{"id":19623,"date":"2025-07-07T08:30:05","date_gmt":"2025-07-07T01:30:05","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=19623"},"modified":"2025-07-09T21:35:00","modified_gmt":"2025-07-09T14:35:00","slug":"dinh-luat-jun-len-xo-cho-biet-dieu-gi-he-thuc-jun-len-xo-bai-tap-van-dung-vat-ly-9","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/dinh-luat-jun-len-xo-cho-biet-dieu-gi-he-thuc-jun-len-xo-bai-tap-van-dung-vat-ly-9\/","title":{"rendered":"\u0110\u1ecbnh lu\u1eadt jun len x\u01a1 cho bi\u1ebft \u0111i\u1ec1u g\u00ec? H\u1ec7 th\u1ee9c jun len x\u01a1 &amp; b\u00e0i t\u1eadp v\u1eadn d\u1ee5ng (v\u1eadt 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\/dinh-luat-jun-len-xo-cho-biet-dieu-gi-he-thuc-jun-len-xo-bai-tap-van-dung-vat-ly-9\/#Truong_hop_dien_nang_bien_doi_thanh_nhiet_nang\" >Tr\u01b0\u1eddng h\u1ee3p \u0111i\u1ec7n n\u0103ng bi\u1ebfn \u0111\u1ed5i th\u00e0nh nhi\u1ec7t n\u0103ng\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\/dinh-luat-jun-len-xo-cho-biet-dieu-gi-he-thuc-jun-len-xo-bai-tap-van-dung-vat-ly-9\/#Phat_bieu_noi_dung_dinh_luat_jun_len_xo\" >Ph\u00e1t bi\u1ec3u n\u1ed9i dung \u0111\u1ecbnh lu\u1eadt jun len x\u01a1\u00a0<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/dinh-luat-jun-len-xo-cho-biet-dieu-gi-he-thuc-jun-len-xo-bai-tap-van-dung-vat-ly-9\/#Su_ra_doi_cua_dinh_luat_Jun_len_xo\" >S\u1ef1 ra \u0111\u1eddi c\u1ee7a \u0111\u1ecbnh lu\u1eadt Jun len x\u01a1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/dinh-luat-jun-len-xo-cho-biet-dieu-gi-he-thuc-jun-len-xo-bai-tap-van-dung-vat-ly-9\/#i\" >\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/dinh-luat-jun-len-xo-cho-biet-dieu-gi-he-thuc-jun-len-xo-bai-tap-van-dung-vat-ly-9\/#Phat_bieu_dinh_luat\" >Ph\u00e1t bi\u1ec3u \u0111\u1ecbnh lu\u1eadt\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/dinh-luat-jun-len-xo-cho-biet-dieu-gi-he-thuc-jun-len-xo-bai-tap-van-dung-vat-ly-9\/#Dinh_luat_jun_len_xo_cho_biet_dieu_gi\" >\u0110\u1ecbnh lu\u1eadt jun len x\u01a1 cho bi\u1ebft \u0111i\u1ec1u g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/dinh-luat-jun-len-xo-cho-biet-dieu-gi-he-thuc-jun-len-xo-bai-tap-van-dung-vat-ly-9\/#He_thuc_dinh_luat_Jun_Len_xo\" >H\u1ec7 th\u1ee9c \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1<\/a><\/li><\/ul><\/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\/dinh-luat-jun-len-xo-cho-biet-dieu-gi-he-thuc-jun-len-xo-bai-tap-van-dung-vat-ly-9\/#Ung_dung_dinh_luat_jun_len_xo\" >\u1ee8ng d\u1ee5ng \u0111\u1ecbnh lu\u1eadt jun len x\u01a1\u00a0<\/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\/dinh-luat-jun-len-xo-cho-biet-dieu-gi-he-thuc-jun-len-xo-bai-tap-van-dung-vat-ly-9\/#Bai_tap_van_dung_dinh_luat_Jun_Len_xo\" >B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1\u00a0<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p dir=\"ltr\">Trong ch\u01b0\u01a1ng tr\u00ecnh V\u1eadt l\u00fd 9 n\u00f3i ri\u00eang v\u00e0 ch\u01b0\u01a1ng tr\u00ecnh v\u1eadt l\u00fd ph\u1ed5 th\u00f4ng, \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ef1c k\u1ef3 quan tr\u1ecdng, y\u00eau c\u1ea7u c\u00e1c b\u1ea1n h\u1ecdc sinh c\u1ea7n n\u1eafm r\u00f5 v\u00e0 hi\u1ec3u s\u00e2u s\u1eafc to\u00e0n b\u1ed9 ki\u1ebfn th\u1ee9c. V\u1eady \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1 l\u00e0 g\u00ec? \u0110\u00e2u l\u00e0 ph\u00e1t bi\u1ec3u \u0111\u00fang nh\u1ea5t v\u1ec1 \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1? \u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1 l\u00e0 g\u00ec? T\u1ea5t c\u1ea3 nh\u1eefng c\u00e2u h\u1ecfi tr\u00ean s\u1ebd \u0111\u01b0\u1ee3c Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef gi\u1ea3i \u0111\u00e1p m\u1ed9t c\u00e1ch chi ti\u1ebft trong b\u00e0i vi\u1ebft sau \u0111\u00e2y.\u00a0<\/p>\n<p>                                                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img_default\/monkey3.png\" alt=\"\"><\/p>\n<p class=\"title\">H\u00e0ng tri\u1ec7u tr\u1ebb em \u0111\u00e3 ph\u00e1t tri\u1ec3n kh\u1ea3 n\u0103ng ng\u00f4n ng\u1eef c\u1ee7a m\u00ecnh th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp c\u1ee7a Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef<\/p>\n<p class=\"description\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 \u0111\u01b0\u1ee3c Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u1ec1 s\u1ea3n ph\u1ea9m v\u00e0 l\u1ed9 tr\u00ecnh h\u1ecdc cho con.