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{"id":26195,"date":"2018-04-10T16:20:29","date_gmt":"2018-04-10T09:20:29","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=26195"},"modified":"2018-04-10T16:20:29","modified_gmt":"2018-04-10T09:20:29","slug":"bai-tap-trac-nghiem-vat-li-12-mach-co-r-l-c-mac-noi-tiep-phan-2","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-vat-li-12-mach-co-r-l-c-mac-noi-tiep-phan-2\/","title":{"rendered":"B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: M\u1ea1ch c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp (ph\u1ea7n 2)"},"content":{"rendered":"

C\u00e2u 8:<\/b>\u00a0M\u1ed9t \u0111\u1ecda m\u1ea1ch c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp, \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi hai c\u1ef1c c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng kh\u00f4ng \u0111\u1ed5i. Thay \u0111\u1ed5i t\u1ea7n s\u1ed1 g\u00f3c c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n ng\u01b0\u1eddi ta nh\u1eadn th\u1ea5y khi n\u00f3 c\u00f3 gi\u00e1 tr\u1ecb l\u00e0 \u03c91<\/sub>\u00a0ho\u1eb7c \u03c92<\/sub>\u00a0(\u03c91<\/sub>\u2260\u03c92<\/sub>) th\u00ec c\u01b0\u1eddng \u0111\u1ed9 hi\u1ec7u d\u1ee5ng c\u1ee7a d\u00f2ng \u0111i\u1ec7n trong \u0111o\u1ea1n m\u1ea1ch b\u1eb1ng nhau. T\u1ea7n s\u1ed1 g\u00f3c c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng trong m\u1ea1ch l\u00e0<\/p>\n

\"\"<\/p>\n

C\u00e2u 9:<\/b>\u00a0\u0110o\u1ea1n m\u1ea1ch c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp \u0111\u01b0\u1ee3c m\u1eafc v\u00e0o m\u1ea1ng \u0111i\u1ec7n c\u00f3 t\u1ea7n s\u1ed1 f1<\/sub>\u00a0th\u00ec \u0111o\u1ea1n m\u1ea1ch c\u00f3 c\u1ea3m kh\u00e1ng l\u00e0 36 \u03a9 v\u00e0 dung kh\u00e1ng l\u00e0 144 \u03a9. N\u1ebfu m\u1ea1ng \u0111i\u1ec7n c\u00f3 t\u1ea7n s\u1ed1 f2<\/sub>=120 Hz th\u00ec c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch c\u00f9ng pha v\u1edbi \u0111i\u1ec7n \u00e1p gi\u1eefa hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch. Gi\u00e1 tr\u1ecb c\u1ee7a t\u1ea7n s\u1ed1 f1<\/sub>\u00a0l\u00e0<\/p>\n

A. 85 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B. 100 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C. 60 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0D. 50 Hz<\/p>\n

C\u00e2u 10:<\/b><\/p>\n

\"\"<\/p>\n

C\u00e2u 11:<\/b>\u00a0Cho m\u1ea1ch \u0111i\u1ec7n c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp. Bi\u1ebft R = 40 \u03a9, ZL<\/sub>=ZC<\/sub>=40 \u03a9. \u0110i\u1ec7n \u00e1p \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch c\u00f3 bi\u1ec3u th\u1ee9c l\u00e0 u=240\u221a2 cos(100\u03c0t) (V). Bi\u1ec3u th\u1ee9c c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch l\u00e0<\/p>\n

\"\"<\/p>\n

C\u00e2u 12:<\/b>\u00a0\u0110\u1eb7t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u u=Uo<\/sub>\u00a0cos\u03c9t th\u00ec c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch l\u00e0<\/p>\n

