{"id":3086,"date":"2025-09-27T03:12:37","date_gmt":"2025-09-27T03:12:37","guid":{"rendered":"https:\/\/nbaem.com\/?p=3086"},"modified":"2025-09-27T03:24:24","modified_gmt":"2025-09-27T03:24:24","slug":"where-is-the-magnetic-field-of-a-bar-magnet-strongest","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/where-is-the-magnetic-field-of-a-bar-magnet-strongest\/","title":{"rendered":"T\u1eeb tr\u01b0\u1eddng c\u1ee7a nam ch\u00e2m thanh m\u1ea1nh nh\u1ea5t \u1edf \u0111\u00e2u"},"content":{"rendered":"<h2>T\u1eeb tr\u01b0\u1eddng c\u1ee7a Nam ch\u00e2m th\u1eb3ng<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/09\/Bar_magnet_magnetic_field_visualization_v1ykITM4t.webp\" alt=\"H\u00ecnh \u1ea3nh tr\u1ef1c quan tr\u01b0\u1eddng t\u1eeb c\u1ee7a nam ch\u00e2m th\u1eb3ng \u0111\u1ee9ng\" \/><\/p>\n<p>A <strong>nam ch\u00e2m thanh bar<\/strong> l\u00e0 m\u1ed9t mi\u1ebfng v\u1eadt li\u1ec7u t\u1eeb t\u00ednh h\u00ecnh ch\u1eef nh\u1eadt \u0111\u01a1n gi\u1ea3n, th\u01b0\u1eddng l\u00e0m t\u1eeb s\u1eaft ho\u1eb7c h\u1ee3p kim nh\u01b0 neodymium, v\u1edbi hai \u0111\u1ea7u r\u00f5 r\u00e0ng g\u1ecdi l\u00e0 c\u1ef1c\u2014B\u1eafc v\u00e0 Nam. B\u00ean trong thanh, c\u00e1c v\u00f9ng t\u1eeb nh\u1ecf g\u1ecdi l\u00e0 mi\u1ec1n \u0111\u1ec1u \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo c\u00f9ng m\u1ed9t h\u01b0\u1edbng, t\u1ea1o th\u00e0nh tr\u01b0\u1eddng t\u1eeb t\u1ed5ng th\u1ec3 c\u1ee7a nam ch\u00e2m.<\/p>\n<p>N\u1ebfu h\u00ecnh dung c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb quanh m\u1ed9t nam ch\u00e2m th\u1eb3ng, ch\u00fang ch\u1ea1y t\u1eeb c\u1ef1c B\u1eafc \u0111\u1ebfn c\u1ef1c Nam b\u00ean ngo\u00e0i nam ch\u00e2m, t\u1ea1o th\u00e0nh c\u00e1c v\u00f2ng tr\u00f2n m\u01b0\u1ee3t m\u00e0. C\u00e1c \u0111\u01b0\u1eddng n\u00e0y \u0111\u1eb7c h\u01a1n g\u1ea7n c\u00e1c c\u1ef1c, b\u00e1o hi\u1ec7u n\u01a1i tr\u01b0\u1eddng t\u1eeb m\u1ea1nh nh\u1ea5t. D\u1ecdc theo chi\u1ec1u d\u00e0i c\u1ee7a nam ch\u00e2m, tr\u01b0\u1eddng kh\u00f4ng \u0111\u1ec1u\u2014m\u1ea1nh nh\u1ea5t \u1edf c\u1ea3 hai \u0111\u1ea7u v\u00e0 y\u1ebfu h\u01a1n \u1edf gi\u1eefa. Ph\u00e2n b\u1ed1 tr\u01b0\u1eddng n\u00e0y gi\u1ea3i th\u00edch t\u1ea1i sao nam ch\u00e2m h\u00fat ho\u1eb7c \u0111\u1ea9y c\u00e1c v\u1eadt th\u1ec3 ch\u1ee7 y\u1ebfu g\u1ea7n c\u00e1c c\u1ef1c c\u1ee7a ch\u00fang h\u01a1n l\u00e0 t\u1eeb trung t\u00e2m.<\/p>\n<p>C\u00e1c s\u01a1 \u0111\u1ed3 tr\u1ef1c quan th\u01b0\u1eddng minh h\u1ecda \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch cho th\u1ea5y c\u00e1c \u0111\u01b0\u1eddng cong b\u1eaft \u0111\u1ea7u t\u1eeb c\u1ef1c B\u1eafc, u\u1ed1n qua kh\u00f4ng gian, r\u1ed3i k\u1ebft n\u1ed1i l\u1ea1i t\u1ea1i c\u1ef1c Nam, nh\u1ea5n m\u1ea1nh s\u1ef1 t\u1eadp trung c\u1ee7a l\u1ef1c t\u1eeb t\u1ea1i c\u00e1c \u0111\u1ea7u. C\u00e1ch b\u1ed1 tr\u00ed n\u00e0y gi\u00fap hi\u1ec3u c\u00e1ch d\u00f2ng t\u1eeb xuy\u00ean qua v\u00e0 ph\u00e2n b\u1ed1 quanh chi\u1ec1u d\u00e0i c\u1ee7a nam ch\u00e2m th\u1eb3ng.