<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i h\u1ecd t\u00ean<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i S\u0110T<\/p>\n<p>                                                                                Th\u00e0nh th\u1ea1o 2.000+ t\u1eeb &amp; 6.000 c\u00e2u ti\u1ebfng anh<br \/>\n                                                                                Ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n 4 k\u1ef9 n\u0103ng ti\u1ebfng anh<br \/>\n                                                                                Gi\u1ecfi To\u00e1n &#8211; ti\u1ebfng Anh theo ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7n \u0111\u1ea1i<br \/>\n                                                                                Ph\u00e1t tri\u1ec3n EQ &amp; kh\u1ea3 n\u0103ng ti\u1ebfng Vi\u1ec7t<\/p>\n<p>                                                                                *B\u1ea1n ch\u01b0a ch\u1ecdn m\u1ee5c n\u00e0o!<\/p>\n<p>                                                                    \u0110\u0103ng K\u00fd T\u01b0 V\u1ea5n Mi\u1ec5n Ph\u00ed<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Truong_hop_dien_nang_bien_doi_thanh_nhiet_nang\"><\/span>Tr\u01b0\u1eddng h\u1ee3p \u0111i\u1ec7n n\u0103ng bi\u1ebfn \u0111\u1ed5i th\u00e0nh nhi\u1ec7t n\u0103ng\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap c\u00e1c em hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd cung c\u1ea5p m\u1ed9t s\u1ed1 th\u00f4ng tin c\u01a1 b\u1ea3n v\u1ec1 \u0111i\u1ec7n n\u0103ng.\u00a0<\/p>\n<p dir=\"ltr\">\u0110i\u1ec7n n\u0103ng hay n\u00f3i c\u00e1ch kh\u00e1c ch\u00ednh l\u00e0 n\u0103ng l\u01b0\u1ee3ng c\u1ee7a d\u00f2ng \u0111i\u1ec7n. C\u00e1c em c\u1ea7n l\u01b0u \u00fd r\u1eb1ng d\u00f2ng \u0111i\u1ec7n lu\u00f4n mang theo m\u1ed9t n\u0103ng l\u01b0\u1ee3ng nh\u1ea5t \u0111\u1ecbnh. Nguy\u00ean nh\u00e2n l\u00e0 v\u00ec \u0111i\u1ec7n c\u00f3 kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n c\u00f4ng v\u00e0 thay \u0111\u1ed5i nhi\u1ec7t n\u0103ng c\u1ee7a v\u1eadt.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dinh-luat-jun-len-xo-2.jpg\" alt=\"\u0110i\u1ec7n n\u0103ng l\u00e0 n\u0103ng l\u01b0\u1ee3ng c\u1ee7a d\u00f2ng \u0111i\u1ec7n. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"800\" height=\"376\"><\/p>\n<p dir=\"ltr\">C\u00f3 th\u1ec3 quan s\u00e1t m\u1ed9t s\u1ed1 c\u00e1c thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng \u0111i\u1ec7n trong \u0111\u1eddi s\u1ed1ng h\u1eb1ng ng\u00e0y. Qua quan s\u00e1t, c\u00e1c em s\u1ebd nh\u1eadn th\u1ea5y s\u1ef1 n\u00f3ng l\u00ean c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n khi s\u1eed d\u1ee5ng l\u00e2u nh\u01b0 m\u00e1y t\u00ednh, tivi, b\u00f3ng \u0111\u00e8n, qu\u1ea1t,&#8230;. \u0110\u00e2y l\u00e0 t\u00ednh ch\u1ea5t \u0111i\u1ec7n n\u0103ng c\u00f3 th\u1ec3 l\u00e0m v\u1eadt thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9.<\/p>\n<p dir=\"ltr\">N\u0103ng l\u01b0\u1ee3ng kh\u00f4ng t\u1ef1 nhi\u00ean sinh ra v\u00e0 m\u1ea5t \u0111i, ch\u00fang ch\u1ec9 chuy\u1ec3n t\u1eeb d\u1ea1ng n\u00e0y sang d\u1ea1ng kh\u00e1c. \u0110i\u1ec7n n\u0103ng c\u0169ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady &#8211; s\u1ebd c\u00f3 s\u1ef1 chuy\u1ec3n bi\u1ebfn c\u00e1c d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng n\u1ebfu \u0111i\u1ec7n sinh ra qu\u00e1 nhi\u1ec1u trong c\u00f9ng m\u1ed9t th\u1eddi \u0111i\u1ec3m. \u0110i\u1ec7n n\u0103ng s\u1ebd chuy\u1ec3n h\u00f3a th\u00e0nh c\u00e1c d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng v\u00f4 \u00edch ho\u1eb7c c\u00f3 \u00edch.\u00a0<\/p>\n<p dir=\"ltr\">\u0110i\u1ec7n n\u0103ng \u0111\u01b0\u1ee3c sinh ra kh\u00f4ng ch\u1ec9 d\u00f9ng to\u00e0n b\u1ed9 cho vi\u1ec7c v\u1eadn h\u00e0nh c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n, m\u00e0 m\u1ed9t ph\u1ea7n \u0111i\u1ec7n n\u0103ng \u0111\u01b0\u1ee3c sinh ra c\u0169ng c\u00f3 th\u1ec3 bi\u1ebfn \u0111\u1ed5i sang m\u1ed9t d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng kh\u00e1c, \u0111i\u1ec3n h\u00ecnh nh\u1ea5t l\u00e0 \u0111i\u1ec7n n\u0103ng chuy\u1ec3n h\u00f3a th\u00e0nh nhi\u1ec7t n\u0103ng.\u00a0<\/p>\n<p dir=\"ltr\">C\u00f3 2 tr\u01b0\u1eddng h\u1ee3p x\u1ea3y ra:\u00a0<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110i\u1ec7n n\u0103ng bi\u1ebfn \u0111\u1ed5i m\u1ed9t ph\u1ea7n th\u00e0nh nhi\u1ec7t n\u0103ng\u00a0<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110i\u1ec7n n\u0103ng bi\u1ebfn \u0111\u1ed5i to\u00e0n b\u1ed9 th\u00e0nh nhi\u1ec7t n\u0103ng<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">\u0110i\u1ec7n n\u0103ng bi\u1ebfn \u0111\u1ed5i m\u1ed9t ph\u1ea7n th\u00e0nh nhi\u1ec7t n\u0103ng: Tr\u01b0\u1eddng h\u1ee3p n\u00e0y ch\u1ec9 c\u00f3 m\u1ed9t ph\u1ea7n \u0111i\u1ec7n n\u0103ng sinh ra chuy\u1ec3n h\u00f3a th\u00e0nh nhi\u1ec7t n\u0103ng.