L<\/sub>\u00a0c\u1ee7a cu\u1ed9n d\u00e2y v\u00e0 c\u00f4ng su\u1ea5t P c\u1ee7a \u0111o\u1ea1n m\u1ea1ch l\u00e0<\/p>\nA. 60 \u03a9 ; 130 W \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 60 \u03a9 ; 60 W<\/p>\n
C. 100\u03a9 ; 30 W \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 75 \u03a9 ; 60 W<\/p>\n
C\u00e2u 11:<\/b>\u00a0Cho \u0111o\u1ea1n m\u1ea1ch g\u1ed3m bi\u1ebfn tr\u1edf R, cu\u1ed9n d\u00e2y tu\u1ea7n c\u1ea3m c\u00f3 h\u1ec7 s\u1ed1 t\u1ef1 c\u1ea3m L=0,8\/\u03c0 (H); t\u1ee5 \u0111i\u1ec7n c\u00f3 \u0111i\u1ec7n dung C=10-3<\/sup>\/5\u03c0 (F) theo th\u1ee9 t\u1ef1 m\u1eafc li\u00ean ti\u1ebfp nhau v\u00e0o hai \u0111i\u1ec3m A, B. \u0110\u1eb7t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch \u0111i\u1ec7n \u00e1p uAB<\/sub>=200\u221a2 cos100\u03c0t (V), t\u0103ng d\u1ea7n R t\u1eeb gi\u00e1 tr\u1ecb b\u1eb1ng 0 th\u00ec c\u00f4ng su\u1ea5t trong m\u1ea1ch thay \u0111\u1ed5i, gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t c\u1ee7a c\u00f4ng su\u1ea5t ti\u00eau th\u1ee5 trong m\u1ea1ch AB l\u00e0<\/p>\nA. 444 W \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 667 W \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 640 W \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 222 W<\/p>\n
C\u00e2u 12:<\/b>\u00a0\u0110\u1eb7t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng U kh\u00f4ng \u0111\u1ed5i, t\u1ea7n s\u1ed1 f thay \u0111\u1ed5i \u0111\u01b0\u1ee3c v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch g\u1ed3m \u0111i\u1ec7n tr\u1edf thu\u1ea7n, cu\u1ed9n c\u1ea3m thu\u1ea7n v\u00e0 t\u1ee5 \u0111i\u1ec7n m\u1eafc n\u1ed1i ti\u1ebfp. Khi f=fo<\/sub>\u00a0th\u00ec \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng gi\u1eefa hai \u0111\u1ea7u t\u1ee5 \u0111i\u1ec7n UC<\/sub>=U. Khi f=fo<\/sub>+75 (Hz) th\u00ec \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng gi\u1eefa hai \u0111\u1ea7u t\u1ee5 \u0111i\u1ec7n UL<\/sub>=U v\u00e0 h\u1ec7 s\u1ed1 c\u00f4ng su\u00e1t c\u1ee7a to\u00e0n m\u1ea1ch l\u00fac n\u00e0y l\u00e0 1\/\u221a3. H\u1ecfi fo<\/sub>g\u1ea7n v\u1edbi gi\u00e1 tr\u1ecb n\u00e0o nh\u1ea5t sau \u0111\u00e2y?<\/p>\nA. 75 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 25 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 17 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 100 Hz<\/p>\n
C\u00e2u 13:<\/b>\u00a0\u0110\u1eb7t \u0111i\u1ec7n \u00e1p u=U\u221a2 cos\u03c9t v\u00e0o hai \u0111\u1ea7u m\u1ed9t \u0111o\u1ea1n m\u1ea1ch g\u1ed3m bi\u1ebfn tr\u1edf R v\u00e0 t\u1ee5 \u0111i\u1ec7n c\u00f3 \u0111i\u1ec7n dung C m\u1eafc n\u1ed1i ti\u1ebfp. Khi R=R1<\/sub>\u00a0v\u00e0 R=R2<\/sub>=8R1<\/sub>\u00a0th\u00ec c\u00f4ng su\u1ea5t ti\u00eau th\u1ee5 tr\u00ean \u0111o\u1ea1n m\u1ea1ch l\u00e0 nh\u01b0 nhau. H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a \u0111o\u1ea1n m\u1ea1ch \u1ee9ng v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb R1<\/sub>\u00a0v\u00e0 R2<\/sub>\u00a0l\u1ea7n l\u01b0\u1ee3t l\u00e0<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/1-142.png\")
<\/p>\n
