y bi\u1ebfn th\u1ebf tr\u00ean \u0111\u1ec3 bi\u1ebfn \u0111\u1ed5i hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u0103cquy 12v l\u00ean 60v\u0111\u01b0\u1ee3c kh\u00f4ng? t\u1ea1i sao?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 3\u00a0: Hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p m\u00e1y bi\u1ebfn th\u1ebf cho ra hi\u1ec7u \u0111i\u1ec7n th\u1ebf 30v. Hi\u1ec7u \u0111i\u1ec7n th\u1ebf cu\u1ed9n s\u01a1 c\u1ea5p l\u00e0 bao nhi\u00eau? Cho bi\u1ebft cu\u1ed9n s\u01a1 c\u1ea5p c\u00f3 1200 v\u00f2ng d\u00e2y v\u00e0 cu\u1ed9n thu&#8217; c\u1ea5p c\u00f3 300 v\u00f2ng. M\u00e1ybi\u1ebfn t\u00e9\u1ebf n\u00e0y l\u00e0 m\u00e1y t\u0103ng hay h\u1ea1 th\u1ebf?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 4:\u00a0Cu\u1ed9n s\u01a1 c\u1ea5p c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf c\u00f3 4 400 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 240 v\u00f2ng. Khi \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u 220V th\u00ec \u1edf hai \u0111\u1ea7u d\u00e2y cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 bao nhi\u00eau?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 5:\u00a0V\u00ec sao kh\u00f4ng th\u1ec3 d\u00f9ng d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u kh\u00f4ng \u0111\u1ed5i \u0111\u1ec3 ch\u1ea1y m\u00e1y bi\u1ebfn th\u1ebf?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 6:\u00a0M\u1ed9t m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u cho m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf hai c\u1ef1c c\u1ee7a m\u00e1y l\u00e0 2 000 V. Mu\u1ed1n t\u1ea3i \u0111i\u1ec7n n\u0103ng \u0111i xa, ng\u01b0\u1eddi ta ph\u1ea3i t\u0103ng hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00ean 20 000 V. H\u1ecfi ph\u1ea3i d\u00f9ng lo\u1ea1i m\u00e1y bi\u1ebfn th\u1ebf v\u1edbi c\u00e1c cu\u1ed9n d\u00e2y c\u00f3 s\u1ed1 v\u00f2ng d\u00e2y theo t\u1ec9 l\u1ec7 n\u00e0o ? Cu\u1ed9n d\u00e2y n\u00e0o m\u1eafc v\u00e0o hai c\u1ef1c c\u1ee7a m\u00e1y ph\u00e1t \u0111i\u1ec7n ?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 7:\u00a0Cu\u1ed9n s\u01a1 c\u1ea5p c\u1ee7a m\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf c\u00f3 N1 = 5000 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 N2 = 625 v\u00f2ng. N\u1ed1i hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p v\u00e0o m\u1ea1ng \u0111i\u1ec7n c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf U1 = 220V.<\/p>\n<p class=\"MsoNormal\">a) T\u00ednh hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p.<\/p>\n<p class=\"MsoNormal\">b) T\u00ednh d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n th\u1ee9 c\u1ea5p n\u1ebfu n\u1ed1i hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p v\u1edbi \u0111i\u1ec7n tr\u1edf 137,5 \u03a9. Coi \u0111i\u1ec7n n\u0103ng kh\u00f4ng b\u1ecb m\u1ea5t m\u00e1t.<\/p>\n<p class=\"MsoNormal\">C\u00e2u 8:\u00a0M\u1eafc v\u00f4n k\u1ebf v\u00e0o hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p c\u1ee7a m\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf th\u00ec th\u1ea5y v\u00f4n k\u1ebf ch\u1ec9 9V. Bi\u1ebft hi\u1ec7u \u0111i\u1ec7n th\u1ebf c\u1ee7a hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p l\u00e0 360V. H\u1ecfi:<\/p>\n<p class=\"MsoNormal\">a) Bi\u1ebfn th\u1ebf n\u00f3i tr\u00ean l\u00e0 bi\u1ebfn th\u1ebf t\u0103ng hay gi\u1ea3m th\u1ebf?<\/p>\n<p class=\"MsoNormal\">b) Bi\u1ebft cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 42 v\u00f2ng. T\u00ednh s\u1ed1 v\u00f2ng d\u00e2y \u1edf cu\u1ed9n s\u01a1 c\u1ea5p.<\/p>\n<p class=\"MsoNormal\">C\u00e2u 9: M\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf c\u00f3 s\u1ed1 v\u00f2ng d\u00e2y \u1edf cu\u1ed9c s\u01a1 c\u1ea5p l\u00e0 1000 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 1600 v\u00f2ng. \u0110\u1eb7t \u1edf \u0111\u1ea7u \u0111\u01b0\u1eddng d\u00e2y t\u1ea3i \u0111i\u1ec7n \u0111\u1ec3 truy\u1ec1n \u0111i m\u1ed9t c\u00f4ng su\u1ea5t l\u00e0 1100KW bi\u1ebft hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 110V.<\/p>\n<p class=\"MsoNormal\">a) T\u00ednh hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf cu\u1ed9n s\u01a1 c\u1ea5p<\/p>\n<p class=\"MsoNormal\">b) Cho R = 50 \u00f4m. T\u00ednh c\u00f4ng su\u1ea5t hao ph\u00ed do t\u1ecfa nhi\u1ec7t \u0111\u01b0\u1eddng d\u00e2y.