\u00a0<\/p>\n<p dir=\"ltr\">Ph\u1ea7n c\u00f2n l\u1ea1i s\u1ebd bi\u1ebfn \u0111\u1ed5i th\u00e0nh c\u00e1c d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng \u00e1nh s\u00e1ng ho\u1eb7c c\u01a1 n\u0103ng. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t th\u01b0\u1eddng \u1ee9ng d\u1ee5ng t\u00ednh ch\u1ea5t n\u00e0y \u0111\u1ec3 s\u1ea3n xu\u1ea5t ra c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n s\u1eed d\u1ee5ng cho \u0111\u1eddi s\u1ed1ng h\u1eb1ng ng\u00e0y nh\u01b0:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110i\u1ec7n n\u0103ng chuy\u1ec3n h\u00f3a th\u00e0nh nhi\u1ec7t n\u0103ng v\u00e0 c\u01a1 n\u0103ng: m\u00e1y khoan, qu\u1ea1t \u0111i\u1ec7n, m\u00e1y b\u01a1m n\u01b0\u1edbc,\u2026<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110i\u1ec7n n\u0103ng chuy\u1ec3n h\u00f3a th\u00e0nh nhi\u1ec7t n\u0103ng v\u00e0 \u00e1nh s\u00e1ng: \u0111\u00e8n led, \u0111\u00e8n hu\u1ef3nh quang, b\u00f3ng \u0111\u00e8n d\u00e2y t\u00f3c, \u2026<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dinh-luat-jun-len-xo-3.jpg\" alt=\"\u0110i\u1ec7n n\u0103ng bi\u1ebfn \u0111\u1ed5i m\u1ed9t ph\u1ea7n th\u00e0nh nhi\u1ec7t n\u0103ng. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"800\" height=\"584\"><\/p>\n<p dir=\"ltr\">\u0110i\u1ec7n n\u0103ng bi\u1ebfn \u0111\u1ed5i ho\u00e0n to\u00e0n th\u00e0nh nhi\u1ec7t n\u0103ng: Kh\u00e1c v\u1edbi tr\u01b0\u1eddng h\u1ee3p m\u1ed9t ph\u1ea7n \u0111i\u1ec7n n\u0103ng chuy\u1ec3n h\u00f3a th\u00e0nh nhi\u1ec7t n\u0103ng, khi to\u00e0n b\u1ed9 \u0111i\u1ec7n n\u0103ng \u0111\u01b0\u1ee3c sinh ra \u0111\u1ec1u chuy\u1ec3n h\u00f3a th\u00e0nh nhi\u1ec7t n\u0103ng th\u00ec s\u1ebd kh\u00f4ng c\u00f2n x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng bi\u1ebfn \u0111\u1ed5i th\u00e0nh c\u00e1c d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng nh\u01b0 \u00e1nh s\u00e1ng hay c\u01a1 n\u0103ng n\u1eefa.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: N\u1ed3i c\u01a1m \u0111i\u1ec7n, m\u00e1y t\u1eafm n\u01b0\u1edbc n\u00f3ng, b\u00e0n l\u00e0, b\u00ecnh \u0111un n\u01b0\u1edbc b\u1eb1ng \u0111i\u1ec7n,\u2026 C\u00e1c v\u1eadt d\u1ee5ng n\u00e0y c\u00f3 m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m chung \u0111\u00f3 l\u00e0 kh\u1ea3 n\u0103ng t\u1ecfa ra m\u1ed9t l\u01b0\u1ee3ng nhi\u1ec7t r\u1ea5t l\u1edbn.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dinh-luat-jun-len-xo-4.jpg\" alt=\"\u0110i\u1ec7n n\u0103ng bi\u1ebfn \u0111\u1ed5i ho\u00e0n to\u00e0n th\u00e0nh nhi\u1ec7t n\u0103ng. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"800\" height=\"584\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phat_bieu_noi_dung_dinh_luat_jun_len_xo\"><\/span>Ph\u00e1t bi\u1ec3u n\u1ed9i dung \u0111\u1ecbnh lu\u1eadt jun len x\u01a1\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u00e1c th\u00f4ng tin c\u1ea7n thi\u1ebft khi t\u00ecm hi\u1ec3u v\u1ec1 \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Su_ra_doi_cua_dinh_luat_Jun_len_xo\"><\/span>S\u1ef1 ra \u0111\u1eddi c\u1ee7a \u0111\u1ecbnh lu\u1eadt Jun len x\u01a1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"i\"><\/span><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dinh-luat-jun-len-xo-5.jpg\" alt=\"S\u1ef1 ra \u0111\u1eddi c\u1ee7a \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"800\" height=\"533\">\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">N\u0103m 1841, khi v\u1eabn c\u00f2n l\u00e0 m\u1ed9t nh\u00e0 nghi\u00ean c\u1ee9u nghi\u1ec7p d\u01b0, Jun \u0111\u00e3 b\u1eaft \u0111\u1ea7u qu\u00e1 tr\u00ecnh nghi\u00ean c\u1ee9u s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a d\u00f2ng \u0111i\u1ec7n tr\u00ean c\u01a1 s\u1edf l\u00e0 nh\u1eefng k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u1ee7a b\u1ea3n th\u00e2n.\u00a0<\/p>\n<p dir=\"ltr\">B\u00ean c\u1ea1nh \u0111\u00f3, Jun c\u00f2n d\u1ef1a v\u00e0o nh\u1eefng g\u1ee3i \u00fd c\u1ee7a Faraday v\u00e0 nhi\u1ec1u nh\u00e0 v\u1eadt l\u00fd h\u1ecdc kh\u00e1c. Sau nhi\u1ec1u n\u0103m t\u00ecm t\u00f2i v\u00e0 nghi\u00ean c\u1ee9u, nh\u00e0 v\u1eadt l\u00fd Jun \u0111\u00e3 ph\u00e1t hi\u1ec7n ra m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n v\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra t\u1eeb d\u00e2y d\u1eabn. T\u1eeb \u0111\u00f3, ph\u00e1t bi\u1ec3u Jun \u0111\u01b0\u1ee3c ra \u0111\u1eddi.