{"id":567263,"date":"2026-07-22T09:46:36","date_gmt":"2026-07-22T02:46:36","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=567263"},"modified":"2026-07-22T09:46:36","modified_gmt":"2026-07-22T02:46:36","slug":"tu-thong-la-gi","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/tu-thong-la-gi\/","title":{"rendered":"T\u1eeb th\u00f4ng l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c t\u00ednh t\u1eeb th\u00f4ng v\u00e0 \u0111\u01a1n v\u1ecb \u0111o"},"content":{"rendered":"

T\u1eeb th\u00f4ng l\u00e0 g\u00ec? <\/b>\u0110\u00e2y\u00a0l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng v\u1eadt l\u00fd bi\u1ec3u th\u1ecb s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua m\u1ed9t di\u1ec7n t\u00edch \u0111\u1eb7t trong t\u1eeb tr\u01b0\u1eddng, \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c \u03a6 = B\u00b7S\u00b7cos\u03b1. Trong \u0111\u00f3 B l\u00e0 c\u1ea3m \u1ee9ng t\u1eeb, S l\u00e0 di\u1ec7n t\u00edch v\u00e0 \u03b1 l\u00e0 g\u00f3c gi\u1eefa vect\u01a1 ph\u00e1p tuy\u1ebfn c\u1ee7a m\u1eb7t ph\u1eb3ng v\u1edbi vect\u01a1 c\u1ea3m \u1ee9ng t\u1eeb; \u0111\u01a1n v\u1ecb c\u1ee7a t\u1eeb th\u00f4ng l\u00e0 v\u00eabe (Wb). \u0110\u00e2y l\u00e0 ki\u1ebfn th\u1ee9c tr\u1ecdng t\u00e2m c\u1ee7a V\u1eadt l\u00fd 11\u201312. B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y t\u1eeb th\u00f4ng l\u00e0 g\u00ec, c\u00f4ng th\u1ee9c, \u0111\u01a1n v\u1ecb, hi\u1ec7n t\u01b0\u1ee3ng c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb, \u0111\u1ecbnh lu\u1eadt Faraday \u2013 Lenz, \u1ee9ng d\u1ee5ng v\u00e0 b\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i.<\/span><\/p>\n

T\u1eeb th\u00f4ng l\u00e0 g\u00ec?<\/b><\/h2>\n

T\u1eeb th\u00f4ng (k\u00fd hi\u1ec7u \u03a6) qua m\u1ed9t di\u1ec7n t\u00edch S l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng cho s\u1ed1 l\u01b0\u1ee3ng \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua di\u1ec7n t\u00edch \u0111\u00f3. N\u1ebfu h\u00ecnh dung t\u1eeb tr\u01b0\u1eddng l\u00e0 m\u1ed9t ch\u00f9m \u0111\u01b0\u1eddng s\u1ee9c, th\u00ec t\u1eeb th\u00f4ng cho bi\u1ebft c\u00f3 bao nhi\u00eau \u0111\u01b0\u1eddng s\u1ee9c “\u0111\u00e2m xuy\u00ean” qua b\u1ec1 m\u1eb7t \u0111ang x\u00e9t. Di\u1ec7n t\u00edch c\u00e0ng l\u1edbn, t\u1eeb tr\u01b0\u1eddng c\u00e0ng m\u1ea1nh v\u00e0 m\u1eb7t ph\u1eb3ng \u0111\u1eb7t c\u00e0ng vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng s\u1ee9c th\u00ec t\u1eeb th\u00f4ng c\u00e0ng l\u1edbn.<\/span><\/p>\n

\"tu-thong-la-gi-1\"<\/p>\n

C\u00f4ng th\u1ee9c t\u00ednh t\u1eeb th\u00f4ng<\/b><\/h2>\n

X\u00e9t di\u1ec7n t\u00edch ph\u1eb3ng S \u0111\u1eb7t trong t\u1eeb tr\u01b0\u1eddng \u0111\u1ec1u c\u00f3 c\u1ea3m \u1ee9ng t\u1eeb B. T\u1eeb th\u00f4ng qua di\u1ec7n t\u00edch n\u00e0y l\u00e0:<\/span> \u03a6 = B \u00b7 S \u00b7 cos\u03b1. <\/b>Trong \u0111\u00f3:<\/span><\/p>\n

