{"id":1829,"date":"2025-08-07T04:52:20","date_gmt":"2025-08-07T04:52:20","guid":{"rendered":"https:\/\/nbaem.com\/?p=1829"},"modified":"2025-08-07T04:59:08","modified_gmt":"2025-08-07T04:59:08","slug":"where-is-the-strongest-of-a-magnet","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/where-is-the-strongest-of-a-magnet\/","title":{"rendered":"Ph\u1ea7n m\u1ea1nh nh\u1ea5t c\u1ee7a nam ch\u00e2m n\u1eb1m \u1edf \u0111\u00e2u, gi\u1ea3i th\u00edch \u0111\u01a1n gi\u1ea3n"},"content":{"rendered":"<p>B\u1ea1n c\u00f3 \u0111ang t\u1ef1 h\u1ecfi <strong>ph\u1ea7n m\u1ea1nh nh\u1ea5t c\u1ee7a nam ch\u00e2m n\u1eb1m \u1edf \u0111\u00e2u<\/strong> v\u00e0 t\u1ea1i sao \u0111i\u1ec1u \u0111\u00f3 l\u1ea1i quan tr\u1ecdng? D\u00f9 b\u1ea1n l\u00e0 h\u1ecdc sinh, ng\u01b0\u1eddi \u0111am m\u00ea hay ch\u1ec9 \u0111\u01a1n gi\u1ea3n t\u00f2 m\u00f2 v\u1ec1 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a nam ch\u00e2m, vi\u1ec7c hi\u1ec3u <strong>\u0111\u1ed9 m\u1ea1nh c\u1ee7a c\u1ef1c nam ch\u00e2m<\/strong> c\u00f3 th\u1ec3 t\u1ea1o ra s\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn trong vi\u1ec7c t\u1eadn d\u1ee5ng t\u1ed1i \u0111a nam ch\u00e2m c\u1ee7a b\u1ea1n.<\/p>\n<p>Nam ch\u00e2m kh\u00f4ng ch\u1ec9 l\u00e0 nh\u1eefng v\u1eadt th\u1ec3 \u0111\u01a1n gi\u1ea3n d\u00ednh v\u00e0o t\u1ee7 l\u1ea1nh c\u1ee7a b\u1ea1n\u2014ch\u00fang c\u00f3 c\u1ea5u tr\u00fac h\u1ea5p d\u1eabn, trong \u0111\u00f3 nh\u1eefng \u0111i\u1ec3m nh\u1ea5t \u0111\u1ecbnh t\u00edch t\u1ee5 nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng t\u1eeb tr\u01b0\u1eddng h\u01a1n nh\u1eefng \u0111i\u1ec3m kh\u00e1c. Trong b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd kh\u00e1m ph\u00e1 ch\u00ednh x\u00e1c <strong>n\u01a1i l\u1ef1c c\u1ee7a nam ch\u00e2m m\u1ea1nh nh\u1ea5t<\/strong>, l\u00fd do t\u1ea1i sao \u0111i\u1ec1u \u0111\u00f3 x\u1ea3y ra, v\u00e0 nh\u1eefng m\u1eb9o th\u1ef1c t\u1ebf v\u1ec1 c\u00e1ch x\u00e1c \u0111\u1ecbnh v\u00e0 s\u1eed d\u1ee5ng nh\u1eefng khu v\u1ef1c m\u1ea1nh m\u1ebd \u0111\u00f3 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<p>S\u1eb5n s\u00e0ng \u0111\u1ec3 kh\u00e1m ph\u00e1 b\u00ed m\u1eadt \u0111\u1eb1ng sau <strong>v\u1ecb tr\u00ed nam ch\u00e2m m\u1ea1nh nh\u1ea5t<\/strong>? H\u00e3y b\u1eaft \u0111\u1ea7u ngay n\u00e0o!