\u00a0<\/p>\n<p dir=\"ltr\">Cho \u0111\u1ebfn n\u0103m 1844, nh\u00e0 v\u1eadt l\u00fd h\u1ecdc Len x\u01a1 c\u0169ng \u0111\u00e3 b\u1eaft tay v\u00e0o th\u1ef1c hi\u1ec7n m\u1ed9t lo\u1ea1t c\u00e1c th\u00ed nghi\u1ec7m nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t bi\u1ec3u th\u00e0nh \u0111\u1ecbnh lu\u1eadt Len x\u01a1 t\u01b0\u01a1ng \u0111\u1ed3ng v\u1edbi \u0111\u1ecbnh lu\u1eadt Jun tr\u01b0\u1edbc \u0111\u00f3. V\u00ec v\u1eady, \u0111\u1ecbnh lu\u1eadt sau c\u00f9ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ecbnh lu\u1eadt Jun-len-x\u01a1.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phat_bieu_dinh_luat\"><\/span>Ph\u00e1t bi\u1ec3u \u0111\u1ecbnh lu\u1eadt\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ecbnh lu\u1eadt Jun Len x\u01a1 \u0111\u01b0\u1ee3c ph\u00e1t bi\u1ec3u nh\u01b0 sau: <em>Nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra \u1edf d\u00e2y d\u1eabn khi c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi b\u00ecnh ph\u01b0\u01a1ng c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n, v\u1edbi \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn v\u00e0 th\u1eddi gian d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dinh_luat_jun_len_xo_cho_biet_dieu_gi\"><\/span>\u0110\u1ecbnh lu\u1eadt jun len x\u01a1 cho bi\u1ebft \u0111i\u1ec1u g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ecbnh lu\u1eadt Jun Len x\u01a1 c\u0169ng cho bi\u1ebft r\u1eb1ng \u0111i\u1ec7n n\u0103ng \u0111\u01b0\u1ee3c chuy\u1ec3n h\u00f3a th\u00e0nh nhi\u1ec7t n\u0103ng. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng hi\u1ec7n t\u01b0\u1ee3ng quan tr\u1ecdng trong v\u1eadt l\u00fd c\u0169ng nh\u01b0 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 s\u1ea3n xu\u1ea5t c\u00e1c thi\u1ebft b\u1ecb c\u1ea7n thi\u1ebft trong \u0111\u1eddi s\u1ed1ng.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"He_thuc_dinh_luat_Jun_Len_xo\"><\/span>H\u1ec7 th\u1ee9c \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Qua ph\u00e1t bi\u1ec3u c\u1ee7a \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1, h\u1ec7 th\u1ee9c c\u1ee7a \u0111\u1ecbnh lu\u1eadt nh\u01b0 sau:<\/p>\n<p>\u00a0<\/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\/dinh-luat-jun-lenxo-cong-thuc.JPG\" alt=\"\" width=\"500\" height=\"72\"><\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">R: l\u00e0 \u0111i\u1ec7n tr\u1edf c\u1ee7a v\u1eadt d\u1eabn. \u0110\u01a1n v\u1ecb c\u1ee7a R l\u00e0 Ohm (\u03a9).<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">I: l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua v\u1eadt d\u1eabn. \u0110\u01a1n v\u1ecb c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n l\u00e0 Ampe (A).<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">t: l\u00e0 th\u1eddi gian m\u00e0 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua v\u1eadt d\u1eabn. \u0110\u01a1n v\u1ecb c\u1ee7a th\u1eddi gian l\u00e0 gi\u00e2y (s)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Q: l\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra t\u1eeb v\u1eadt d\u1eabn. \u0110\u01a1n v\u1ecb c\u1ee7a Q l\u00e0 Jun (J).<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">L\u01b0u \u00fd: Ngo\u00e0i nh\u1eefng \u0111\u01a1n v\u1ecb \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp nh\u01b0 tr\u00ean th\u00ec khi \u00e1p d\u1ee5ng v\u00e0o gi\u1ea3i c\u00e1c b\u00e0i t\u1eadp t\u00ednh to\u00e1n, c\u00e1c em c\u0169ng c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn m\u1ed1i quan h\u1ec7 gi\u1eefa \u0111\u01a1n v\u1ecb Jun (J) v\u00e0 \u0111\u01a1n v\u1ecb calo (cal). T\u1ef7 l\u1ec7 quy \u0111\u1ed5i nh\u01b0 sau:<\/p>\n<p dir=\"ltr\">1 J = 0,24 cal \u00a0 \u00a0 ;\u00a0 \u00a0 1 cal = 4,18 J<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ung_dung_dinh_luat_jun_len_xo\"><\/span>\u1ee8ng d\u1ee5ng \u0111\u1ecbnh lu\u1eadt jun len x\u01a1\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dinh-luat-jun-len-xo-6.jpg\" alt=\"\u1ee8ng d\u1ee5ng \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1 trong s\u1ea3n xu\u1ea5t c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"800\" height=\"229\"><\/p>\n<p dir=\"ltr\">\u0110\u1ecbnh lu\u1eadt Jun-len-x\u01a1 \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra, c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n tr\u1edf v\u1eadt d\u1eabn.\u00a0\u0110\u00e2y l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 s\u1ea3n xu\u1ea5t ra c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c \u0111\u1ed9 an to\u00e0n v\u00e0 ph\u00f2ng tr\u00e1nh t\u00ecnh tr\u1ea1ng nhi\u1ec7t n\u0103ng qu\u00e1 l\u1edbn g\u00e2y ra ch\u00e1y, n\u1ed5 nguy hi\u1ec3m trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng.<\/p>\n<p dir=\"ltr\">Ngo\u00e0i ra, d\u1ef1a tr\u00ean h\u1ec7 th\u1ee9c c\u1ee7a \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1, c\u00f3 th\u1ec3 t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng nhi\u1ec7t n\u0103ng t\u1ecfa ra c\u1ee7a v\u1eadt. T\u1eeb \u0111\u00f3, ng\u01b0\u1eddi ta s\u1ebd l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u01b0\u1ee3c nh\u1eefng nguy\u00ean v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p v\u1edbi t\u1eebng lo\u1ea1i thi\u1ebft b\u1ecb nh\u1ea5t \u0111\u1ecbnh.\u00a0<\/p>\n<p dir=\"ltr\">Th\u00f4ng th\u01b0\u1eddng, c\u00e1c thi\u1ebft b\u1ecb c\u00f3 \u0111i\u1ec7n n\u0103ng \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh nhi\u1ec7t n\u0103ng s\u1ebd s\u1eed d\u1ee5ng d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb Constantan ho\u1eb7c Nik\u00ealin.<\/p>\n<p dir=\"ltr\">Xem th\u00eam: C\u00f4ng c\u1ee7a d\u00f2ng \u0111i\u1ec7n l\u00e0 g\u00ec ? C\u00f4ng th\u1ee9c t\u00ednh v\u00e0 b\u00e0i t\u1eadp k\u00e8m l\u1eddi gi\u1ea3i SGK<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_van_dung_dinh_luat_Jun_Len_xo\"><\/span>B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap c\u00e1c em hi\u1ec3u r\u00f5 v\u00e0 ghi nh\u1edb c\u00e1c ki\u1ebfn th\u1ee9c l\u00fd thuy\u1ebft m\u1ed9t c\u00e1ch t\u1ed1t nh\u1ea5t, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd cung c\u1ea5p c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp v\u1eadn d\u1ee5ng \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1 th\u01b0\u1eddng g\u1eb7p trong ch\u01b0\u01a1ng tr\u00ecnh V\u1eadt L\u00fd l\u1edbp 9.<\/p>\n<p dir=\"ltr\">B\u00e0i 1: Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y l\u00e0 kh\u00f4ng \u0111\u00fang?<\/p>\n<p dir=\"ltr\">Nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra \u1edf d\u00e2y d\u1eabn khi c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua:<\/p>\n<p dir=\"ltr\">A. T\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n, v\u1edbi \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn v\u1edbi th\u1eddi gian d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua.<\/p>\n<p dir=\"ltr\">B. T\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi b\u00ecnh ph\u01b0\u01a1ng c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n, v\u1edbi \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn v\u00e0 v\u1edbi th\u1eddi gian d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua.<\/p>\n<p dir=\"ltr\">C. T\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi b\u00ecnh ph\u01b0\u01a1ng hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa hai \u0111\u1ea7u d\u00e2y d\u1eabn, v\u1edbi th\u1eddi gian d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua v\u00e0 t\u1ec9 l\u1ec7 ngh\u1ecbch v\u1edbi \u0111i\u1ec7n tr\u1edf d\u00e2y d\u1eabn.<\/p>\n<p dir=\"ltr\">D. T\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa hai \u0111\u1ea7u d\u00e2y d\u1eabn, v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n v\u00e0 v\u1edbi th\u1eddi gian d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua.<\/p>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n: A. (D\u1ef1a v\u00e0o l\u00fd thuy\u1ebft v\u00e0 h\u1ec7 th\u1ee9c v\u1ec1 \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1)<\/p>\n<p dir=\"ltr\">B\u00e0i 2: T\u1ea1i sao v\u1edbi c\u00f9ng m\u1ed9t d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua th\u00ec d\u00e2y t\u00f3c b\u00f3ng \u0111\u00e8n n\u00f3ng l\u00ean t\u1edbi nhi\u1ec7t \u0111\u1ed9 cao c\u00f2n d\u00e2y n\u1ed1i v\u1edbi b\u00f3ng \u0111\u00e8n th\u00ec h\u1ea7u nh\u01b0 kh\u00f4ng n\u00f3ng l\u00ean?<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi:\u00a0<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">V\u00ec d\u00e2y t\u00f3c b\u00f3ng \u0111\u00e8n v\u00e0 d\u00e2y n\u1ed1i m\u1eafc n\u1ed1i ti\u1ebfp nhau n\u00ean d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua c\u1ea3 hai c\u00f3 c\u00f9ng c\u01b0\u1eddng \u0111\u1ed9. Theo \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1, nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra \u1edf d\u00e2y t\u00f3c v\u00e0 \u1edf d\u00e2y n\u1ed1i t\u1ec9 l\u1ec7 v\u1edbi \u0111i\u1ec7n tr\u1edf c\u1ee7a t\u1eebng \u0111o\u1ea1n d\u00e2y.