<\/p>\n<p class=\"MsoNormal\">C\u00e2u 10: M\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf g\u1ed3m cu\u1ed9n s\u01a1 c\u1ea5p 500 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p 25000 v\u00f2ng. Hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u0111\u1eb7t v\u00e0o hai cu\u1ed9n s\u01a1 c\u1ea5p l\u00e0 5000V. T\u00ednh hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 11: Cu\u1ed9n s\u01a1 c\u1ea5p c\u1ee7a m\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf c\u00f3 4400 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 220 v\u00f2ng. N\u1ed1i hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p v\u1edbi m\u1ea1ng \u0111i\u1ec7n c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf U1 = 220V. Hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf gi\u1eefa hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 bao nhi\u00eau?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 12: M\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf g\u1ed3m cu\u1ed9n s\u01a1 c\u1ea5p c\u00f3 500 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 40 000 v\u00f2ng. N\u1ed1i hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p v\u1edbi m\u1ea1ng \u0111i\u1ec7n c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf U1 = 220V. Hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf gi\u1eefa hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 bao nhi\u00eau? M\u00e1y bi\u1ebfn th\u1ebf n\u00e0y l\u00e0 m\u00e1y t\u0103ng th\u1ebf hay m\u00e1y h\u1ea1 th\u1ebf?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 13: Cu\u1ed9n s\u01a1 c\u1ea5p c\u1ee7a m\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf c\u00f3 8 000 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 400 v\u00f2ng. Khi \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u 180 V th\u00ec \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y th\u1ee9 c\u1ea5p c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 bao nhi\u00eau? M\u00e1y bi\u1ebfn th\u1ebf n\u00e0y l\u00e0 m\u00e1y t\u0103ng th\u1ebf hay m\u00e1y h\u1ea1 th\u1ebf?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 14: Cu\u1ed9n s\u01a1 c\u1ea5p c\u1ee7a m\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf c\u00f3 1000 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 500 v\u00f2ng. N\u1ed1i hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p v\u1edbi m\u1ea1ng \u0111i\u1ec7n c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf U1 = 220V. C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 bao nhi\u00eau n\u1ebfu n\u1ed1i hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p v\u1edbi m\u1ed9t \u0111i\u1ec7n tr\u1edf c\u00f3 gi\u00e1 tr\u1ecb R = 10\u03a9?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 15: Cu\u1ed9n s\u01a1 c\u1ea5p c\u1ee7a m\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf c\u00f3 4000 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 2000 v\u00f2ng. N\u1ed1i hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p v\u1edbi m\u1ea1ng \u0111i\u1ec7n c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf U1 = 220V. C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 bao nhi\u00eau n\u1ebfu n\u1ed1i hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p v\u1edbi m\u1ed9t b\u00f3ng \u0111\u00e8n c\u00f3 c\u00f4ng su\u1ea5t P = 40W?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 16: M\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf g\u1ed3m cu\u1ed9n s\u01a1 c\u1ea5p c\u00f3 1000 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 500 v\u00f2ng. Khi \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u U1 = 220V th\u00ec \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y th\u1ee9 c\u1ea5p c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 bao nhi\u00eau? M\u00e1y bi\u1ebfn th\u1ebf n\u00e0y l\u00e0 m\u00e1y t\u0103ng th\u1ebf hay m\u00e1y h\u1ea1 th\u1ebf? N\u1ebfu n\u1ed1i hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p v\u1edbi m\u1ed9t \u0111i\u1ec7n tr\u1edf c\u00f3 gi\u00e1 tr\u1ecb R = 10\u03a9 th\u00ec c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 bao nhi\u00eau?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 17: M\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf g\u1ed3m cu\u1ed9n s\u01a1 c\u1ea5p c\u00f3 2000 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 1000 v\u00f2ng. Khi \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u U1 = 220V th\u00ec \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y th\u1ee9 c\u1ea5p c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 bao nhi\u00eau? M\u00e1y bi\u1ebfn th\u1ebf n\u00e0y l\u00e0 m\u00e1y t\u0103ng th\u1ebf hay m\u00e1y h\u1ea1 th\u1ebf? N\u1ebfu n\u1ed1i hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p v\u1edbi m\u1ed9t b\u00f3ng \u0111\u00e8n c\u00f3 c\u00f4ng su\u1ea5t P = 60W th\u00ec c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 bao nhi\u00eau?