<\/p>\n<h2>Nam ch\u00e2m l\u00e0 g\u00ec<\/h2>\n<p>Nam ch\u00e2m l\u00e0 m\u1ed9t v\u1eadt th\u1ec3 t\u1ea1o ra tr\u01b0\u1eddng t\u1eeb, c\u00f3 kh\u1ea3 n\u0103ng h\u00fat c\u00e1c v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh nh\u01b0 s\u1eaft, nickel v\u00e0 cobalt. L\u1ef1c v\u00f4 h\u00ecnh n\u00e0y c\u00f3 th\u1ec3 k\u00e9o ho\u1eb7c \u0111\u1ea9y c\u00e1c v\u1eadt li\u1ec7u t\u1eeb t\u00ednh kh\u00e1c m\u00e0 kh\u00f4ng c\u1ea7n ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp. Nam ch\u00e2m c\u00f3 nhi\u1ec1u lo\u1ea1i, ch\u1ee7 y\u1ebfu l\u00e0 nam ch\u00e2m v\u0129nh c\u1eedu v\u00e0 nam ch\u00e2m \u0111i\u1ec7n.<\/p>\n<ul>\n<li><strong>Nam ch\u00e2m v\u0129nh c\u1eedu<\/strong> gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1eb7c t\u00ednh t\u1eeb c\u1ee7a ch\u00fang su\u1ed1t th\u1eddi gian. Ch\u00fang \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb c\u00e1c v\u1eadt li\u1ec7u nh\u01b0 neodymium, ferrite ho\u1eb7c alnico, trong \u0111\u00f3 c\u00e1c v\u00f9ng nh\u1ecf g\u1ecdi l\u00e0 mi\u1ec1n t\u1eeb \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh c\u00f9ng h\u01b0\u1edbng.<\/li>\n<li><strong>Nam ch\u00e2m \u0111i\u1ec7n<\/strong> t\u1ea1o ra tr\u01b0\u1eddng t\u1eeb ch\u1ec9 khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n d\u00e2y. Nh\u1eefng lo\u1ea1i n\u00e0y ph\u1ed5 bi\u1ebfn trong c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 \u0111\u1ed9ng c\u01a1 v\u00e0 loa v\u00ec kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a ch\u00fang.<\/li>\n<\/ul>\n<p>B\u00ean trong nam ch\u00e2m, c\u00e1c mi\u1ec1n t\u1eeb ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng nh\u01b0 nh\u1eefng nam ch\u00e2m nh\u1ecf g\u1eafn k\u1ebft v\u1edbi nhau, t\u1ea1o th\u00e0nh m\u1ed9t tr\u01b0\u1eddng t\u1eeb th\u1ed1ng nh\u1ea5t. Tr\u01b0\u1eddng n\u00e0y m\u1edf r\u1ed9ng quanh nam ch\u00e2m v\u00e0 m\u1ea1nh nh\u1ea5t t\u1ea1i c\u00e1c \u0111i\u1ec3m x\u00e1c \u0111\u1ecbnh. Vi\u1ec7c h\u00ecnh dung tr\u01b0\u1eddng t\u1eeb d\u1ec5 d\u00e0ng h\u01a1n khi s\u1eed d\u1ee5ng s\u1eaft v\u1ee5n ho\u1eb7c h\u00ecnh minh h\u1ecda c\u00e1c \u0111\u01b0\u1eddng t\u1eeb tr\u01b0\u1eddng, th\u1ec3 hi\u1ec7n c\u00e1ch l\u1ef1c t\u1eeb ch\u1ea3y t\u1eeb m\u1ed9t \u0111\u1ea7u c\u1ee7a nam ch\u00e2m sang \u0111\u1ea7u kia.<\/p>\n<p>Hi\u1ec3u r\u00f5 nam ch\u00e2m l\u00e0 g\u00ec v\u00e0 c\u00e1ch n\u00f3 ho\u1ea1t \u0111\u1ed9ng s\u1ebd gi\u00fap b\u1ea1n kh\u00e1m ph\u00e1 n\u01a1i l\u1ef1c t\u1eeb c\u1ee7a n\u00f3 m\u1ea1nh nh\u1ea5t v\u00e0 c\u00e1ch x\u00e1c \u0111\u1ecbnh \u0111i\u1ec1u \u0111\u00f3 trong th\u1ef1c t\u1ebf.