C\u00e2u 14:<\/b>\u00a0M\u1ed9t \u0111o\u1ea1n m\u1ea1ch xoay chi\u1ec1u g\u1ed3m \u0111i\u1ec7n tr\u1edf thu\u1ea7n R m\u1eafc n\u1ed1i ti\u1ebfp v\u1edbi cu\u1ed9n d\u00e2y. Bi\u1ebft \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y l\u00e0 45 V, gi\u1eefa hai \u0111\u1ea7u \u0111i\u1ec7n tr\u1edf thu\u1ea7n l\u00e0 30 V, gi\u1eefa hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch l\u00e0 60 V. H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a cu\u1ed9n d\u00e2y l\u00e0<\/p>\n
A. 0,125 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 0,15 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 0,375 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 0,25<\/p>\n
C\u00e2u 15:<\/b>\u00a0Cho \u0111o\u1ea1n m\u1ea1ch xoay chi\u1ec1u c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp, trong \u0111\u00f3 R l\u00e0 m\u1ed9t bi\u1ebfn tr\u1edf. \u0110\u1eb7t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch m\u1ed9t \u0111i\u1ec7n \u00e1p u=Uo<\/sub>cos\u03c9t. Khi \u0111i\u1ec7n tr\u1edf c\u1ee7a bi\u1ebfn tr\u1edf b\u1eb1ng R1<\/sub>\u00a0ho\u1eb7c R2<\/sub>\u00a0th\u00ec \u0111o\u1ea1n m\u1ea1ch ti\u00eau th\u1ee5 c\u00f9ng c\u00f4ng su\u1ea5t l\u00e0 P. Khi \u0111i\u1ec1u ch\u1ec9nh bi\u1ebfn tr\u1edf, c\u00f4ng su\u1ea5t c\u1ef1c \u0111\u1ea1i c\u1ee7a \u0111o\u1ea1n m\u1ea1ch l\u00e0<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/2-52.png\")
<\/p>\n
C\u00e2u 16:<\/b>\u00a0Cho m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u n\u1ed1i ti\u1ebfp g\u1ed3m \u0111o\u1ea1n m\u1ea1ch AM ch\u1ee9a \u0111i\u1ec7n tr\u1edf thu\u1ea7n R m\u1eafc v\u1edbi \u0111o\u1ea1n m\u1ea1ch MN ch\u1ee9a cu\u1ed9n d\u00e2y kh\u00f4ng thu\u1ea7n c\u1ea3m, c\u00f3 \u0111i\u1ec7n tr\u1edf r = R; \u0111\u1ed9 t\u1ef1 c\u1ea3m L v\u00e0 \u0111o\u1ea1n m\u1ea1ch NB ch\u1ec9 ch\u1ee9a t\u1ee5 \u0111i\u1ec7n C. Gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng c\u1ee7a \u0111i\u1ec7n \u00e1p UAB<\/sub>=UNB<\/sub>. H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t tr\u00ean cu\u1ed9n d\u00e2y l\u00e0 0,6. H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a c\u1ea3 m\u1ea1ch b\u1eb1ng<\/p>\nA. 0,923 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 0,683 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 0,752 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 0,854<\/p>\n
C\u00e2u 17:<\/b>\u00a0\u0110\u1eb7t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng kh\u00f4ng \u0111\u1ed5i, t\u1ea7n s\u1ed1 50 Hz v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch m\u1eafc n\u1ed1i ti\u1ebfp g\u1ed3m \u0111i\u1ec7n tr\u1edf thu\u1ea7n R, cu\u1ed9n c\u1ea3m thu\u1ea7n c\u00f3 \u0111\u1ed9 t\u1ef1 c\u1ea3m L thay \u0111\u1ed5i \u0111\u01b0\u1ee3 cv\u00e0 t\u1ee5 \u0111i\u1ec7n \u0111i\u1ec7n c\u00f3 \u0111i\u1ec7n dung C. \u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 t\u1ef1 c\u1ea3m L \u0111\u1ebfn gi\u00e1 tr\u1ecb 1\/\u03c0 (H) ho\u1eb7c 3\/\u03c0 (H) th\u00ec c\u00f4ng su\u1ea5t ti\u00eau th\u1ee5 tr\u00ean \u0111o\u1ea1n m\u1ea1ch c\u00f3 c\u00f9ng gi\u00e1 tr\u1ecb. Gi\u00e1 tr\u1ecb c\u1ee7 \u0111i\u1ec7n dung C b\u1eb1ng<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/3-26.png\")