    \n
  • \u03a6: t\u1eeb th\u00f4ng (v\u00eabe, Wb).<\/span><\/li>\n
  • B: \u0111\u1ed9 l\u1edbn c\u1ea3m \u1ee9ng t\u1eeb (tesla, T).<\/span><\/li>\n
  • S: di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t (m\u00b2).<\/span><\/li>\n
  • \u03b1: g\u00f3c gi\u1eefa vect\u01a1 ph\u00e1p tuy\u1ebfn n c\u1ee7a m\u1eb7t S v\u00e0 vect\u01a1 c\u1ea3m \u1ee9ng t\u1eeb B.<\/span><\/li>\n<\/ul>\n

    Khi \u03b1 = 0\u00b0 (m\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng s\u1ee9c), cos\u03b1 = 1 n\u00ean t\u1eeb th\u00f4ng c\u1ef1c \u0111\u1ea1i \u03a6 = B\u00b7S. Khi \u03b1 = 90\u00b0 (m\u1eb7t ph\u1eb3ng song song v\u1edbi \u0111\u01b0\u1eddng s\u1ee9c), cos\u03b1 = 0 n\u00ean t\u1eeb th\u00f4ng b\u1eb1ng 0. N\u1ebfu khung d\u00e2y c\u00f3 N v\u00f2ng th\u00ec t\u1eeb th\u00f4ng qua khung l\u00e0 \u03a6 = N\u00b7B\u00b7S\u00b7cos\u03b1.<\/span><\/p>\n

    \u0110\u01a1n v\u1ecb c\u1ee7a t\u1eeb th\u00f4ng l\u00e0 g\u00ec?<\/b><\/h2>\n

    Trong h\u1ec7 \u0111\u01a1n v\u1ecb SI, \u0111\u01a1n v\u1ecb \u0111o c\u1ee7a t\u1eeb th\u00f4ng l\u00e0 v\u00eabe, c\u00f3 k\u00fd hi\u1ec7u l\u00e0 Wb. D\u1ef1a v\u00e0o bi\u1ec3u th\u1ee9c x\u00e1c \u0111\u1ecbnh t\u1eeb th\u00f4ng, ta c\u00f3: <\/span>1 Wb = 1 T \u00b7 1 m\u00b2<\/b><\/p>\n

    \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 t\u1eeb th\u00f4ng c\u00f3 \u0111\u1ed9 l\u1edbn 1 v\u00eabe khi m\u1ed9t t\u1eeb tr\u01b0\u1eddng c\u00f3 c\u1ea3m \u1ee9ng t\u1eeb 1 tesla xuy\u00ean vu\u00f4ng g\u00f3c qua m\u1ed9t di\u1ec7n t\u00edch 1 m\u00e9t vu\u00f4ng.<\/span><\/p>\n

    \"tu-thong-la-gi-2\"<\/p>\n

    T\u1eeb th\u00f4ng v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb<\/b><\/h2>\n

    T\u1eeb th\u00f4ng l\u00e0 g\u00ec? <\/b>T\u1eeb th\u00f4ng l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng gi\u1eef vai tr\u00f2 quan tr\u1ecdng trong hi\u1ec7n t\u01b0\u1ee3ng c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb. Khi t\u1eeb th\u00f4ng qua m\u1ed9t m\u1ea1ch k\u00edn thay \u0111\u1ed5i theo th\u1eddi gian, trong m\u1ea1ch s\u1ebd xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng.<\/span><\/p>\n

    C\u00f3 ba ph\u01b0\u01a1ng ph\u00e1p c\u01a1 b\u1ea3n \u0111\u1ec3 l\u00e0m bi\u1ebfn thi\u00ean t\u1eeb th\u00f4ng qua m\u1ea1ch:<\/span><\/p>\n