<\/p>\n<h2>X\u00e1c \u0111\u1ecbnh ph\u1ea7n m\u1ea1nh nh\u1ea5t c\u1ee7a nam ch\u00e2m<\/h2>\n<p>Ph\u1ea7n m\u1ea1nh nh\u1ea5t c\u1ee7a nam ch\u00e2m lu\u00f4n n\u1eb1m \u1edf c\u00e1c c\u1ef1c \u2014 \u0111\u1ea7u B\u1eafc v\u00e0 \u0111\u1ea7u Nam. \u0110\u00e2y l\u00e0 n\u01a1i tr\u01b0\u1eddng t\u1eeb t\u1eadp trung v\u00e0 m\u1ea1nh nh\u1ea5t. N\u1ebfu b\u1ea1n so s\u00e1nh c\u00e1c c\u1ef1c v\u1edbi trung t\u00e2m ho\u1eb7c c\u00e1c khu v\u1ef1c kh\u00e1c c\u1ee7a nam ch\u00e2m, b\u1ea1n s\u1ebd nh\u1eadn th\u1ea5y l\u1ef1c \u1edf nh\u1eefng ph\u1ea7n gi\u1eefa y\u1ebfu h\u01a1n nhi\u1ec1u.<\/p>\n<p>V\u1ec1 m\u1eb7t khoa h\u1ecdc, l\u00fd do \u0111\u1eb1ng sau \u0111i\u1ec1u n\u00e0y xu\u1ea5t ph\u00e1t t\u1eeb c\u00e1ch c\u00e1c mi\u1ec1n t\u1eeb b\u00ean trong nam ch\u00e2m \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp. \u1ede c\u00e1c c\u1ef1c, c\u00e1c mi\u1ec1n n\u00e0y x\u1ebfp th\u1eb3ng h\u00e0ng ho\u00e0n h\u1ea3o v\u00e0 t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng t\u1eeb m\u1ea1nh m\u1ebd, t\u1eadp trung. C\u00e1c \u0111\u01b0\u1eddng t\u1eeb tr\u01b0\u1eddng, m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 ngh\u0129 nh\u01b0 nh\u1eefng \u0111\u01b0\u1eddng v\u00f4 h\u00ecnh th\u1ec3 hi\u1ec7n h\u01b0\u1edbng c\u1ee7a l\u1ef1c t\u1eeb, t\u1ee5 l\u1ea1i d\u00e0y \u0111\u1eb7c t\u1ea1i c\u00e1c c\u1ef1c. S\u1ef1 t\u1eadp trung n\u00e0y khi\u1ebfn c\u00e1c c\u1ef1c tr\u1edf th\u00e0nh \u0111i\u1ec3m c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb m\u1ea1nh nh\u1ea5t.<\/p>\n<p>H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t thanh nam ch\u00e2m nh\u01b0 m\u1ed9t \u1ed1ng d\u1eabn n\u01b0\u1edbc c\u00f3 d\u00f2ng ch\u1ea3y qua. \u1ede c\u00e1c c\u1ef1c, gi\u1ed1ng nh\u01b0 n\u01b0\u1edbc ch\u1ea3y ra qua m\u1ed9t v\u00f2i nh\u1ecf h\u1eb9p\u2014m\u1ea1nh m\u1ebd v\u00e0 t\u1eadp trung. \u1ede trung t\u00e2m, d\u00f2ng ch\u1ea3y ph\u00e2n t\u00e1n v\u00e0 y\u1ebfu \u0111i. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao c\u00e1c c\u1ef1c mang l\u1ea1i l\u1ef1c \u0111\u1ea9y ho\u1eb7c h\u00fat m\u1ea1nh nh\u1ea5t.<\/p>\n<p>Trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 khi b\u1ea1n c\u1ea7n l\u1ef1c t\u1eeb l\u1edbn nh\u1ea5t, \u0111\u1eb7t v\u1eadt th\u1ec3 c\u1ee7a b\u1ea1n g\u1ea7n c\u00e1c c\u1ef1c c\u1ee7a nam ch\u00e2m l\u00e0 \u0111i\u1ec1u then ch\u1ed1t.