B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: Ch\u01b0\u01a1ng 3 (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-chuong-3-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: Ch\u01b0\u01a1ng 3 (ph\u1ea7n 2)\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 7:\u00a0\u0110\u1eb7t \u0111i\u1ec7n \u00e1p u=U\u221a2 cos\u03c9t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch R, L, C m\u1eafc n\u1ed1i ti\u1ebfp c\u00f3 \u0111i\u1ec7n dung C thay \u0111\u1ed5i \u0111\u01b0\u1ee3c. \u0110i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng UR\u00a0\u0111\u1ea1t c\u1ef1c \u0111\u1ea1i khi ZC\u00a0c\u00f3 gi\u00e1 tr\u1ecb C\u00e2u 8:\u00a0\u0110\u1eb7t \u0111i\u1ec7n \u00e1p \u00e1p u=U\u221a2 cos\u03c9t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch R, L, C m\u1eafc n\u1ed1i ti\u1ebfp c\u00f3 \u0111i\u1ec7n […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-vat-li-12-chuong-3-phan-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Lop12.edu.vn - 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C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12 l\u1edbn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam","article_published_time":"2018-04-09T10:48:01+00:00","og_image":[{"width":270,"height":109,"url":"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/1-138.png","type":"image\/png"}],"author":"H\u00e0 Trang","twitter_card":"summary_large_image","twitter_misc":{"Written by":"H\u00e0 Trang","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-vat-li-12-chuong-3-phan-2\/","url":"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-vat-li-12-chuong-3-phan-2\/","name":"B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: Ch\u01b0\u01a1ng 3 (ph\u1ea7n 2)","isPartOf":{"@id":"https:\/\/lop12.edu.vn\/#website"},"datePublished":"2018-04-09T10:48:01+00:00","dateModified":"2018-04-09T10:48:01+00:00","author":{"@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45"},"breadcrumb":{"@id":"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-vat-li-12-chuong-3-phan-2\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-vat-li-12-chuong-3-phan-2\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-vat-li-12-chuong-3-phan-2\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/lop12.edu.vn\/"},{"@type":"ListItem","position":2,"name":"B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: Ch\u01b0\u01a1ng 3 (ph\u1ea7n 2)"}]},{"@type":"WebSite","@id":"https:\/\/lop12.edu.vn\/#website","url":"https:\/\/lop12.edu.vn\/","name":"Lop12.edu.vn - 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{"id":25927,"date":"2018-04-09T17:48:01","date_gmt":"2018-04-09T10:48:01","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=25927"},"modified":"2018-04-09T17:48:01","modified_gmt":"2018-04-09T10:48:01","slug":"bai-tap-trac-nghiem-vat-li-12-chuong-3-phan-2","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-vat-li-12-chuong-3-phan-2\/","title":{"rendered":"B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: Ch\u01b0\u01a1ng 3 (ph\u1ea7n 2)"},"content":{"rendered":"

C\u00e2u 7:<\/b>\u00a0\u0110\u1eb7t \u0111i\u1ec7n \u00e1p u=U\u221a2 cos\u03c9t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch R, L, C m\u1eafc n\u1ed1i ti\u1ebfp c\u00f3 \u0111i\u1ec7n dung C thay \u0111\u1ed5i \u0111\u01b0\u1ee3c. \u0110i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng U_{R<\/sub>\u00a0\u0111\u1ea1t c\u1ef1c \u0111\u1ea1i khi Z_{C<\/sub>\u00a0c\u00f3 gi\u00e1 tr\u1ecb<\/p>\n}}

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C\u00e2u 8:<\/b>\u00a0\u0110\u1eb7t \u0111i\u1ec7n \u00e1p \u00e1p u=U\u221a2 cos\u03c9t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch R, L, C m\u1eafc n\u1ed1i ti\u1ebfp c\u00f3 \u0111i\u1ec7n dung C thay \u0111\u1ed5i \u0111\u01b0\u1ee3c. \u0110i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng U_{C<\/sub>\u00a0\u0111\u1ea1t c\u1ef1c \u0111\u1ea1i khi Z_{Cm<\/sub>= v\u00e0 U_{Cmax<\/sub>\u00a0c\u00f3 bi\u1ebbu th\u1ee9c<\/p>\n}}}