<\/p>\n<h2>Hi\u1ec3u bi\u1ebft v\u1ec1 Tr\u01b0\u1eddng T\u1eeb C\u01a1 B\u1ea3n<\/h2>\n<p>Tr\u01b0\u1eddng t\u1eeb l\u00e0 c\u00e1c khu v\u1ef1c l\u1ef1c v\u00f4 h\u00ecnh bao quanh c\u00e1c v\u1eadt li\u1ec7u t\u1eeb. Ch\u00fang th\u1ec3 hi\u1ec7n c\u00e1ch c\u00e1c nam ch\u00e2m t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c v\u1eadt th\u1ec3 kh\u00e1c m\u00e0 kh\u00f4ng ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp. Tr\u01b0\u1eddng t\u1eeb cho th\u1ea5y h\u01b0\u1edbng v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a l\u1ef1c n\u00e0y.<\/p>\n<p>M\u1ed7i nam ch\u00e2m c\u00f3 hai c\u1ef1c: c\u1ef1c B\u1eafc v\u00e0 c\u1ef1c Nam. C\u00e1c c\u1ef1c n\u00e0y l\u00e0 n\u01a1i l\u1ef1c t\u1eeb m\u1ea1nh nh\u1ea5t. C\u00e1c c\u1ef1c tr\u00e1i d\u1ea5u h\u00fat nhau, trong khi c\u00e1c c\u1ef1c c\u00f9ng d\u1ea5u \u0111\u1ea9y nhau.<\/p>\n<p>C\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb l\u00e0 c\u00e1ch h\u1eefu \u00edch \u0111\u1ec3 h\u00ecnh dung l\u1ef1c v\u00f4 h\u00ecnh n\u00e0y. C\u00e1c \u0111\u01b0\u1eddng n\u00e0y ch\u1ea1y t\u1eeb c\u1ef1c B\u1eafc \u0111\u1ebfn c\u1ef1c Nam b\u00ean ngo\u00e0i nam ch\u00e2m v\u00e0 b\u00ean trong nam ch\u00e2m, ch\u00fang u\u1ed1n l\u1ea1i t\u1eeb Nam v\u1ec1 B\u1eafc. C\u00e1c \u0111\u01b0\u1eddng c\u00e0ng g\u1ea7n nhau, tr\u01b0\u1eddng t\u1eeb trong khu v\u1ef1c \u0111\u00f3 c\u00e0ng m\u1ea1nh. V\u00ec v\u1eady, c\u00e1c khu v\u1ef1c n\u01a1i c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c d\u00e0y \u0111\u1eb7c cho th\u1ea5y l\u1ef1c t\u1eeb m\u1ea1nh h\u01a1n.<\/p>\n<h2><\/h2>\n<h2>N\u01a1i n\u00e0o Tr\u01b0\u1eddng T\u1eeb M\u1ea1nh Nh\u1ea5t Tr\u00ean Nam Ch\u00e2m Th\u1eb3ng<\/h2>\n<p>Tr\u01b0\u1eddng t\u1eeb c\u1ee7a nam ch\u00e2m th\u1eb3ng m\u1ea1nh nh\u1ea5t t\u1ea1i c\u00e1c c\u1ef1c c\u1ee7a n\u00f3, l\u00e0 c\u00e1c \u0111\u1ea7u B\u1eafc v\u00e0 Nam. \u0110i\u1ec1u n\u00e0y x\u1ea3y ra v\u00ec c\u00e1c mi\u1ec1n t\u1eeb\u2014c\u00e1c v\u00f9ng nh\u1ecf b\u00ean trong nam ch\u00e2m n\u01a1i c\u00e1c nguy\u00ean t\u1eed s\u1eafp x\u1ebfp theo h\u01b0\u1edbng t\u1eeb\u2014t\u1eadp trung nhi\u1ec1u nh\u1ea5t t\u1ea1i c\u00e1c c\u1ef1c. C\u00e1c mi\u1ec1n n\u00e0y t\u1ea1o ra m\u1eadt \u0111\u1ed9 c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb cao xu\u1ea5t ph\u00e1t t\u1eeb c\u1ef1c B\u1eafc v\u00e0 \u0111i v\u00e0o c\u1ef1c Nam, l\u00e0m t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a tr\u01b0\u1eddng t\u1ea1i \u0111\u00f3.<\/p>\n<p>Ng\u01b0\u1ee3c l\u1ea1i, trung t\u00e2m ho\u1eb7c gi\u1eefa c\u1ee7a nam ch\u00e2m th\u1eb3ng c\u00f3 \u00edt c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111i qua h\u01a1n v\u00e0 c\u00e1c mi\u1ec1n t\u1eeb \u00edt s\u1eafp x\u1ebfp h\u01b0\u1edbng ra ngo\u00e0i h\u01a1n. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn tr\u01b0\u1eddng t\u1eeb y\u1ebfu h\u01a1n r\u00f5 r\u1ec7t \u1edf trung t\u00e2m so v\u1edbi c\u00e1c c\u1ef1c. V\u00ec v\u1eady, khi \u0111o c\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng t\u1eeb c\u1ee7a nam ch\u00e2m th\u1eb3ng, c\u00e1c gi\u00e1 tr\u1ecb cao nh\u1ea5t lu\u00f4n \u0111\u01b0\u1ee3c ghi nh\u1eadn g\u1ea7n c\u00e1c c\u1ef1c B\u1eafc v\u00e0 Nam.<\/p>\n<h2>C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng t\u1eeb<\/h2>\n<p>M\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng t\u1eeb c\u1ee7a nam ch\u00e2m th\u1eb3ng:<\/p>\n<ul>\n<li>\n<h3>Ch\u1ea5t li\u1ec7u nam ch\u00e2m v\u00e0 s\u1ef1 s\u1eafp x\u1ebfp mi\u1ec1n t\u1eeb<\/h3>\n<p>Lo\u1ea1i v\u1eadt li\u1ec7u \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb. Nam ch\u00e2m l\u00e0m t\u1eeb kim lo\u1ea1i \u0111\u1ea5t hi\u1ebfm nh\u01b0 neodymium c\u00f3 tr\u01b0\u1eddng m\u1ea1nh h\u01a1n v\u00ec c\u00e1c mi\u1ec1n t\u1eeb c\u1ee7a ch\u00fang\u2014c\u00e1c v\u00f9ng nh\u1ecf n\u01a1i c\u00e1c nguy\u00ean t\u1eed s\u1eafp x\u1ebfp theo h\u01b0\u1edbng t\u1eeb\u2014\u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp ch\u1eb7t ch\u1ebd h\u01a1n. S\u1ef1 s\u1eafp x\u1ebfp t\u1ed1t h\u01a1n \u0111\u1ed3ng ngh\u0129a v\u1edbi tr\u01b0\u1eddng t\u1eeb m\u1ea1nh h\u01a1n.<\/li>\n<li>\n<h3>K\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a nam ch\u00e2m th\u1eb3ng<\/h3>\n<p>Nam ch\u00e2m l\u1edbn h\u01a1n th\u01b0\u1eddng t\u1ea1o ra tr\u01b0\u1eddng m\u1ea1nh h\u01a1n do th\u1ec3 t\u00edch c\u00e1c mi\u1ec1n t\u1eeb s\u1eafp x\u1ebfp \u0111\u1ed3ng b\u1ed9 l\u1edbn h\u01a1n. H\u00ecnh d\u1ea1ng c\u0169ng quan tr\u1ecdng; m\u1ed9t nam ch\u00e2m d\u00e0i h\u01a1n c\u00f3 ph\u00e2n b\u1ed1 d\u00f2ng t\u1eeb kh\u00e1c v\u1edbi nam ch\u00e2m ng\u1eafn h\u01a1n, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 m\u1ea1nh c\u1ee7a tr\u01b0\u1eddng t\u1ea1i c\u00e1c \u0111i\u1ec3m kh\u00e1c nhau.<\/li>\n<li>\n<h3>Nhi\u1ec7t \u0111\u1ed9 v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng<\/h3>\n<p>Nhi\u1ec7t \u0111\u1ed9 c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb b\u1eb1ng c\u00e1ch l\u00e0m r\u1ed1i lo\u1ea1n s\u1ef1 s\u1eafp x\u1ebfp mi\u1ec1n. Nhi\u1ec7t \u0111\u1ed9 tr\u00ean \u0111i\u1ec3m Curie c\u1ee7a nam ch\u00e2m c\u00f3 th\u1ec3 l\u00e0m y\u1ebfu ho\u1eb7c x\u00f3a b\u1ecf v\u0129nh vi\u1ec5n t\u1eeb t\u00ednh. C\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng nh\u01b0 \u0111\u1ed9 \u1ea9m v\u00e0 kim lo\u1ea1i g\u1ea7n \u0111\u00f3 c\u0169ng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t.<\/li>\n<li>\n<h3>T\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c tr\u01b0\u1eddng t\u1eeb b\u00ean ngo\u00e0i<\/h3>\n<p>Nam ch\u00e2m ngo\u00e0i tr\u1eddi m\u1ea1nh ho\u1eb7c tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb c\u00f3 th\u1ec3 g\u00e2y nhi\u1ec5u lo\u1ea1n tr\u01b0\u1eddng c\u1ee7a nam ch\u00e2m th\u1eb3ng, ho\u1eb7c l\u00e0m y\u1ebfu \u0111i ho\u1eb7c g\u00e2y ra c\u00e1c d\u1ecbch chuy\u1ec3n t\u1ea1m th\u1eddi trong ph\u00e2n b\u1ed1 d\u00f2ng t\u1eeb tr\u01b0\u1eddng.