<\/p>\n<h2>C\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ef1c c\u1ee7a nam ch\u00e2m<\/h2>\n<p>Vi\u1ec7c t\u00ecm c\u00e1c c\u1ef1c c\u1ee7a nam ch\u00e2m kh\u00e1 \u0111\u01a1n gi\u1ea3n v\u00e0 c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n t\u1ea1i nh\u00e0 ho\u1eb7c trong m\u1ed9t ph\u00f2ng th\u00ed nghi\u1ec7m c\u01a1 b\u1ea3n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p DIY d\u1ec5 d\u00e0ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u1ef1c B\u1eafc v\u00e0 c\u1ef1c Nam:<\/p>\n<ul>\n<li>\n<h3>S\u1eed d\u1ee5ng la b\u00e0n<\/h3>\n<p>Kim la b\u00e0n lu\u00f4n ch\u1ec9 v\u1ec1 ph\u00eda B\u1eafc t\u1eeb tr\u01b0\u1eddng c\u1ee7a Tr\u00e1i \u0110\u1ea5t. H\u00e3y \u0111\u01b0a nam ch\u00e2m c\u1ee7a b\u1ea1n g\u1ea7n la b\u00e0n:<\/p>\n<ul>\n<li>C\u1ef1c c\u1ee7a nam ch\u00e2m <strong>B\u1eafc<\/strong> s\u1ebd \u0111\u1ea9y ph\u1ea7n \u0111\u1ea7u B\u1eafc c\u1ee7a kim la b\u00e0n (c\u1ea3 hai \u0111\u1ec1u l\u00e0 c\u00f9ng lo\u1ea1i c\u1ef1c).<\/li>\n<li>C\u1ef1c c\u1ee7a nam ch\u00e2m <strong>C\u1ef1c Nam<\/strong> s\u1ebd h\u00fat ph\u1ea7n \u0111\u1ea7u B\u1eafc c\u1ee7a kim la b\u00e0n.<br \/>\n\u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n \u0111\u00e1nh d\u1ea5u ph\u00eda n\u00e0o c\u1ee7a nam ch\u00e2m l\u00e0 c\u1ef1c B\u1eafc v\u00e0 c\u1ef1c Nam.<\/li>\n<\/ul>\n<\/li>\n<li>\n<h3>Ki\u1ec3m tra b\u1ee5i s\u1eaft<\/h3>\n<p>R\u1ea3i m\u1ed9t \u00edt b\u1ee5i s\u1eaft l\u00ean m\u1ed9t t\u1edd gi\u1ea5y v\u00e0 \u0111\u1eb7t nam ch\u00e2m ph\u00eda d\u01b0\u1edbi. C\u00e1c b\u1ee5i s\u1eaft s\u1ebd x\u1ebfp th\u00e0nh h\u00e0ng d\u1ecdc theo c\u00e1c \u0111\u01b0\u1eddng t\u1eeb tr\u01b0\u1eddng:<\/p>\n<ul>\n<li>C\u00e1c b\u1ee5i s\u1eaft t\u1eadp trung d\u00e0y \u0111\u1eb7c nh\u1ea5t t\u1ea1i c\u00e1c c\u1ef1c c\u1ee7a nam ch\u00e2m (l\u1ef1c t\u1eeb m\u1ea1nh nh\u1ea5t).<br \/>\n\u0110i\u1ec1u n\u00e0y tr\u1ef1c quan cho th\u1ea5y v\u1ecb tr\u00ed c\u00e1c c\u1ef1c tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a nam ch\u00e2m.<\/li>\n<\/ul>\n<\/li>\n<li>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p nam ch\u00e2m kh\u00e1c<\/h3>\n<p>N\u1ebfu b\u1ea1n c\u00f3 m\u1ed9t nam ch\u00e2m v\u1edbi c\u00e1c c\u1ef1c \u0111\u00e3 bi\u1ebft, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u01b0a nam ch\u00e2m ch\u01b0a bi\u1ebft c\u1ee7a m\u00ecnh l\u1ea1i g\u1ea7n:<\/p>\n<ul>\n<li>C\u00e1c c\u1ef1c c\u00f9ng lo\u1ea1i \u0111\u1ea9y nhau.<\/li>\n<li>C\u00e1c c\u1ef1c tr\u00e1i chi\u1ec1u h\u00fat nhau.<br \/>\nPh\u01b0\u01a1ng ph\u00e1p \u0111\u01a1n gi\u1ea3n n\u00e0y cho ph\u00e9p b\u1ea1n g\u00e1n nh\u00e3n c\u00e1c c\u1ef1c B\u1eafc v\u00e0 c\u1ef1c Nam c\u1ee7a nam ch\u00e2m b\u1eb1ng c\u00e1ch quan s\u00e1t s\u1ef1 h\u00fat ho\u1eb7c \u0111\u1ea9y.