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ngo\u00e0i ra, d\u00e2y t\u00f3c c\u00f3 \u0111i\u1ec7n tr\u1edf l\u1edbn n\u00ean nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra nhi\u1ec1u, do \u0111\u00f3 d\u00e2y t\u00f3c n\u00f3ng l\u00ean \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 ph\u00e1t s\u00e1ng. C\u00f2n d\u00e2y n\u1ed1i c\u00f3 \u0111i\u1ec7n tr\u1edf nh\u1ecf n\u00ean nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra \u00edt v\u00e0 truy\u1ec1n ph\u1ea7n l\u1edbn cho m\u00f4i tr\u01b0\u1eddng xung quanh. V\u00ec v\u1eady, d\u00e2y n\u1ed1i h\u1ea7u nh\u01b0 s\u1ebd kh\u00f4ng n\u00f3ng l\u00ean.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">B\u00e0i 3: M\u1ed9t b\u1ebfp \u0111i\u1ec7n khi ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng c\u00f3 \u0111i\u1ec7n tr\u1edf R = 80\u2126 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n qua b\u1ebfp khi \u0111\u00f3 l\u00e0 I = 2,5A.<\/p>\n<p dir=\"ltr\">a) T\u00ednh nhi\u1ec7t l\u01b0\u1ee3ng m\u00e0 b\u1ebfp t\u1ecfa ra trong 1s.<\/p>\n<p dir=\"ltr\">b) D\u00f9ng b\u1ebfp \u0111i\u1ec7n \u0111\u1ec3 \u0111un s\u00f4i 1,5l n\u01b0\u1edbc c\u00f3 nhi\u1ec7t \u0111\u1ed9 ban \u0111\u1ea7u l\u00e0 25 \u0111\u1ed9 C th\u00ec th\u1eddi gian \u0111un n\u01b0\u1edbc l\u00e0 20 ph\u00fat. Coi r\u1eb1ng nhi\u1ec7t l\u01b0\u1ee3ng cung c\u1ea5p \u0111\u1ec3 \u0111un s\u00f4i n\u01b0\u1edbc l\u00e0 c\u00f3 \u00edch, t\u00ednh hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ebfp. Cho bi\u1ebft nhi\u1ec7t dung ri\u00eang c\u1ee7a n\u01b0\u1edbc l\u00e0 c = 4200J\/kg.K.<\/p>\n<p dir=\"ltr\">c) M\u1ed7i ng\u00e0y s\u1eed d\u1ee5ng b\u1ebfp \u0111i\u1ec7n n\u00e0y 3 gi\u1edd. T\u00ednh ti\u1ec1n \u0111i\u1ec7n ph\u1ea3i tr\u1ea3 cho vi\u1ec7c s\u1eed d\u1ee5ng b\u1ebfp \u0111i\u1ec7n \u0111\u00f3 trong 30 ng\u00e0y, n\u1ebfu gi\u00e1 1kW.h l\u00e0 700 \u0111\u1ed3ng.<\/p>\n<p dir=\"ltr\">B\u00e0i gi\u1ea3i:<\/p>\n<p dir=\"ltr\">a) Nhi\u1ec7t l\u01b0\u1ee3ng m\u00e0 b\u1ebfp t\u1ecfa ra trong 1s l\u00e0:\u00a0<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bai-tap-dinh-luat-jun-lenxo.JPG\" alt=\"\" width=\"261\" height=\"56\">(C\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00f4ng su\u1ea5t t\u1ecfa nhi\u1ec7t c\u1ee7a b\u1ebfp l\u00e0 P = 500W).<\/p>\n<p dir=\"ltr\">b) Nhi\u1ec7t l\u01b0\u1ee3ng m\u00e0 b\u1ebfp t\u1ecfa ra trong 20 ph\u00fat l\u00e0:\u00a0<\/p>\n<p dir=\"ltr\">Qtp = Q.20.60 = 500.20.60 = 600000 (J).<\/p>\n<p dir=\"ltr\">Nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n \u0111\u1ec3 \u0111un s\u00f4i l\u01b0\u1ee3ng n\u01b0\u1edbc \u0111\u00e3 cho l\u00e0:<\/p>\n<p dir=\"ltr\">Qi = c.m.(t2 \u2013 t1) = 4200.1,5.(100-25) = 472500 (J)<\/p>\n<p dir=\"ltr\">\u00a0Hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ebfp l\u00e0: H = Qi\/Qtp = 472500\/600000 = 78,75%.<\/p>\n<p dir=\"ltr\">c) L\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng m\u00e0 b\u1ebfp ti\u00eau th\u1ee5 trong 30 ng\u00e0y (t\u00ednh theo \u0111\u01a1n v\u1ecb kW.h) l\u00e0:<\/p>\n<p dir=\"ltr\">A = P.t = 500.30.3 = 45000 (W.h) = 45 (kW.h)<\/p>\n<p dir=\"ltr\">Ti\u1ec1n \u0111i\u1ec7n ph\u1ea3i tr\u1ea3 cho vi\u1ec7c s\u1eed d\u1ee5ng b\u1ebfp \u0111i\u1ec7n l\u00e0:\u00a0<\/p>\n<p dir=\"ltr\">T = 45.700 = 315000 (\u0111\u1ed3ng).<\/p>\n<p dir=\"ltr\">B\u00e0i 4: Hai \u0111i\u1ec7n tr\u1edf R1 = R2 = 100 \u03a9. Ng\u01b0\u1eddi ta m\u1eafc hai \u0111i\u1ec7n tr\u1edf \u0111\u00f3 l\u1ea7n l\u01b0\u1ee3t b\u1eb1ng hai c\u00e1ch: song song v\u00e0 n\u1ed1i ti\u1ebfp, r\u1ed3i n\u1ed1i v\u00e0o m\u1ea1ch \u0111i\u1ec7n c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf 100V<\/p>\n<p dir=\"ltr\">a) T\u00ednh d\u00f2ng \u0111i\u1ec7n qua c\u00e1c \u0111i\u1ec7n tr\u1edf trong m\u1ed7i tr\u01b0\u1eddng h\u1ee3p.<\/p>\n<p dir=\"ltr\">b) X\u00e1c \u0111\u1ecbnh nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra tr\u00ean m\u1ed7i \u0111i\u1ec7n tr\u1edf trong hai tr\u01b0\u1eddng h\u1ee3p trong th\u1eddi gian 30 ph\u00fat. C\u00f3 nh\u1eadn x\u00e9t g\u00ec v\u1ec1 k\u1ebft qu\u1ea3 t\u00ecm \u0111\u01b0\u1ee3c.<\/p>\n<p dir=\"ltr\">B\u00e0i gi\u1ea3i:<\/p>\n<p dir=\"ltr\">a) Tr\u01b0\u1eddng h\u1ee3p hai \u0111i\u1ec7n tr\u1edf m\u1eafc n\u1ed1i ti\u1ebfp: Rnt = R1 + R2 = 200 (\u03a9).<\/p>\n<ul>\n<li>C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua b\u1ed9 l\u00e0: Int = U\/Rnt = 100\/200 = 0,5(A)<\/li>\n<li>Tr\u01b0\u1eddng h\u1ee3p hai \u0111i\u1ec7n tr\u1edf m\u1eafc song song: Rss = (R1.R2) \/ (R1+R2) = 50 (\u03a9).<\/li>\n<li>C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n qua b\u1ed9 l\u00e0: Iss = U\/Rss = 100\/50 = 2 (A).