<\/li>\n<\/ul>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y gi\u00fap l\u1ef1a ch\u1ecdn \u0111\u00fang lo\u1ea1i nam ch\u00e2m v\u00e0 \u0111i\u1ec1u ki\u1ec7n ph\u00f9 h\u1ee3p \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng t\u1ed1i \u01b0u, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p ch\u00ednh x\u00e1c ho\u1eb7c ti\u00eau d\u00f9ng.<\/p>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 c\u00e1ch nhi\u1ec7t \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn nam ch\u00e2m, h\u00e3y truy c\u1eadp <a href=\"https:\/\/nbaem.com\/vi\/what-is-the-effect-of-heating-neodymium-magnets\/\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #ff6600;\"><strong>\u1ea2nh h\u01b0\u1edfng c\u1ee7a vi\u1ec7c l\u00e0m n\u00f3ng nam ch\u00e2m Neodymium<\/strong><\/span><\/a><span style=\"color: #ff6600;\"><strong>.<\/strong><\/span><\/p>\n<h2>C\u00e1ch hi\u1ec3u ph\u00e2n b\u1ed1 t\u1eeb tr\u01b0\u1eddng gi\u00fap \u00edch trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf<\/h2>\n<p><img decoding=\"async\" class=\"\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/09\/Magnetic_Field_Distribution_in_Devices_PFQnVtYpr.webp\" alt=\"Ph\u00e2n b\u1ed1 tr\u01b0\u1eddng t\u1eeb trong thi\u1ebft b\u1ecb\" width=\"414\" height=\"414\" \/><\/p>\n<p>Bi\u1ebft \u0111\u01b0\u1ee3c n\u01a1i m\u1ea1nh nh\u1ea5t c\u1ee7a t\u1eeb tr\u01b0\u1eddng tr\u00ean nam ch\u00e2m th\u1eb3ng r\u1ea5t h\u1eefu \u00edch trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. V\u00ed d\u1ee5, \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n d\u1ef1a v\u00e0o c\u00e1c tr\u01b0\u1eddng t\u1eeb m\u1ea1nh, ph\u00e2n b\u1ed1 \u0111\u1ec1u \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh chuy\u1ec3n \u0111\u1ed9ng c\u01a1 h\u1ecdc m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. C\u00e1c c\u1ea3m bi\u1ebfn t\u1eeb c\u1ea7n \u0111\u1ed9 ch\u00ednh x\u00e1c cao \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c thay \u0111\u1ed5i nh\u1ecf, trong khi c\u00e1c b\u1ed9 ph\u00e2n lo\u1ea1i t\u1eeb s\u1eed d\u1ee5ng s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 c\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng \u0111\u1ec3 ph\u00e2n lo\u1ea1i v\u1eadt li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<p>T\u1ed1i \u01b0u h\u00f3a v\u1eadt li\u1ec7u t\u1eeb trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t c\u00f3 ngh\u0129a l\u00e0 \u0111i\u1ec1u ch\u1ec9nh nam ch\u00e2m cho ph\u00f9 h\u1ee3p v\u1edbi ph\u00e2n b\u1ed1 tr\u01b0\u1eddng c\u1ee5 th\u1ec3. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n v\u00e0 tu\u1ed5i th\u1ecd l\u00e2u d\u00e0i. NBAEM \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t \u1edf \u0111\u00e2y b\u1eb1ng c\u00e1ch cung c\u1ea5p c\u00e1c nam ch\u00e2m th\u1eb3ng ch\u1ea5t l\u01b0\u1ee3ng cao v\u1edbi c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t c\u1ea9n th\u1eadn, thi\u1ebft k\u1ebf ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p tr\u00ean to\u00e0n qu\u1ed1c.<\/p>\n<p>B\u1eb1ng c\u00e1ch hi\u1ec3u ph\u00e2n b\u1ed1 tr\u01b0\u1eddng, c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng t\u1ed1i \u0111a nam ch\u00e2m c\u1ee7a m\u00ecnh\u2014d\u00f9 \u0111\u1ec3 l\u00e0m \u0111\u1ed9ng c\u01a1 m\u1ea1nh h\u01a1n, c\u1ea3m bi\u1ebfn th\u00f4ng minh h\u01a1n hay b\u1ed9 ph\u00e2n lo\u1ea1i hi\u1ec7u qu\u1ea3 h\u01a1n\u2014gi\u00fap doanh nghi\u1ec7p n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m v\u00e0 gi\u1ea3m chi ph\u00ed.<\/p>\n<h2>C\u00e1ch \u0111o c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng<\/h2>\n<p>\u0110o c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng c\u1ee7a nam ch\u00e2m th\u1eb3ng gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 hi\u1ec7u su\u1ea5t v\u00e0 ph\u00f9 h\u1ee3p cho c\u00e1c m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng kh\u00e1c nhau. C\u00e1c d\u1ee5ng c\u1ee5 ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 \u0111\u1ed3ng h\u1ed3 \u0111o gauss v\u00e0 magnetometer, cung c\u1ea5p c\u00e1c ph\u00e9p \u0111o ch\u00ednh x\u00e1c b\u1eb1ng c\u00e1c \u0111\u01a1n v\u1ecb nh\u01b0 gauss ho\u1eb7c tesla. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y l\u00e0 ti\u00eau chu\u1ea9n trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p c\u1ea7n \u0111\u1ed9 ch\u00ednh x\u00e1c cao, nh\u01b0 s\u1ea3n xu\u1ea5t ho\u1eb7c nghi\u00ean c\u1ee9u.<\/p>\n<p>N\u1ebfu b\u1ea1n m\u1edbi b\u1eaft \u0111\u1ea7u ho\u1eb7c mu\u1ed1n m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 ki\u1ec3m tra nam ch\u00e2m c\u1ee7a m\u00ecnh, c\u0169ng c\u00f3 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p DIY d\u1ec5 d\u00e0ng. V\u00ed d\u1ee5, b\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng la b\u00e0n \u0111\u1ec3 quan s\u00e1t ph\u1ea3n \u1ee9ng c\u1ee7a kim la b\u00e0n g\u1ea7n c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u1ee7a nam ch\u00e2m, ho\u1eb7c th\u1eed xem m\u1ed9t m\u1ea9u s\u1eaft nh\u1ecf di chuy\u1ec3n nh\u01b0 th\u1ebf n\u00e0o khi \u0111\u1eb7t g\u1ea7n nam ch\u00e2m.<\/p>\n<p>C\u00e1c ph\u00e9p \u0111o ch\u00ednh x\u00e1c l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p d\u1ef1a v\u00e0o \u0111\u1ed9 m\u1ea1nh t\u1eeb \u1ed5n \u0111\u1ecbnh c\u1ee7a nam ch\u00e2m cho \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n, c\u1ea3m bi\u1ebfn ho\u1eb7c b\u1ed9 ph\u00e2n lo\u1ea1i t\u1eeb. S\u1eed d\u1ee5ng c\u00e1c d\u1ee5ng c\u1ee5 chuy\u00ean nghi\u1ec7p gi\u00fap \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a v\u1eadt li\u1ec7u t\u1eeb v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n.