Ch\u01b0\u01a1ng 4 - B\u00e0i 25: Truy\u1ec1n th\u00f4ng b\u1eb1ng s\u00f3ng \u0111i\u1ec7n t\u1eeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/chuong-4-bai-25-truyen-thong-bang-song-dien-tu\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 4 - B\u00e0i 25: Truy\u1ec1n th\u00f4ng b\u1eb1ng s\u00f3ng \u0111i\u1ec7n t\u1eeb\" \/>\n<meta property=\"og:description\" content=\"C\u00c2U H\u1eceI C\u00e2u 1 (trang 138 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0T\u1ea1i sao ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 d\u00f9ng m\u1ea1ch dao \u0111\u1ed9ng LC \u0111\u1ec1 ch\u1ecdn s\u00f3ng trong c\u00e1c m\u00e1y thu? 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{"id":25133,"date":"2018-04-03T17:37:51","date_gmt":"2018-04-03T10:37:51","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=25133"},"modified":"2018-04-03T17:38:31","modified_gmt":"2018-04-03T10:38:31","slug":"chuong-4-bai-25-truyen-thong-bang-song-dien-tu","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/chuong-4-bai-25-truyen-thong-bang-song-dien-tu\/","title":{"rendered":"Ch\u01b0\u01a1ng 4 – B\u00e0i 25: Truy\u1ec1n th\u00f4ng b\u1eb1ng s\u00f3ng \u0111i\u1ec7n t\u1eeb"},"content":{"rendered":"

C\u00c2U H\u1eceI<\/strong><\/p>\n

C\u00e2u 1 (trang 138 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0T\u1ea1i sao ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 d\u00f9ng m\u1ea1ch dao \u0111\u1ed9ng LC \u0111\u1ec1 ch\u1ecdn s\u00f3ng trong c\u00e1c m\u00e1y thu?<\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 d\u00f9ng m\u1ea1ch dao \u0111\u1ed9ng LC \u0111\u1ec3 ch\u1ecdn s\u00f3ng trong c\u00e1c m\u00e1y thu v\u00ec khi \u0111\u00f3 c\u00f3 s\u00f3ng \u0111i\u1ec7n t\u1eeb t\u1ea7n s\u1ed1 f_{0<\/sub>\u00a0truy\u1ec1n t\u1edbi, trong khung LC c\u1ee7a m\u00e1y thu s\u1ebd c\u00f3 m\u1ed9t dao \u0111\u1ed9ng \u0111i\u1ec7n t\u1eeb c\u01b0\u1ee1ng b\u1ee9c. Ng\u01b0\u1eddi ta \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n dung t\u1ee5 ho\u1eb7c \u0111\u1ed9 t\u1ef1 c\u1ea3m c\u1ee7a cu\u1ed9n d\u00e2y, \u0111\u1ebfn khi m\u1ea1ch c\u00f3 t\u1ea7n s\u1ed1 ri\u00eang f = f_{0<\/sub>, trong khung s\u1ebd xu\u1ea5t hi\u1ec7n t\u01b0\u1ee3ng c\u00f4ng h\u01b0\u1edfng, l\u00fac \u0111\u00f3 ta thu \u0111\u01b0\u1ee3c s\u00f3ng \u0111i\u1ec7n t\u1eeb n\u00f3i tr\u00ean.<\/p>\n}}

C\u00e2u 2 (trang 138 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0N\u1ebfu m\u1ea1ch dao \u0111\u1ed9ng h\u1edf kh\u00f4ng c\u00f3 \u0111i\u1ec7n tr\u1edf thu\u1ea7n th\u00ec dao \u0111\u1ed9ng \u0111i\u1ec7n t\u1eeb t\u1ef1 do trong \u0111\u00f3 c\u00f3 b\u1ecb t\u1eaft d\u1ea7n kh\u00f4ng? T\u1ea1i sao?<\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

N\u1ebfu m\u1ea1ch dao \u0111\u1ed9ng h\u1edf kh\u00f4ng c\u00f3 \u0111i\u1ec7n tr\u1edf thu\u1ea7n th\u00ec dao \u0111\u1ed9ng \u0111i\u1ec7n t\u1eeb t\u1ef1 do trong \u0111\u00f3 v\u1eabn b\u1ecb t\u1eaft v\u00ec m\u1ea1ch lu\u00f4n b\u1ee9c x\u1ea1 n\u0103ng l\u01b0\u1ee3ng d\u01b0\u1edbi d\u1ea1ng s\u00f3ng \u0111i\u1ec7n t\u1eeb.<\/p>\n