<\/li>\n<\/ul>\n<p dir=\"ltr\">b) Khi hai \u0111i\u1ec7n tr\u1edf m\u1eafc n\u1ed1i ti\u1ebfp, nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra l\u00e0:<\/p>\n<p dir=\"ltr\">Q = I^2.Rnt.t = 0,52.200.30.60 = 90000 (J)<\/p>\n<p dir=\"ltr\">Khi hai \u0111i\u1ec7n tr\u1edf m\u1eafc song song, nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra l\u00e0:<\/p>\n<p dir=\"ltr\">Q = I^2.Rss.t = 22.50.30.60 = 360000 (J)<\/p>\n<p dir=\"ltr\">T\u1eeb c\u00e1c ph\u00e9p to\u00e1n tr\u00ean, ta th\u1ea5y \u0111\u01b0\u1ee3c khi m\u1eafc \u0111i\u1ec7n tr\u1edf song song th\u00ec nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra l\u1edbn g\u1ea5p 4 l\u1ea7n so v\u1edbi khi m\u1eafc \u0111i\u1ec7n tr\u1edf n\u1ed1i ti\u1ebfp.<\/p>\n<p dir=\"ltr\">B\u00e0i 5: M\u1ed9t \u0111\u01b0\u1eddng d\u00e2y n\u1ed1i t\u1eeb m\u1ea1ng \u0111i\u1ec7n th\u00e0nh ph\u1ed1 t\u1edbi m\u1ea1ng \u0111i\u1ec7n m\u1ed9t gia \u0111\u00ecnh l\u00e0 d\u00e2y d\u1eabn b\u1eb1ng \u0111\u1ed3ng c\u00f3 t\u1ed5ng chi\u1ec1u d\u00e0i 60m c\u00f3 ti\u1ebft di\u1ec7n 0,6mm2, c\u00f3 \u0111i\u1ec7n tr\u1edf su\u1ea5t 1,7.10-8\u03a9.m. Bi\u1ebft t\u1ed5ng c\u00f4ng su\u1ea5t s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n c\u1ee7a gia \u0111\u00ecnh \u0111\u00f3 l\u00e0 176W. Th\u1eddi gian s\u1eed d\u1ee5ng \u0111i\u1ec7n m\u1ed7i ng\u00e0y trung b\u00ecnh kho\u1ea3ng 4 gi\u1edd. T\u00ednh:<\/p>\n<p dir=\"ltr\">a) \u0110i\u1ec7n tr\u1edf to\u00e0n b\u1ed9 \u0111\u01b0\u1eddng d\u00e2y n\u1ed1i t\u1eeb m\u1ea1ng chung t\u1edbi gia \u0111\u00ecnh \u0111\u00f3.<\/p>\n<p dir=\"ltr\">b) C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y trong d\u00e2y khi s\u1eed d\u1ee5ng c\u00f4ng su\u1ea5t \u0111\u00e3 cho tr\u00ean.<\/p>\n<p dir=\"ltr\">c) Nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra tr\u00ean d\u00e2y n\u00e0y trong 10 ng\u00e0y.<\/p>\n<p dir=\"ltr\">B\u00e0i gi\u1ea3i:\u00a0<\/p>\n<p dir=\"ltr\">a) \u0110i\u1ec7n tr\u1edf c\u1ee7a to\u00e0n b\u1ed9 \u0111\u01b0\u1eddng d\u00e2y n\u1ed1i t\u1eeb m\u1ea1ng chung t\u1edbi gia \u0111\u00ecnh \u0111\u00f3 l\u00e0:<\/p>\n<p dir=\"ltr\">R = \u03c1.l\/S = (1,7.10-8.60)\/(0,6.10-6) = 1,7 (\u03a9).<\/p>\n<p dir=\"ltr\">b) C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua d\u00e2y khi s\u1eed d\u1ee5ng c\u00f4ng su\u1ea5t d\u1eabn cho tr\u00ean l\u00e0:<\/p>\n<p dir=\"ltr\">I = P\/U=176\/200 = 0,8 (A)<\/p>\n<p dir=\"ltr\">c) Nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra tr\u00ean d\u00e2y n\u00e0y trong 10 ng\u00e0y l\u00e0:<\/p>\n<p dir=\"ltr\">Q =I^2.R.t = 1,7.0,82.10.4.3600 = 156672 (J)<\/p>\n<p dir=\"ltr\">B\u00e0i 6: Cho chi\u1ec1u d\u00e0i c\u1ee7a m\u1ed9t d\u00e2y xo\u1eafn trong b\u1ebfp \u0111i\u1ec7n l\u00e0 7m v\u00e0 ti\u1ebft di\u1ec7n l\u00e0 0,01mm2. Bi\u1ebft r\u1eb1ng 1,1.10-6 \u03a9.m l\u00e0 \u0111i\u1ec7u tr\u1edf su\u1ea5t, h\u1ecfi:<\/p>\n<p dir=\"ltr\">a) \u0110\u1ed9 l\u1edbn c\u1ee7a \u0111i\u1ec7n tr\u1edf trong d\u00e2y xo\u1eafn l\u00e0 bao nhi\u00eau?<\/p>\n<p dir=\"ltr\">b) Trong tr\u01b0\u1eddng h\u1ee3p m\u1eafc b\u1ebfp v\u00e0o m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf c\u00f3 \u0111\u1ed9 l\u1edbn l\u00e0 220V th\u00ec trong kho\u1ea3ng th\u1eddi gian l\u00e0 25 ph\u00fat th\u00ec b\u1ebfp t\u1ecfa ra m\u1ed9t l\u01b0\u1ee3ng nhi\u1ec7t l\u00e0 bao nhi\u00eau?<\/p>\n<p dir=\"ltr\">c) Gi\u1ea3 s\u1eed s\u1ef1 hao ph\u00ed nhi\u1ec7t \u0111\u01b0\u1ee3c b\u1ecf qua th\u00ec trong kho\u1ea3ng th\u1eddi gian l\u00e0 25 ph\u00fat th\u00ec b\u1ebfp c\u00f3 th\u1ec3 l\u00e0m cho bao nhi\u00eau l\u01b0\u1ee3ng n\u01b0\u1edbc t\u1eeb tr\u1ea1ng th\u00e1i 250C \u0111\u1ea1t \u0111\u01b0\u1ee3c tr\u1ea1ng th\u00e1i s\u00f4i (1000C)? (Bi\u1ebft r\u1eb1ng n\u01b0\u1edbc c\u00f3 nhi\u1ec7t dung ri\u00eang l\u00e0 4200J\/kgK).<\/p>\n<p dir=\"ltr\">B\u00e0i gi\u1ea3i:<\/p>\n<p dir=\"ltr\">a) \u0110i\u1ec7n tr\u1edf ch\u1ea1y trong d\u00e2y d\u1eabn c\u00f3 \u0111\u1ed9 l\u1edbn l\u00e0:<\/p>\n<p dir=\"ltr\">R = \u03c1.l\/S = (1,1.10-6.7) \/ (0,1.10-6) = 77 (\u03a9).<\/p>\n<p dir=\"ltr\">b) Trong tr\u01b0\u1eddng h\u1ee3p m\u1eafc b\u1ebfp v\u00e0o m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf c\u00f3 \u0111\u1ed9 l\u1edbn l\u00e0 220V th\u00ec d\u00e2y xo\u1eafn c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua v\u1edbi m\u1ed9t c\u01b0\u1eddng \u0111\u1ed9 l\u00e0:<\/p>\n<p dir=\"ltr\">I = U\/R = 220\/77 = 2,86 (A)<\/p>\n<p dir=\"ltr\">Trong kho\u1ea3ng th\u1eddi gian l\u00e0 25 ph\u00fat th\u00ec d\u00e2y xo\u1eafn t\u1ecfa ra m\u1ed9t l\u01b0\u1ee3ng nhi\u1ec7t l\u01b0\u1ee3ng l\u00e0:\u00a0<\/p>\n<p dir=\"ltr\">Qt\u1ecfa = I^2.R.t = 2,862.77.25.60 = 944643,8 (J)<\/p>\n<p dir=\"ltr\">c) \u0110\u1ec3 n\u01b0\u1edbc t\u1eeb tr\u1ea1ng th\u00e1i 250C \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ebfn tr\u1ea1ng th\u00e1i l\u00e0 1000C th\u00ec c\u1ea7n thu v\u00e0o m\u1ed9t l\u01b0\u1ee3ng nhi\u1ec7t l\u01b0\u1ee3ng l\u00e0:<\/p>\n<p dir=\"ltr\">Qthu = m.c.