<\/p>\n<h2>Nh\u1eefng hi\u1ec3u l\u1ea7m ph\u1ed5 bi\u1ebfn v\u1ec1 nam ch\u00e2m th\u1eb3ng v\u00e0 tr\u01b0\u1eddng c\u1ee7a ch\u00fang<\/h2>\n<p>Nhi\u1ec1u ng\u01b0\u1eddi ngh\u0129 r\u1eb1ng tr\u01b0\u1eddng t\u1eeb c\u1ee7a nam ch\u00e2m th\u1eb3ng c\u00f3 c\u00f9ng c\u01b0\u1eddng \u0111\u1ed9 kh\u1eafp n\u01a1i ho\u1eb7c th\u1eadm ch\u00ed m\u1ea1nh nh\u1ea5t \u1edf trung t\u00e2m. \u0110i\u1ec1u \u0111\u00f3 kh\u00f4ng \u0111\u00fang. Tr\u01b0\u1eddng t\u1eeb th\u1ef1c t\u1ebf y\u1ebfu nh\u1ea5t \u1edf gi\u1eefa nam ch\u00e2m v\u00e0 m\u1ea1nh nh\u1ea5t t\u1ea1i c\u00e1c c\u1ef1c\u2014ph\u00eda B\u1eafc v\u00e0 Nam. \u0110i\u1ec1u n\u00e0y x\u1ea3y ra v\u00ec c\u00e1c mi\u1ec1n t\u1eeb t\u1eadp trung v\u00e0 x\u1ebfp th\u00e0nh h\u00e0ng d\u1ecdc d\u00e0y \u0111\u1eb7c nh\u1ea5t g\u1ea7n c\u00e1c c\u1ef1c, l\u00e0m cho c\u00e1c \u0111\u01b0\u1eddng t\u1eeb tr\u01b0\u1eddng ch\u1eb7t ch\u1ebd h\u01a1n \u1edf \u0111\u00f3.<\/p>\n<p>M\u1ed9t hi\u1ec3u l\u1ea7m kh\u00e1c l\u00e0 v\u1ec1 c\u00e1c v\u00f9ng trung h\u00f2a t\u1eeb. \u0110\u00e2y l\u00e0 c\u00e1c khu v\u1ef1c d\u1ecdc theo nam ch\u00e2m n\u01a1i tr\u01b0\u1eddng t\u1eeb b\u1ecb tri\u1ec7t ti\u00eau ho\u1eb7c r\u1ea5t y\u1ebfu, th\u01b0\u1eddng quanh trung t\u00e2m. \u0110i\u1ec1u n\u00e0y gi\u1ea3i th\u00edch t\u1ea1i sao c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng thay \u0111\u1ed5i t\u00f9y thu\u1ed9c v\u00e0o n\u01a1i b\u1ea1n \u0111o.<\/p>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c s\u1ef1 th\u1eadt n\u00e0y gi\u00fap l\u00e0m r\u00f5 c\u00e1c hi\u1ec3u l\u1ea7m v\u00e0 h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf nam ch\u00e2m, d\u00f9 cho m\u1ee5c \u0111\u00edch khoa h\u1ecdc hay c\u00f4ng vi\u1ec7c h\u00e0ng ng\u00e0y. \u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 c\u00e1ch c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb thay \u0111\u1ed5i trong nam ch\u00e2m, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e1c ki\u1ebfn th\u1ee9c c\u1ee7a NBAEM v\u1ec1 <strong><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/paramagnetic-and-diamagnetic-and-ferromagnetic\/\" target=\"_blank\" rel=\"noopener\">s\u1ef1 ph\u00e2n c\u1ef1c mi\u1ec1n t\u1eeb trong nam ch\u00e2m<\/a>.<\/span><\/strong><\/p>\n<h2>L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u t\u1eeb ch\u1ea5t l\u01b0\u1ee3ng t\u1eeb NBAEM<\/h2>\n<p>Khi n\u00f3i \u0111\u1ebfn vi\u1ec7c c\u00f3 \u0111\u01b0\u1ee3c m\u1ed9t nam ch\u00e2m th\u1eb3ng v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb \u1ed5n \u0111\u1ecbnh, NBAEM n\u1ed5i b\u1eadt. H\u1ecd t\u1eadp trung v\u00e0o vi\u1ec7c s\u1eed d\u1ee5ng nguy\u00ean li\u1ec7u \u0111\u1ea7u v\u00e0o ch\u1ea5t l\u01b0\u1ee3ng cao c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n c\u1ef1c mi\u1ec1n t\u1eeb xu\u1ea5t s\u1eafc, \u0111i\u1ec1u n\u00e0y tr\u1ef1c ti\u1ebfp n\u00e2ng cao c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb c\u1ee7a nam ch\u00e2m. Vi\u1ec7c l\u1ef1a ch\u1ecdn nguy\u00ean li\u1ec7u c\u1ea9n th\u1eadn n\u00e0y \u0111\u1ea3m b\u1ea3o tr\u01b0\u1eddng t\u1eeb m\u1ea1nh \u1edf nh\u1eefng n\u01a1i quan tr\u1ecdng nh\u1ea5t\u2014\u0111\u1eb7c bi\u1ec7t l\u00e0 t\u1ea1i c\u00e1c c\u1ef1c.