      \n
    • Thay \u0111\u1ed5i \u0111\u1ed9 l\u1edbn c\u1ee7a c\u1ea3m \u1ee9ng t\u1eeb B.<\/span><\/li>\n
    • Thay \u0111\u1ed5i di\u1ec7n t\u00edch S c\u1ee7a m\u1ea1ch.<\/span><\/li>\n
    • Thay \u0111\u1ed5i g\u00f3c \u03b1 gi\u1eefa vect\u01a1 c\u1ea3m \u1ee9ng t\u1eeb v\u00e0 ph\u00e1p tuy\u1ebfn c\u1ee7a m\u1eb7t ph\u1eb3ng m\u1ea1ch (t\u1ee9c l\u00e0 quay m\u1ea1ch trong t\u1eeb tr\u01b0\u1eddng).<\/span><\/li>\n<\/ul>\n

      \u0110\u1ecbnh lu\u1eadt Faraday v\u00e0 \u0111\u1ecbnh lu\u1eadt Lenz<\/b><\/h2>\n

      \u00a0<\/b>\u0110\u1ecbnh lu\u1eadt Faraday v\u00e0 \u0111\u1ecbnh lu\u1eadt Lenz l\u00e0 nh\u1eefng n\u1ed9i dung quan tr\u1ecdng trong l\u0129nh v\u1ef1c \u0111i\u1ec7n t\u1eeb h\u1ecdc, gi\u00fap ng\u01b0\u1eddi h\u1ecdc t\u00ecm hi\u1ec3u v\u1ec1 m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa t\u1eeb tr\u01b0\u1eddng v\u00e0 c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng \u0111i\u1ec7n. Ph\u1ea7n n\u00e0y cung c\u1ea5p ki\u1ebfn th\u1ee9c t\u1ed5ng quan v\u1ec1 c\u00e1c nguy\u00ean l\u00fd c\u01a1 b\u1ea3n, s\u1ef1 h\u00ecnh th\u00e0nh v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb, g\u00f3p ph\u1ea7n x\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng \u0111\u1ec3 ti\u1ebfp c\u1eadn c\u00e1c \u1ee9ng d\u1ee5ng li\u00ean quan trong khoa h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt.<\/span><\/p>\n

        \n
      • \u0110\u1ecbnh lu\u1eadt Faraday: \u0111\u1ed9 l\u1edbn su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng c\u1ea3m \u1ee9ng trong m\u1ea1ch t\u1ec9 l\u1ec7 v\u1edbi t\u1ed1c \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a t\u1eeb th\u00f4ng, bi\u1ec3u di\u1ec5n b\u1eb1ng ec = |\u0394\u03a6 \/ \u0394t| (v\u1edbi khung N v\u00f2ng th\u00ec ec = N\u00b7|\u0394\u03a6\/\u0394t|).<\/span><\/li>\n
      • \u0110\u1ecbnh lu\u1eadt Lenz: d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng c\u00f3 chi\u1ec1u sao cho t\u1eeb tr\u01b0\u1eddng do n\u00f3 sinh ra ch\u1ed1ng l\u1ea1i s\u1ef1 bi\u1ebfn thi\u00ean c\u1ee7a t\u1eeb th\u00f4ng ban \u0111\u1ea7u (nguy\u00ean nh\u00e2n sinh ra n\u00f3).<\/span><\/li>\n<\/ul>\n

        \"tu-thong-la-gi-3\"<\/p>\n

        \u1ee8ng d\u1ee5ng c\u1ee7a t\u1eeb th\u00f4ng v\u00e0 c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb<\/b><\/h2>\n

        Nguy\u00ean l\u00fd bi\u1ebfn thi\u00ean t\u1eeb th\u00f4ng l\u00e0 c\u01a1 s\u1edf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a nhi\u1ec1u thi\u1ebft b\u1ecb \u0111i\u1ec7n quan tr\u1ecdng trong \u0111\u1eddi s\u1ed1ng v\u00e0 c\u00f4ng nghi\u1ec7p. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ti\u00eau bi\u1ec3u g\u1ed3m:<\/span><\/p>\n