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 d\u1ec5 d\u00e0ng n\u00e0y c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ef1c v\u00e0 hi\u1ec3u r\u00f5 n\u01a1i l\u1ef1c t\u1eeb m\u1ea1nh nh\u1ea5t. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch n\u1ebfu b\u1ea1n mu\u1ed1n s\u1eed d\u1ee5ng nam ch\u00e2m m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 cho c\u00e1c d\u1ef1 \u00e1n, s\u1eeda ch\u1eefa ho\u1eb7c nhu c\u1ea7u c\u00f4ng nghi\u1ec7p.<\/p>\n<h2>C\u00e1c bi\u1ebfn th\u1ec3 v\u1ec1 c\u01b0\u1eddng \u0111\u1ed9 t\u00f9y thu\u1ed9c v\u00e0o h\u00ecnh d\u1ea1ng v\u00e0 ch\u1ea5t li\u1ec7u c\u1ee7a nam ch\u00e2m<\/h2>\n<p>H\u00ecnh d\u1ea1ng c\u1ee7a nam ch\u00e2m \u0111\u00f3ng vai tr\u00f2 l\u1edbn trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh n\u01a1i c\u00f3 l\u1ef1c t\u1eeb m\u1ea1nh nh\u1ea5t c\u1ee7a n\u00f3. V\u00ed d\u1ee5:<\/p>\n<ul>\n<li><strong>Nam ch\u00e2m thanh<\/strong> c\u00f3 tr\u01b0\u1eddng t\u1eeb m\u1ea1nh nh\u1ea5t ngay t\u1ea1i hai \u0111\u1ea7u, ho\u1eb7c c\u00e1c c\u1ef1c c\u1ee7a ch\u00fang.<\/li>\n<li><strong>Nam ch\u00e2m h\u00ecnh m\u00f3ng ng\u1ef1a<\/strong> b\u1ebb cong tr\u01b0\u1eddng t\u1eeb v\u1ec1 ph\u00eda c\u00e1c \u0111\u1ea7u m\u1edf, l\u00e0m cho c\u00e1c c\u1ef1c \u0111\u00f3 \u0111\u1eb7c bi\u1ec7t m\u1ea1nh v\u00e0 t\u1eadp trung.<\/li>\n<li><strong>Nam ch\u00e2m \u0111\u0129a<\/strong> th\u01b0\u1eddng c\u00f3 tr\u01b0\u1eddng t\u1eeb m\u1ea1nh nh\u1ea5t tr\u00ean c\u00e1c m\u1eb7t ph\u1eb3ng h\u00ecnh tr\u00f2n.<\/li>\n<\/ul>\n<p>Ngo\u00e0i h\u00ecnh d\u1ea1ng, lo\u1ea1i ch\u1ea5t li\u1ec7u t\u1eeb c\u00f2n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch ph\u00e2n b\u1ed1 c\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng:<\/p>\n<ul>\n<li><strong>Nam ch\u00e2m Neodymium<\/strong> r\u1ea5t m\u1ea1nh v\u00e0 t\u1eadp trung l\u1ef1c t\u1eeb c\u1ee7a ch\u00fang t\u1ea1i c\u00e1c c\u1ef1c, khi\u1ebfn ch\u00fang ph\u1ed5 bi\u1ebfn cho c\u00e1c nhu c\u1ea7u c\u01b0\u1eddng \u0111\u1ed9 cao.<\/li>\n<li><strong>Nam ch\u00e2m ferrite<\/strong> r\u1ebb h\u01a1n nh\u01b0ng th\u01b0\u1eddng c\u00f3 tr\u01b0\u1eddng t\u1eeb y\u1ebfu h\u01a1n, l\u1ef1c ph\u00e2n b\u1ed1 \u0111\u1ec1u h\u01a1n.<\/li>\n<li><strong>Nam ch\u00e2m Alnico<\/strong> cung c\u1ea5p c\u01b0\u1eddng \u0111\u1ed9 trung b\u00ecnh v\u00e0 c\u00f3 xu h\u01b0\u1edbng c\u00f3 tr\u01b0\u1eddng t\u1eeb \u1ed5n \u0111\u1ecbnh, r\u1ed9ng.