B\u00c0I T\u1eacP<\/strong><\/p>\n

B\u00e0i 1 (trang 138 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0V\u1edbi m\u1ea1ch dao \u0111\u1ed9ng h\u1edf th\u00ec \u1edf v\u00f9ng kh\u00f4ng gian<\/span><\/p>\n

A. Quanh d\u00e2y d\u1eabn ch\u1ec9 t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean.<\/p>\n

B. Quanh d\u00e2y d\u1eabn ch\u1ec9 c\u00f3 \u0111i\u1ec7n tr\u01b0\u1eddng bi\u1ebfn thi\u00ean.<\/p>\n

C. B\u00ean trong t\u1ee5 \u0111i\u1ec7n kh\u00f4ng c\u00f3 t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean.<\/p>\n

D. Quanh d\u00e2y d\u1eabn c\u00f3 c\u1ea3 t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean v\u00e0 \u0111i\u1ec7n tr\u01b0\u1eddng bi\u1ebfn thi\u00ean.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn D<\/p>\n

B\u00e0i 2 (trang 138 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0M\u1ea1ch ch\u1ecdn s\u00f3ng c\u1ee7a m\u1ed9t m\u00e1y thu c\u00f3 m\u1ed9t cu\u1ed9n c\u1ea3m L = 1Mh v\u00e0 m\u1ed9t t\u1ee5 \u0111i\u1ec7n bi\u1ebfn thi\u00ean t\u1eeb 9,7pF \u0111\u1ebfn 92dF. H\u1ecfi m\u00e1y thu n\u00e0y c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c c\u00e1c s\u00f3ng \u0111i\u1ec7n t\u1eeb c\u00f3 b\u01b0\u1edbc s\u00f3ng n\u00e0o trong kho\u1ea3ng n\u00e0o?<\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Trong qu\u00e1 tr\u00ecnh thay \u0111\u1ed5i \u0111i\u1ec7n dung t\u1eeb C_{min<\/sub>\u00a0\u0111\u1ebfn C_{max<\/sub>\u00a0chu k\u1ef3 dao \u0111\u1ed9ng s\u1ebd thay \u0111\u1ed5i t\u1eeb:<\/p>\n}}

$\"\"$ <\/p>\n

B\u1edfi v\u1eady:<\/p>\n

$\"\"$ <\/p>\n

(c v\u1eadn t\u1ed1c lan truy\u1ec1n c\u1ee7a s\u00f3ng c = 3.10^{8<\/sup>\u00a0m)<\/p>\n}

V\u1eady m\u00e1y thu \u0111\u01b0\u1ee3c s\u00f3ng trong kho\u1ea3ng t\u1eeb 185,5m \u0111\u1ebfn 571m.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U H\u1eceI C\u00e2u 1 (trang 138 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0T\u1ea1i sao ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 d\u00f9ng m\u1ea1ch dao \u0111\u1ed9ng LC \u0111\u1ec1 ch\u1ecdn s\u00f3ng trong c\u00e1c m\u00e1y thu? L\u1eddi gi\u1ea3i: Ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 d\u00f9ng m\u1ea1ch dao \u0111\u1ed9ng LC \u0111\u1ec3 ch\u1ecdn s\u00f3ng trong c\u00e1c m\u00e1y thu v\u00ec khi \u0111\u00f3 c\u00f3 s\u00f3ng \u0111i\u1ec7n t\u1eeb t\u1ea7n […]<\/p>\n","protected":false},"author":3,"featured_media":25134,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1304],"tags":[1434,1433],"yoast_head":"\nCh\u01b0\u01a1ng 4 - B\u00e0i 25: Truy\u1ec1n th\u00f4ng b\u1eb1ng s\u00f3ng \u0111i\u1ec7n t\u1eeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/chuong-4-bai-25-truyen-thong-bang-song-dien-tu\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 4 - B\u00e0i 25: Truy\u1ec1n th\u00f4ng b\u1eb1ng s\u00f3ng \u0111i\u1ec7n t\u1eeb\" \/>\n<meta property=\"og:description\" content=\"C\u00c2U H\u1eceI C\u00e2u 1 (trang 138 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0T\u1ea1i sao ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 d\u00f9ng m\u1ea1ch dao \u0111\u1ed9ng LC \u0111\u1ec1 ch\u1ecdn s\u00f3ng trong c\u00e1c m\u00e1y thu? 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