\"\"<\/p>\n

\u0110o\u1ea1n m\u1ea1ch \u0111i\u1ec7n c\u00f3<\/p>\n

A. zL<\/sub>\u2212zC<\/sub>=R\u221a2<\/p>\n

B. zC<\/sub>\u2212zL<\/sub>=2R<\/p>\n

C. zL<\/sub>\u2212zC<\/sub>=R<\/p>\n

D. zL<\/sub>\u2212zC<\/sub>=R\u221a3<\/p>\n

C\u00e2u 13:<\/b>\u00a0M\u1ea1ch \u0111i\u1ec7n c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp, cu\u1ed9n c\u1ea3m thu\u1ea7n c\u00f3 \u0111\u1ed9 t\u1ef1 c\u1ea3m L=1\/2\u03c0 (H). \u0110i\u1ec7n \u00e1p xoay chi\u1ec1u \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u \u0111\u1ea1on m\u1ea1ch c\u00f3 bi\u1ec3u th\u1ee9c u=U\u221a2 cos\u2061(2\u03c0ft), trong \u0111\u00f3 U kh\u00f4ng \u0111\u1ed5i v\u00e0 f thay \u0111\u1ed5i \u0111\u01b0\u1ee3c. Khi t\u1ea7n s\u1ed1 f1<\/sub>=50 Hz ho\u1eb7c f2<\/sub>=300 Hz th\u00ec c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch c\u00f3 c\u00f9ng m\u1ed9t gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng. \u0110i\u1ec7n dung C c\u1ee7a t\u1ee5 \u0111i\u1ec7n l\u00e0<\/p>\n

\"\"<\/p>\n

C\u00e2u 14:<\/b><\/p>\n

\"\"<\/p>\n

H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0111\u00e1p \u00e1n<\/b><\/p>\n\n\n\n\n
C\u00e2u<\/td>\n8<\/td>\n9<\/td>\n10<\/td>\n11<\/td>\n12<\/td>\n13<\/td>\n14<\/td>\n<\/tr>\n
\u0110\u00e1p \u00e1n<\/td>\nB<\/td>\nC<\/td>\nD<\/td>\nA<\/td>\nC<\/td>\nC<\/td>\nA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e2u 8:<\/b>\u00a0B<\/p>\n

\"\"<\/p>\n

C\u00e2u 9:<\/b>\u00a0C<\/p>\n

\"\"<\/p>\n

C\u00e2u 10:<\/b>\u00a0D<\/p>\n

V\u00ec I_0 gi\u1ed1ng nhau trong c\u1ea3 4 c\u00e2u tr\u1ea3 l\u1eddi n\u00ean ch\u1ec9 c\u1ea7n t\u00ednh \u03c6 : u_C tr\u1ec5 pha \u03c0\/2 so v\u1edbi i hay i s\u1edbm pha \u03c0\/2 so v\u1edbi u_C , t\u1eeb \u0111\u00f3 suy ra pha ban \u0111\u1ea7u c\u1ee7a i l\u00e0 :<\/p>\n

\"\"<\/p>\n

C\u00e2u 11:<\/b>\u00a0A<\/p>\n

\"\"<\/p>\n

C\u00e2u 12:<\/b>\u00a0C<\/p>\n

\"\"<\/p>\n

C\u00e2u 13:<\/b>\u00a0C<\/p>\n

\"\"<\/p>\n

C\u00e2u 14:<\/b>\u00a0A<\/p>\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00e2u 8:\u00a0M\u1ed9t \u0111\u1ecda m\u1ea1ch c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp, \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi hai c\u1ef1c c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng kh\u00f4ng \u0111\u1ed5i. Thay \u0111\u1ed5i t\u1ea7n s\u1ed1 g\u00f3c c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n ng\u01b0\u1eddi ta nh\u1eadn th\u1ea5y khi n\u00f3 c\u00f3 gi\u00e1 tr\u1ecb l\u00e0 \u03c91\u00a0ho\u1eb7c \u03c92\u00a0(\u03c91\u2260\u03c92) th\u00ec c\u01b0\u1eddng \u0111\u1ed9 hi\u1ec7u d\u1ee5ng c\u1ee7a d\u00f2ng […]<\/p>\n","protected":false},"author":3,"featured_media":26196,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[158],"tags":[1445,1444],"yoast_head":"\nB\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: M\u1ea1ch c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp (ph\u1ea7n 2)<\/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\/bai-tap-trac-nghiem-vat-li-12-mach-co-r-l-c-mac-noi-tiep-phan-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: M\u1ea1ch c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp (ph\u1ea7n 2)\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 8:\u00a0M\u1ed9t \u0111\u1ecda m\u1ea1ch c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp, \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi hai c\u1ef1c c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng kh\u00f4ng \u0111\u1ed5i. 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