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C\u00e2u 9:<\/b>\u00a0\u0110\u1eb7t \u0111i\u1ec7n \u00e1p \u00e1p u=U\u221a2 cos\u03c9t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch R, L, C m\u1eafc n\u1ed1i ti\u1ebfp c\u00f3 \u0111\u1ed9 t\u1ef1 c\u1ea3m L thay \u0111\u1ed5i \u0111\u01b0\u1ee3c. \u0110i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng U_{L<\/sub>\u00a0\u0111\u1ea1t c\u1ef1c \u0111\u1ea1i khi Z_{Lm<\/sub>\u00a0v\u00e0 U_{Lmax<\/sub>\u00a0c\u00f3 bi\u1ebbu th\u1ee9c<\/p>\n}}}

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C\u00e2u 10:<\/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=U\u221a2 cos\u03c9t. Khi \u0111i\u1ec7n tr\u1edf c\u1ee7a bi\u1ebfn tr\u1edf b\u1eb1ng R_{1<\/sub>\u00a0ho\u1eb7c R_{2<\/sub>\u00a0th\u00ec \u0111o\u1ea1n m\u1ea1ch ti\u00eau th\u1ee5 c\u00f9ng c\u00f4ng su\u1ea5t l\u00e0 P. C\u00f4ng su\u1ea5t \u0111\u00f3 c\u00f3 gi\u00e1 tr\u1ecb l\u00e0<\/p>\n}}

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C\u00e2u 11:<\/b>\u00a0Cho \u0111o\u1ea1n m\u1ea1ch xoay chi\u1ec1u 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 thay \u0111\u1ed5i. \u0110\u1eb7t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u c\u00f3 U v\u00e0 \u03c9 kh\u00f4ng thay \u0111\u1ed5i. Khi \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 t\u1ef1 c\u1ea3m \u0111\u1ebfn gi\u00e1 tr\u1ecb L=2\/(\u03c9^{2<\/sup>C) th\u00ec \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng gi\u1eefa hai \u0111\u1ea7u cu\u1ed9n c\u1ea3m L \u0111\u1ea1t gi\u00e1 tr\u1ecb c\u1ef1c \u0111\u1ea1i. Khi \u0111\u00f3 \u0111\u1ed9 l\u1ec7ch pha gi\u1eefa \u0111i\u1ec7n \u00e1p u v\u00e0 i trong \u0111o\u1ea1n m\u1ea1ch l\u00e0<\/p>\n}

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C\u00e2u 12:<\/b>\u00a0Cho m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u g\u1ed3m \u0111i\u1ec7n tr\u1edf thu\u1ea7n R = 50 \u03a9, t\u1ee5 \u0111i\u1ec7n c\u00f3 dung kh\u00e1ng l\u00e0 50 \u03a9 v\u00e0 m\u1ed9t cu\u1ecdn c\u1ea3m thu\u1ea7n c\u00f3 c\u1ea3m kh\u00e1ng l\u00e0 100 \u03a9 m\u1eafc n\u1ed1i ti\u1ebfp. \u0110i\u1ec7n \u00e1p gi\u1eefa hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch c\u00f3 bi\u1ec3u th\u1ee9c u=200\u221a2 cos\u2061100\u03c0t (V). Bi\u1ec3u th\u1ee9c c\u1ee7a \u0111i\u1ec7n \u00e1p gi\u1eefa hai \u0111\u1ea7u cu\u1ed9n d\u00e2y l\u00e0<\/p>\n

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H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0111\u00e1p \u00e1n<\/b><\/p>\n\n\n\n\n
C\u00e2u<\/td>\n 7<\/td>\n 8<\/td>\n 9<\/td>\n 10<\/td>\n 11<\/td>\n 12<\/td>\n<\/tr>\n
\u0110\u00e1p \u00e1n<\/td>\n B<\/td>\n A<\/td>\n B<\/td>\n A<\/td>\n D<\/td>\n C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
C\u00e2u 8:<\/b>\u00a0A<\/p>\n
$\"\"$ <\/p>\n
C\u00e2u 9:<\/b>\u00a0B<\/p>\n
$\"\"$ <\/p>\n
C\u00e2u 10:<\/b>\u00a0A<\/p>\n
T\u1eeb \u0111i\u1ec7n ki\u1ec7n c\u00f4ng su\u1ea5t b\u1eb1ng nhau suy ra :<\/p>\n
$\"\"$ <\/p>\n
C\u00e2u 11:<\/b>\u00a0D<\/p>\n
$\"\"$ <\/p>\n
C\u00e2u 12:<\/b>\u00a0C<\/p>\n
$\"\"$ <\/p>\n","protected":false},"excerpt":{"rendered":"
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