<\/li>\n<\/ul>\n<p>NBAEM l\u00e0 nh\u00e0 cung c\u1ea5p \u0111\u00e1ng tin c\u1eady n\u1ed5i ti\u1ebfng v\u1edbi c\u00e1c v\u1eadt li\u1ec7u t\u1eeb ch\u1ea5t l\u01b0\u1ee3ng cao. H\u1ecd cung c\u1ea5p nhi\u1ec1u lo\u1ea1i s\u1ea3n ph\u1ea9m l\u00e0m t\u1eeb neodymium, ferrite v\u00e0 alnico ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng \u2014 d\u00f9 b\u1ea1n c\u1ea7n s\u1ee9c m\u1ea1nh c\u1ee5c b\u1ed9 cao t\u1ea1i c\u00e1c c\u1ef1c hay ph\u00e2n b\u1ed1 l\u1ef1c t\u1eeb r\u1ed9ng h\u01a1n. \u0110\u1ed1i v\u1edbi kh\u00e1ch h\u00e0ng t\u1ea1i Vi\u1ec7t Nam t\u00ecm ki\u1ebfm nam ch\u00e2m \u0111\u00e1ng tin c\u1eady, chuy\u00ean m\u00f4n c\u1ee7a NBAEM \u0111\u1ea3m b\u1ea3o b\u1ea1n c\u00f3 \u0111\u01b0\u1ee3c c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 h\u00ecnh d\u1ea1ng ph\u00f9 h\u1ee3p cho d\u1ef1 \u00e1n ho\u1eb7c m\u1ee5c \u0111\u00edch c\u00f4ng nghi\u1ec7p c\u1ee7a m\u00ecnh.<\/p>\n<h2>\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf T\u1ea1i sao vi\u1ec7c bi\u1ebft ph\u1ea7n m\u1ea1nh nh\u1ea5t l\u1ea1i quan tr\u1ecdng<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/Strongest_Magnet_Placement_Tips_kdR.webp\" alt=\"M\u1eb9o \u0111\u1eb7t nam ch\u00e2m m\u1ea1nh nh\u1ea5t\" \/><\/p>\n<p>Bi\u1ebft \u0111\u01b0\u1ee3c n\u01a1i ph\u1ea7n m\u1ea1nh nh\u1ea5t c\u1ee7a nam ch\u00e2m, th\u01b0\u1eddng l\u00e0 \u1edf c\u00e1c c\u1ef1c, l\u00e0 ch\u00eca kh\u00f3a trong c\u1ea3 s\u1eed d\u1ee5ng c\u00f4ng nghi\u1ec7p v\u00e0 h\u00e0ng ng\u00e0y. Trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p, nam ch\u00e2m \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 n\u00e2ng c\u00e1c v\u1eadt kim lo\u1ea1i n\u1eb7ng, trong \u0111\u1ed9ng c\u01a1 v\u00e0 c\u1ea3m bi\u1ebfn. \u0110\u1eb7t nam ch\u00e2m sao cho c\u00e1c c\u1ef1c ch\u1ea1m v\u00e0o b\u1ec1 m\u1eb7t gi\u00fap t\u1ed1i \u0111a h\u00f3a l\u1ef1c t\u1eeb, l\u00e0m cho c\u00e1c nhi\u1ec7m v\u1ee5 n\u00e2ng ho\u1eb7c gi\u1eef ch\u1eafc ch\u1eafn h\u01a1n.<\/p>\n<p>Trong gia \u0111\u00ecnh, nam ch\u00e2m xu\u1ea5t hi\u1ec7n trong nam ch\u00e2m t\u1ee7 l\u1ea1nh, m\u00f3c t\u1eeb tr\u00ean t\u00fai x\u00e1ch ho\u1eb7c trang s\u1ee9c, v\u00e0 trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed nh\u01b0 loa v\u00e0 \u1ed5 c\u1ee9ng. S\u1eed d\u1ee5ng \u0111\u00fang c\u00e1c c\u1ef1c gi\u00fap c\u00e1c nam ch\u00e2m n\u00e0y b\u00e1m ch\u1eafc h\u01a1n v\u00e0 ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang ch\u1ee9c n\u0103ng.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 m\u1eb9o nhanh \u0111\u1ec3 t\u1eadn d\u1ee5ng t\u1ed1i \u0111a nam ch\u00e2m c\u1ee7a b\u1ea1n:<\/p>\n<ul>\n<li>Lu\u00f4n \u0111\u1ecbnh v\u1ecb c\u00e1c c\u1ef1c n\u01a1i b\u1ea1n c\u1ea7n l\u1ef1c k\u00e9o ho\u1eb7c gi\u1eef m\u1ea1nh nh\u1ea5t.