\u0394t<\/p>\n<p dir=\"ltr\">Theo ph\u01b0\u01a1ng tr\u00ecnh c\u00e2n b\u1eb1ng nhi\u1ec7t l\u01b0\u1ee3ng th\u00ec ta c\u00f3 \u0111\u01b0\u1ee3c s\u1ed1 nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra b\u1eb1ng s\u1ed1 nhi\u1ec7t l\u01b0\u1ee3ng thu v\u00e0o<\/p>\n<p dir=\"ltr\">944643,8 = m.c.\u0394t = m.4200.(100 &#8211; 25)\u00a0<\/p>\n<p dir=\"ltr\">m = 3 (kg)<\/p>\n<p dir=\"ltr\">=&gt; L\u01b0\u1ee3ng n\u01b0\u1edbc \u0111\u01b0\u1ee3c l\u00e0m s\u00f4i t\u1eeb nhi\u1ec7t \u0111\u1ed9 250C l\u00e0 3 l\u00edt (v\u00ec kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a n\u01b0\u1edbc l\u00e0 1kg\/ l\u00edt)<\/p>\n<p dir=\"ltr\">B\u00e0i 7: Ng\u01b0\u1eddi ta d\u00f9ng b\u1ebfp \u0111i\u1ec7n \u0111\u1ec3 \u0111un s\u00f4i 2 l\u00edt n\u01b0\u1edbc t\u1eeb nhi\u1ec7t \u0111\u1ed9 t = 2000C. \u0110\u1ec3 \u0111un s\u00f4i l\u01b0\u1ee3ng n\u01b0\u1edbc \u0111\u00f3 trong 20 ph\u00fat th\u00ec ph\u1ea3i d\u00f9ng b\u1ebfp \u0111i\u1ec7n c\u00f3 c\u00f4ng su\u1ea5t bao nhi\u00eau? Bi\u1ebft nhi\u1ec7t dung ri\u00eang c\u1ee7a n\u01b0\u1edbc c = 4,18.103 J\/kg.\u0111\u1ed9, hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ebfp H = 80%.<\/p>\n<p dir=\"ltr\">B\u00e0i gi\u1ea3i:<\/p>\n<p dir=\"ltr\">Nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111un s\u00f4i n\u01b0\u1edbc: Q1 = m.c.(t2 \u2013 t1)<\/p>\n<p dir=\"ltr\">Nhi\u1ec7t l\u01b0\u1ee3ng c\u00f3 \u00edch do b\u1ebfp cung c\u1ea5p trong th\u1eddi gian t: Q2 = H.P.t<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3 P l\u00e0 c\u00f4ng su\u1ea5t c\u1ee7a b\u1ebfp, H l\u00e0 hi\u1ec7u su\u1ea5t<\/p>\n<p dir=\"ltr\">Ta c\u00f3 ph\u01b0\u01a1ng tr\u00ecnh c\u00e2n b\u1eb1ng nhi\u1ec7t: Q1 = Q2<\/p>\n<p dir=\"ltr\">\u21d2 m.c.(t2 \u2013 t1) = H.P.t<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bai-tap-dinh-luat-jun-lenxo-1.JPG\" alt=\"\" width=\"368\" height=\"66\"><\/p>\n<p dir=\"ltr\">V\u1eady ph\u1ea3i d\u00f9ng b\u1ebfp \u0111i\u1ec7n c\u00f3 c\u00f4ng su\u1ea5t l\u00e0 697W.<\/p>\n<p dir=\"ltr\">L\u1eddi k\u1ebft<\/p>\n<p dir=\"ltr\">Tr\u00ean \u0111\u00e2y l\u00e0 to\u00e0n b\u1ed9 c\u00e1c ki\u1ebfn th\u1ee9c v\u1ec1 \u0110\u1ecbnh lu\u1eadt Jun Len x\u01a1 c\u1ea7n thi\u1ebft cho c\u00e1c em trong qu\u00e1 tr\u00ecnh h\u1ecdc t\u1eadp v\u00e0 t\u00ecm hi\u1ec3u ch\u01b0\u01a1ng tr\u00ecnh V\u1eadt L\u00fd l\u1edbp 9. Hy v\u1ecdng v\u1edbi c\u00e1c th\u00f4ng tin b\u1ed5 \u00edch m\u00e0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef \u0111\u00e3 cung c\u1ea5p, c\u00e1c em c\u00f3 th\u1ec3 t\u1ef1 r\u00e8n luy\u1ec7n v\u00e0 n\u00e2ng cao c\u00e1c k\u1ef9 n\u0103ng gi\u1ea3i to\u00e1n c\u0169ng nh\u01b0 k\u1ef9 n\u0103ng ph\u00e2n t\u00edch c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng li\u00ean quan trong \u0111\u1eddi s\u1ed1ng th\u01b0\u1eddng ng\u00e0y. C\u00e1c em c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u c\u00e1c b\u00e0i h\u1ecdc kh\u00e1c th\u00f4ng qua chuy\u00ean m\u1ee5c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n<\/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>Trong ch\u01b0\u01a1ng tr\u00ecnh V\u1eadt l\u00fd 9 n\u00f3i ri\u00eang v\u00e0 ch\u01b0\u01a1ng tr\u00ecnh v\u1eadt l\u00fd ph\u1ed5 th\u00f4ng, \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ef1c k\u1ef3 quan tr\u1ecdng, y\u00eau c\u1ea7u c\u00e1c b\u1ea1n h\u1ecdc sinh c\u1ea7n n\u1eafm r\u00f5 v\u00e0 hi\u1ec3u s\u00e2u s\u1eafc to\u00e0n b\u1ed9 ki\u1ebfn th\u1ee9c. V\u1eady \u0111\u1ecbnh lu\u1eadt Jun Len x\u01a1 l\u00e0 g\u00ec? \u0110\u00e2u l\u00e0 ph\u00e1t&#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-19623","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/19623","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=19623"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/19623\/revisions"}],"predecessor-version":[{"id":25859,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/19623\/revisions\/25859"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=19623"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=19623"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=19623"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}