          \n
        • M\u00e1y ph\u00e1t \u0111i\u1ec7n: Khi khung d\u00e2y quay trong t\u1eeb tr\u01b0\u1eddng, t\u1eeb th\u00f4ng qua khung d\u00e2y thay \u0111\u1ed5i theo th\u1eddi gian, t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng.<\/span><\/li>\n
        • M\u00e1y bi\u1ebfn \u00e1p: D\u1ef1a tr\u00ean s\u1ef1 bi\u1ebfn thi\u00ean c\u1ee7a t\u1eeb th\u00f4ng trong l\u00f5i th\u00e9p \u0111\u1ec3 truy\u1ec1n v\u00e0 bi\u1ebfn \u0111\u1ed5i \u0111i\u1ec7n \u00e1p gi\u1eefa c\u00e1c cu\u1ed9n d\u00e2y.<\/span><\/li>\n
        • \u0110\u1ed9ng c\u01a1 \u0111i\u1ec7n, b\u1ebfp t\u1eeb v\u00e0 micro \u0111i\u1ec7n \u0111\u1ed9ng: Ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean c\u00e1c nguy\u00ean l\u00fd li\u00ean quan \u0111\u1ebfn t\u1eeb tr\u01b0\u1eddng v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb.<\/span><\/li>\n<\/ul>\n

          C\u00f3 th\u1ec3 kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng, c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb v\u00e0 s\u1ef1 bi\u1ebfn thi\u00ean c\u1ee7a t\u1eeb th\u00f4ng l\u00e0 n\u1ec1n t\u1ea3ng quan tr\u1ecdng c\u1ee7a ph\u1ea7n l\u1edbn c\u00e1c thi\u1ebft b\u1ecb v\u00e0 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n hi\u1ec7n \u0111\u1ea1i.<\/span><\/p>\n

          B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng c\u00f3 l\u1eddi gi\u1ea3i v\u1ec1 t\u1eeb th\u00f4ng l\u00e0 g\u00ec<\/b><\/h2>\n

          B\u00e0i 1: Khung d\u00e2y di\u1ec7n t\u00edch S = 0,02 m\u00b2 \u0111\u1eb7t vu\u00f4ng g\u00f3c v\u1edbi t\u1eeb tr\u01b0\u1eddng \u0111\u1ec1u B = 0,5 T. T\u00ednh t\u1eeb th\u00f4ng. L\u1eddi gi\u1ea3i: \u03a6 = B\u00b7S\u00b7cos0\u00b0 = 0,5 \u00d7 0,02 \u00d7 1 = 0,01 Wb.<\/span><\/p>\n

          B\u00e0i 2: V\u1eabn khung d\u00e2y tr\u00ean, m\u1eb7t ph\u1eb3ng nghi\u00eang sao cho \u03b1 = 60\u00b0. T\u00ednh t\u1eeb th\u00f4ng. L\u1eddi gi\u1ea3i: \u03a6 = 0,5 \u00d7 0,02 \u00d7 cos60\u00b0 = 0,5 \u00d7 0,02 \u00d7 0,5 = 0,005 Wb.<\/span><\/p>\n

          B\u00e0i 3: T\u1eeb th\u00f4ng qua m\u1ed9t m\u1ea1ch gi\u1ea3m \u0111\u1ec1u t\u1eeb 0,01 Wb v\u1ec1 0 trong 0,1 gi\u00e2y. T\u00ednh su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng c\u1ea3m \u1ee9ng. L\u1eddi gi\u1ea3i: ec = |\u0394\u03a6\/\u0394t| = 0,01 \/ 0,1 = 0,1 V.<\/span><\/p>\n