<\/li>\n<li>\u0110\u1ec3 n\u00e2ng ho\u1eb7c gi\u1eef kim lo\u1ea1i, c\u0103n ch\u1ec9nh nam ch\u00e2m sao cho c\u1ea3 hai c\u1ef1c ti\u1ebfp x\u00fac v\u1edbi b\u1ec1 m\u1eb7t.<\/li>\n<li>Tr\u00e1nh \u0111\u1eb7t nam ch\u00e2m ch\u1ec9 v\u1edbi trung t\u00e2m ti\u1ebfp x\u00fac v\u1edbi v\u1eadt th\u1ec3; l\u1ef1c h\u00fat s\u1ebd y\u1ebfu h\u01a1n.<\/li>\n<li>Trong \u0111\u1ed9ng c\u01a1 ho\u1eb7c c\u1ea3m bi\u1ebfn, vi\u1ec7c \u0111\u1eb7t c\u1ef1c \u0111\u00fang v\u1ecb tr\u00ed gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 tin c\u1eady.<\/li>\n<li>Gi\u1eef cho nam ch\u00e2m s\u1ea1ch s\u1ebd v\u00e0 kh\u00f4ng c\u00f3 b\u1ee5i b\u1ea9n t\u1ea1i c\u00e1c c\u1ef1c \u0111\u1ec3 duy tr\u00ec s\u1ee9c m\u1ea1nh.<\/li>\n<\/ul>\n<p>B\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o v\u1ecb tr\u00ed nam ch\u00e2m m\u1ea1nh nh\u1ea5t \u2014 c\u00e1c c\u1ef1c \u2014 b\u1ea1n s\u1ebd c\u00f3 nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng h\u01a1n v\u00e0 k\u1ebft qu\u1ea3 t\u1ed1t h\u01a1n d\u00f9 l\u00e0 c\u00f4ng vi\u1ec7c n\u1eb7ng hay c\u00f4ng vi\u1ec7c h\u00e0ng ng\u00e0y.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 \u0110\u1ed9 m\u1ea1nh c\u1ee7a Nam ch\u00e2m v\u00e0 C\u00e1c c\u1ef1c<\/h2>\n<h3>T\u1ea1i sao c\u00e1c c\u1ef1c c\u1ee7a nam ch\u00e2m l\u1ea1i l\u00e0 ph\u1ea7n m\u1ea1nh nh\u1ea5t?<\/h3>\n<p>C\u00e1c c\u1ef1c c\u1ee7a nam ch\u00e2m l\u00e0 n\u01a1i c\u00e1c \u0111\u01b0\u1eddng t\u1eeb tr\u01b0\u1eddng t\u1eadp trung nhi\u1ec1u nh\u1ea5t, khi\u1ebfn nh\u1eefng \u0111i\u1ec3m n\u00e0y m\u1ea1nh nh\u1ea5t. C\u00e1c mi\u1ec1n t\u1eeb b\u00ean trong nam ch\u00e2m s\u1eafp x\u1ebfp theo h\u01b0\u1edbng v\u00e0 \u0111\u1ea9y tr\u01b0\u1eddng ra ngo\u00e0i ch\u1ee7 y\u1ebfu t\u1ea1i c\u00e1c c\u1ef1c B\u1eafc v\u00e0 c\u1ef1c Nam, mang l\u1ea1i l\u1ef1c t\u1eeb cao nh\u1ea5t so v\u1edbi c\u00e1c khu v\u1ef1c kh\u00e1c nh\u01b0 trung t\u00e2m.<\/p>\n<h3>Li\u1ec7u \u0111\u1ed9 m\u1ea1nh c\u00f3 th\u1ec3 t\u0103ng t\u1ea1i trung t\u00e2m c\u1ee7a nam ch\u00e2m kh\u00f4ng?<\/h3>\n<p>Th\u00f4ng th\u01b0\u1eddng, kh\u00f4ng. Trung t\u00e2m c\u1ee7a nam ch\u00e2m c\u00f3 \u00edt \u0111\u01b0\u1eddng t\u1eeb h\u01a1n, do \u0111\u00f3 l\u1ef1c t\u1ea1i \u0111\u00f3 y\u1ebfu h\u01a1n. \u0110\u1ec3 n\u00e2ng cao \u0111\u1ed9 m\u1ea1nh t\u1ed5ng th\u1ec3, nh\u00e0 s\u1ea3n xu\u1ea5t t\u1eadp trung c\u1ea3i thi\u1ec7n v\u1eadt li\u1ec7u t\u1eeb v\u00e0 h\u00ecnh d\u1ea1ng thay v\u00ec t\u0103ng l\u1ef1c t\u1ea1i trung t\u00e2m.