<\/p>\n<p>NBAEM cung c\u1ea5p nhi\u1ec1u lo\u1ea1i nam ch\u00e2m th\u1eb3ng, bao g\u1ed3m neodymium, ferrite v\u00e0 alnico. M\u1ed7i lo\u1ea1i \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c nhu c\u1ea7u kh\u00e1c nhau, d\u00f9 b\u1ea1n c\u1ea7n c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb t\u1ed1i \u0111a cho thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p hay nam ch\u00e2m \u1ed5n \u0111\u1ecbnh, b\u1ec1n l\u00e2u cho c\u1ea3m bi\u1ebfn. H\u1ecd c\u0169ng \u0111i\u1ec1u ch\u1ec9nh c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb, nh\u01b0 c\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng v\u00e0 k\u00edch th\u01b0\u1edbc, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3, \u0111i\u1ec1u n\u00e0y l\u00e0 l\u1ee3i th\u1ebf l\u1edbn cho kh\u00e1ch h\u00e0ng trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p.<\/p>\n<p>T\u00f3m l\u1ea1i, ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a NBAEM k\u1ebft h\u1ee3p ch\u1ea5t l\u01b0\u1ee3ng v\u1eadt li\u1ec7u v\u01b0\u1ee3t tr\u1ed9i v\u1edbi quy tr\u00ecnh s\u1ea3n xu\u1ea5t ch\u00ednh x\u00e1c. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra c\u00e1c nam ch\u00e2m th\u1eb3ng \u0111\u1ee9ng duy tr\u00ec ph\u00e2n b\u1ed1 t\u1eeb tr\u01b0\u1eddng m\u1ea1nh m\u1ebd v\u00e0 \u1ed5n \u0111\u1ecbnh, l\u00e0m cho ch\u00fang tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u0111\u00e1ng tin c\u1eady cho b\u1ea5t k\u1ef3 ai c\u1ea7n hi\u1ec7u su\u1ea5t t\u1eeb tr\u01b0\u1eddng \u0111\u00e1ng tin c\u1eady.<\/p>","protected":false},"excerpt":{"rendered":"<p>Kh\u00e1m ph\u00e1 n\u01a1i t\u1eeb tr\u01b0\u1eddng c\u1ee7a nam ch\u00e2m th\u1eb3ng m\u1ea1nh nh\u1ea5t t\u1ea1i c\u00e1c c\u1ef1c v\u00e0 kh\u00e1m ph\u00e1 c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3.<\/p>","protected":false},"author":1,"featured_media":3085,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3086","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/09\/where_is_the_magnetic_field_of_a_bar_magnet_strong.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3086","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/comments?post=3086"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3086\/revisions"}],"predecessor-version":[{"id":3087,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3086\/revisions\/3087"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/3085"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=3086"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=3086"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=3086"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}