          B\u00e0i 4: Khung d\u00e2y 100 v\u00f2ng, di\u1ec7n t\u00edch 0,01 m\u00b2, trong t\u1eeb tr\u01b0\u1eddng B = 0,2 T vu\u00f4ng g\u00f3c. T\u00ednh t\u1eeb th\u00f4ng qua khung. L\u1eddi gi\u1ea3i: \u03a6 = N\u00b7B\u00b7S = 100 \u00d7 0,2 \u00d7 0,01 = 0,2 Wb.<\/span><\/p>\n

          \"tu-thong-la-gi-4\"<\/p>\n

          Ph\u00e2n bi\u1ec7t t\u1eeb th\u00f4ng v\u00e0 c\u1ea3m \u1ee9ng t\u1eeb<\/b><\/h2>\n

          Hai \u0111\u1ea1i l\u01b0\u1ee3ng t\u1eeb th\u00f4ng \u03a6 v\u00e0 c\u1ea3m \u1ee9ng t\u1eeb B th\u01b0\u1eddng d\u1ec5 b\u1ecb nh\u1ea7m l\u1eabn, nh\u01b0ng ch\u00fang c\u00f3 \u00fd ngh\u0129a v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m kh\u00e1c nhau.<\/span><\/p>\n

            \n
          • C\u1ea3m \u1ee9ng t\u1eeb B: L\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng cho \u0111\u1ed9 m\u1ea1nh, y\u1ebfu v\u00e0 h\u01b0\u1edbng c\u1ee7a t\u1eeb tr\u01b0\u1eddng t\u1ea1i m\u1ed9t \u0111i\u1ec3m trong kh\u00f4ng gian. C\u1ea3m \u1ee9ng t\u1eeb l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng vect\u01a1, c\u00f3 \u0111\u01a1n v\u1ecb \u0111o trong h\u1ec7 SI l\u00e0 tesla (T).<\/span><\/li>\n
          • T\u1eeb th\u00f4ng \u03a6: L\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng bi\u1ec3u th\u1ecb s\u1ed1 l\u01b0\u1ee3ng \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua m\u1ed9t b\u1ec1 m\u1eb7t nh\u1ea5t \u0111\u1ecbnh. T\u1eeb th\u00f4ng l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng v\u00f4 h\u01b0\u1edbng, c\u00f3 \u0111\u01a1n v\u1ecb \u0111o trong h\u1ec7 SI l\u00e0 v\u00eabe (Wb).<\/span><\/li>\n<\/ul>\n

            C\u00f3 th\u1ec3 hi\u1ec3u m\u1ed9t c\u00e1ch ng\u1eafn g\u1ecdn: C\u1ea3m \u1ee9ng t\u1eeb B m\u00f4 t\u1ea3 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a t\u1eeb tr\u01b0\u1eddng t\u1ea1i m\u1ed9t \u0111i\u1ec3m, c\u00f2n t\u1eeb th\u00f4ng \u03a6 m\u00f4 t\u1ea3 t\u1ed5ng l\u01b0\u1ee3ng t\u1eeb tr\u01b0\u1eddng xuy\u00ean qua m\u1ed9t di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t.<\/span><\/p>\n

            C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 t\u1eeb th\u00f4ng<\/b><\/h2>\n

            T\u1eeb th\u00f4ng l\u00e0 g\u00ec?<\/b><\/h3>\n

            L\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng bi\u1ec3u th\u1ecb s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua m\u1ed9t di\u1ec7n t\u00edch \u0111\u1eb7t trong t\u1eeb tr\u01b0\u1eddng.<\/span><\/p>\n

            C\u00f4ng th\u1ee9c t\u00ednh t\u1eeb th\u00f4ng l\u00e0 g\u00ec?<\/b><\/h3>\n

            \u03a6 = B\u00b7S\u00b7cos\u03b1, v\u1edbi B l\u00e0 c\u1ea3m \u1ee9ng t\u1eeb, S l\u00e0 di\u1ec7n t\u00edch, \u03b1 l\u00e0 g\u00f3c gi\u1eefa ph\u00e1p tuy\u1ebfn v\u00e0 c\u1ea3m \u1ee9ng t\u1eeb.<\/span><\/p>\n