<\/p>\n<h3>T\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 h\u01b0 h\u1ecfng \u0111\u1ebfn c\u00e1c c\u1ef1c v\u00e0 \u0111\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<p>Nhi\u1ec7t \u0111\u1ed9 cao c\u1ef1c \u0111oan c\u00f3 th\u1ec3 l\u00e0m r\u1ed1i lo\u1ea1n s\u1ef1 s\u1eafp x\u1ebfp c\u1ee7a c\u00e1c mi\u1ec1n t\u1eeb, l\u00e0m gi\u1ea3m \u0111\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m, \u0111\u1eb7c bi\u1ec7t t\u1ea1i c\u00e1c c\u1ef1c. H\u01b0 h\u1ecfng v\u1eadt l\u00fd nh\u01b0 n\u1ee9t ho\u1eb7c u\u1ed1n cong c\u0169ng c\u00f3 th\u1ec3 ph\u00e1 v\u1ee1 c\u1ea5u tr\u00fac mi\u1ec1n, l\u00e0m y\u1ebfu nam ch\u00e2m. T\u1ed1t nh\u1ea5t n\u00ean gi\u1eef nam ch\u00e2m trong m\u00f4i tr\u01b0\u1eddng \u1ed5n \u0111\u1ecbnh \u0111\u1ec3 duy tr\u00ec to\u00e0n b\u1ed9 \u0111\u1ed9 m\u1ea1nh c\u1ee7a ch\u00fang.<\/p>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin chi ti\u1ebft v\u1ec1 v\u1eadt li\u1ec7u v\u00e0 \u0111\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m, h\u00e3y xem <a href=\"https:\/\/nbaem.com\/vi\/what-are-magnets-made-of\/\" target=\"_blank\" rel=\"noopener\">nam ch\u00e2m l\u00e0m b\u1eb1ng g\u00ec<\/a> v\u00e0 <a href=\"https:\/\/nbaem.com\/vi\/how-to-measure-magnet-strength\/\" target=\"_blank\" rel=\"noopener\">c\u00e1ch \u0111o \u0111\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Kh\u00e1m ph\u00e1 n\u01a1i m\u1ea1nh nh\u1ea5t c\u1ee7a m\u1ed9t nam ch\u00e2m n\u1eb1m \u1edf \u0111\u00e2u v\u00e0 t\u00ecm hi\u1ec3u c\u00e1ch c\u00e1c c\u1ef1c t\u1eeb t\u1eadp trung l\u1ef1c \u0111\u1ec3 s\u1eed d\u1ee5ng t\u1ed1i \u01b0u trong c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau.<\/p>","protected":false},"author":1,"featured_media":1828,"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-1829","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/where_is_the_strongest_of_a_magnet_77a.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1829","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=1829"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1829\/revisions"}],"predecessor-version":[{"id":1841,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1829\/revisions\/1841"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1828"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=1829"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=1829"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=1829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}