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 18: M\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf g\u1ed3m cu\u1ed9n s\u01a1 c\u1ea5p c\u00f3 1000 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 500 v\u00f2ng. Khi \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u U1 = 12V th\u00ec \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y th\u1ee9 c\u1ea5p c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 bao nhi\u00eau? M\u00e1y bi\u1ebfn th\u1ebf n\u00e0y l\u00e0 m\u00e1y t\u0103ng th\u1ebf hay m\u00e1y h\u1ea1 th\u1ebf? N\u1ebfu n\u1ed1i hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p v\u1edbi m\u1ed9t \u0111i\u1ec7n tr\u1edf c\u00f3 gi\u00e1 tr\u1ecb R = 20\u03a9 th\u00ec c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 bao nhi\u00eau?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 19: M\u1ed9t m\u00e1y bi\u1ebfn th\u1ebf g\u1ed3m cu\u1ed9n s\u01a1 c\u1ea5p c\u00f3 2000 v\u00f2ng, cu\u1ed9n th\u1ee9 c\u1ea5p c\u00f3 1000 v\u00f2ng. Khi \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u cu\u1ed9n s\u01a1 c\u1ea5p m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u U1 = 12V th\u00ec \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y th\u1ee9 c\u1ea5p c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 bao nhi\u00eau? M\u00e1y bi\u1ebfn th\u1ebf n\u00e0y l\u00e0 m\u00e1y t\u0103ng th\u1ebf hay m\u00e1y h\u1ea1 th\u1ebf? N\u1ebfu n\u1ed1i hai \u0111\u1ea7u cu\u1ed9n th\u1ee9 c\u1ea5p v\u1edbi m\u1ed9t b\u00f3ng \u0111\u00e8n c\u00f3 c\u00f4ng su\u1ea5t P = 40W th\u00ec c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n th\u1ee9 c\u1ea5p l\u00e0 bao nhi\u00eau?<\/p>\n<p class=\"MsoNormal\">C\u00e2u 20:\u00a0\u0110\u1ec3 th\u1eafp s\u00e1ng b\u00f3ng \u0111\u00e8n c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u0111\u1ecbnh m\u1ee9c l\u00e0 220 V, ng\u01b0\u1eddi ta s\u1eed d\u1ee5ng m\u00e1y bi\u1ebfn th\u1ebf \u0111\u1ec3 gi\u1ea3m hi\u1ec7u \u0111i\u1ec7n th\u1ebf t\u1eeb 1100 V xu\u1ed1ng 220 V. S\u1ed1 v\u00f2ng d\u00e2y c\u1ee7a cu\u1ed9n s\u01a1 c\u1ea5p v\u00e0 cu\u1ed9n th\u1ee9 c\u1ea5p c\u1ee7a m\u00e1y bi\u1ebfn th\u1ebf n\u00e0y c\u00f3 t\u1ec9 s\u1ed1 l\u00e0 bao nhi\u00eau?<\/p>\n<h2 class=\"MsoNormal\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/p>\n<p dir=\"ltr\">C\u00e1c ki\u1ebfn th\u1ee9c li\u00ean quan \u0111\u1ebfn b\u00e0i m\u00e1y bi\u1ebfn th\u1ebf \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp \u0111\u1ea7y \u0111\u1ee7 v\u00e0 chi ti\u1ebft trong b\u00e0i vi\u1ebft tr\u00ean. Ph\u1ea7n b\u00e0i t\u1eadp c\u1ee7ng c\u1ed1 v\u1edbi l\u1eddi gi\u1ea3i \u0111i k\u00e8m s\u1ebd gi\u00fap c\u00e1c em n\u1eafm ch\u1eafc ki\u1ebfn th\u1ee9c m\u1ed9t c\u00e1ch t\u1ed1t nh\u1ea5t. Ch\u00fac c\u00e1c em h\u1ecdc t\u1ed1t.<\/p>\n<p>Ngu\u1ed3n: <a href=\"http:\/\/www.ckconitsha.com\/vn\/\">http:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>M\u00e1y bi\u1ebfn th\u1ebf \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong th\u1ef1c t\u1ebf, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong ng\u00e0nh \u0111i\u1ec7n. Do \u0111\u00f3, vi\u1ec7c h\u1ecdc t\u1eadp c\u00e1c ki\u1ebfn th\u1ee9c li\u00ean quan \u0111\u1ebfn m\u00e1y bi\u1ebfn th\u1ebf kh\u00f4ng ch\u1ec9 gi\u00fap c\u00e1c em ho\u00e0n th\u00e0nh th\u1eadt t\u1ed1t ch\u01b0\u01a1ng tr\u00ecnh V\u1eadt L\u00fd 9, m\u00e0 c\u00f2n h\u1ed7 tr\u1ee3 c\u00e1c em trong vi\u1ec7c t\u01b0 duy,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-27281","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/27281","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=27281"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/27281\/revisions"}],"predecessor-version":[{"id":28658,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/27281\/revisions\/28658"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=27281"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=27281"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=27281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}