            \u0110\u01a1n v\u1ecb c\u1ee7a t\u1eeb th\u00f4ng l\u00e0 g\u00ec?<\/b><\/h3>\n

            L\u00e0 v\u00eabe (Wb); 1 Wb = 1 T\u00b7m\u00b2.<\/span><\/p>\n

            Khi n\u00e0o t\u1eeb th\u00f4ng \u0111\u1ea1t c\u1ef1c \u0111\u1ea1i?<\/b><\/h3>\n

            Khi \u03b1 = 0\u00b0 (m\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb), khi \u0111\u00f3 \u03a6 = B\u00b7S.<\/span><\/p>\n

            \u0110\u1ecbnh lu\u1eadt Faraday ph\u00e1t bi\u1ec3u th\u1ebf n\u00e0o?<\/b><\/h3>\n

            Su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng c\u1ea3m \u1ee9ng t\u1ec9 l\u1ec7 v\u1edbi t\u1ed1c \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a t\u1eeb th\u00f4ng: ec = |\u0394\u03a6\/\u0394t|.<\/span><\/p>\n

            \u0110\u1ecbnh lu\u1eadt Lenz n\u00f3i g\u00ec?<\/b><\/h3>\n

            D\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng c\u00f3 chi\u1ec1u ch\u1ed1ng l\u1ea1i s\u1ef1 bi\u1ebfn thi\u00ean c\u1ee7a t\u1eeb th\u00f4ng sinh ra n\u00f3.<\/span><\/p>\n

            K\u1ebft lu\u1eadn<\/b><\/h2>\n

            T\u1eeb th\u00f4ng l\u00e0 g\u00ec? <\/b>T\u00f3m l\u1ea1i, <\/span>t\u1eeb th\u00f4ng<\/b> bi\u1ec3u th\u1ecb s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb qua m\u1ed9t di\u1ec7n t\u00edch, t\u00ednh b\u1eb1ng \u03a6 = B\u00b7S\u00b7cos\u03b1, \u0111o b\u1eb1ng v\u00eabe (Wb) v\u00e0 l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb. N\u1eafm v\u1eefng t\u1eeb th\u00f4ng c\u00f9ng \u0111\u1ecbnh lu\u1eadt Faraday \u2013 Lenz gi\u00fap b\u1ea1n hi\u1ec3u nguy\u00ean l\u00fd m\u00e1y ph\u00e1t \u0111i\u1ec7n, m\u00e1y bi\u1ebfn \u00e1p. \u0110\u1ec3 h\u1ecdc th\u00eam V\u1eadt l\u00fd, m\u1eddi b\u1ea1n tham kh\u1ea3o c\u00e1c b\u00e0i<\/span> c\u00f4ng th\u1ee9c t\u00ednh qu\u00e3ng \u0111\u01b0\u1eddng<\/span><\/a>,<\/span> m\u1ed9t n\u0103m \u00e1nh s\u00e1ng b\u1eb1ng bao nhi\u00eau km<\/span><\/a> v\u00e0<\/span> di\u1ec7n t\u00edch c\u00e1c t\u1ec9nh Vi\u1ec7t Nam<\/span><\/a> tr\u00ean chuy\u00ean m\u1ee5c tin t\u1ee9c c\u1ee7a Ho\u00e0ng H\u00e0 Mobile.\u00a0<\/span><\/p>\n

            Xem th\u00eam:<\/b><\/p>\n

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              Bi\u1ec3u \u0111\u1ed3 Pareto l\u00e0 g\u00ec? Ph\u00e2n t\u00edch v\u1ec1 \u00fd ngh\u0129a v\u00e0 c\u00e1ch v\u1ebd bi\u1ec3u \u0111\u1ed3 \u0111\u01a1n gi\u1ea3n<\/a><\/p>\n<\/li>\n

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              C\u00e1ch v\u1ebd bi\u1ec3u \u0111\u1ed3 tr\u00f2n trong Excel \u0111\u01a1n gi\u1ea3n, d\u1ec5 hi\u1ec3u<\/a><\/p>\n<\/li>\n<\/ul>\n