<\/p>\n
H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0111\u00e1p \u00e1n<\/b><\/p>\n\n\n\n| C\u00e2u<\/td>\n | 10<\/td>\n | 11<\/td>\n | 12<\/td>\n | 13<\/td>\n | 14<\/td>\n | 15<\/td>\n | 16<\/td>\n | 17<\/td>\n<\/tr>\n |
\n| \u0110\u00e1p \u00e1n<\/td>\n | A<\/td>\n | B<\/td>\n | C<\/td>\n | A<\/td>\n | D<\/td>\n | B<\/td>\n | A<\/td>\n | B<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n C\u00e2u 10:<\/b>\u00a0A<\/p>\n ![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/4-21.png\") <\/p>\n
C\u00e2u 11:<\/b>\u00a0B<\/p>\n ![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/5-15.png\") <\/p>\n
C\u00e2u 12:<\/b>\u00a0C<\/p>\n ![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/6-14.png\") <\/p>\n
C\u00e2u 13:<\/b>\u00a0A<\/p>\n ![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/7-11.png\") <\/p>\n
C\u00e2u 14:<\/b>\u00a0D<\/p>\n ![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/8-8.png\") <\/p>\n
C\u00e2u 15:<\/b>\u00a0B<\/p>\n ![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/9-7.png\") <\/p>\n
C\u00e2u 16:<\/b>\u00a0A<\/p>\n ![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/10-3.png\") <\/p>\n
C\u00e2u 17:<\/b>\u00a0B<\/p>\n ![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/11-2.png\") <\/p>\n","protected":false},"excerpt":{"rendered":"
C\u00e2u 10:\u00a0\u0110\u1eb7t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng U = 130 V v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch g\u1ed3m \u1ed9t bi\u1ebfn tr\u1edf n\u1ed1i ti\u1ebfp v\u1edbi m\u1ed9t cu\u1ed9n c\u1ea3m thu\u1ea7n. Khi bi\u1ebfn tr\u1edf c\u00f3 gi\u00e1 tr\u1ecb l\u00e0 R1=40 \u03a9 ho\u1eb7c R2=90 \u03a9 th\u00ec c\u00f4ng su\u1ea5t c\u1ee7a m\u1ea1ch \u0111\u1ec1u l\u00e0 P. C\u1ea3m kh\u00e1ng ZL\u00a0c\u1ee7a cu\u1ed9n […]<\/p>\n","protected":false},"author":3,"featured_media":25969,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[158],"tags":[1443,1442],"yoast_head":"\n B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: C\u00f4ng su\u1ea5t \u0111i\u1ec7n ti\u00eau th\u1ee5 c\u1ee7a m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u - H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t (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-cong-suat-dien-tieu-thu-cua-mach-dien-xoay-chieu-he-so-cong-suat-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: C\u00f4ng su\u1ea5t \u0111i\u1ec7n ti\u00eau th\u1ee5 c\u1ee7a m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u - H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t (ph\u1ea7n 2)\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 10:\u00a0\u0110\u1eb7t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng U = 130 V v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch g\u1ed3m \u1ed9t bi\u1ebfn tr\u1edf n\u1ed1i ti\u1ebfp v\u1edbi m\u1ed9t cu\u1ed9n c\u1ea3m thu\u1ea7n. Khi bi\u1ebfn tr\u1edf c\u00f3 gi\u00e1 tr\u1ecb l\u00e0 R1=40 \u03a9 ho\u1eb7c R2=90 \u03a9 th\u00ec c\u00f4ng su\u1ea5t c\u1ee7a m\u1ea1ch \u0111\u1ec1u l\u00e0 P. 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