C\u1eadp nh\u1eadt \u0111\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n v\u1eadt l\u00fd n\u0103m 2016 gi\u00fap c\u00e1c em l\u00e0m quen v\u1edbi c\u00e1c d\u1ea1ng b\u00e0i \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 thi THPT Qu\u1ed1c gia s\u1eafp t\u1edbi.<\/strong><\/h2>\n\nXem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n L\u00fd<\/p>\n<\/div>\n
\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n V\u1eadt L\u00fd n\u0103m 2016 – \u0110\u1ec1 s\u1ed1 9<\/strong><\/span><\/p>\n![](\"http:\/\/img.toanhoc247.com\/picture\/2015\/1109\/91.png\")
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<\/strong><\/span><\/p>\nC\u00e2u 3:<\/strong>(ID: 86032)<\/strong>Khi n\u00f3i v\u1ec1 s\u00f3ng d\u1eebng tr\u00ean m\u1ed9t s\u1ee3i d\u00e2y \u0111\u00e0n h\u1ed3i, ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2ysai<\/strong>?<\/p>\nA.<\/strong>Kho\u1ea3ng c\u00e1ch t\u1eeb m\u1ed9t n\u00fat \u0111\u1ebfn b\u1ee5ng li\u1ec1n k\u1ec1 b\u1eb1ng 25% c\u1ee7a b\u01b0\u1edbc s\u00f3ng.<\/p>\nB.<\/strong>Kho\u1ea3ng c\u00e1ch gi\u1eefa hai b\u1ee5ng li\u00ean ti\u1ebfp l\u00e0 m\u1ed9t b\u01b0\u1edbc s\u00f3ng.<\/p>\nC.<\/strong>L\u00e0 hi\u1ec7n t\u01b0\u1ee3ng giao thoa c\u1ee7a s\u00f3ng t\u1edbi v\u00e0 s\u00f3ng ph\u1ea3n x\u1ea1.<\/p>\nD.<\/strong>Kho\u1ea3ng c\u00e1ch gi\u1eefa hai n\u00fat li\u00ean ti\u1ebfp l\u00e0 n\u1eeda b\u01b0\u1edbc s\u00f3ng.<\/p>\nC\u00e2u 4:<\/strong>(ID: 86033)<\/strong>Trong m\u1ed9t m\u1ea1ch dao \u0111\u1ed9ng LC l\u00ed t\u01b0\u1edfng \u0111ang c\u00f3 dao \u0111\u1ed9ng \u0111i\u1ec7n t\u1eeb t\u1ef1 do. \u0110i\u1ec7n \u00e1p c\u1ef1c \u0111\u1ea1i gi\u1eefa hai b\u1ea3n t\u1ee5 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u1ef1c \u0111\u1ea1i trong m\u1ea1ch l\u1ea7n l\u01b0\u1ee3t l\u00e0 U<\/p>\n0<\/dd>\nv\u00e0 I<\/p>\n
0<\/dd>\n. T\u1ea1i th\u1eddi \u0111i\u1ec3m c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch c\u00f3 gi\u00e1 tr\u1ecb I<\/p>\n
0<\/dd>\n\/2 th\u00ec \u0111\u1ed9 l\u1edbn \u0111i\u1ec7n \u00e1p gi\u1eefa hai b\u1ea3n t\u1ee5 l\u00e0<\/p>\n
A.<\/strong>U<\/p>\n0<\/dd>\n\/2. B.![](\"http:\/\/img.toanhoc247.com\/picture\/2015\/1109\/92.png\")
<\/strong> C.<\/strong>3U<\/p>\n0<\/dd>\n\/4. ![](\"http:\/\/img.toanhoc247.com\/picture\/2015\/1109\/94.png\")
<\/strong><\/p>\nC\u00e2u 5:<\/strong>(ID: 86034)<\/strong> K\u1ebft lu\u1eadn n\u00e0o sau \u0111\u00e2y l\u00e0<\/span>sai<\/strong>?<\/span><\/p>\nA.<\/strong>Khi g\u1eb7p v\u1eadt c\u1ea3n c\u1ed1 \u0111\u1ecbnh, s\u00f3ng ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c pha v\u1edbi s\u00f3ng t\u1edbi \u1edf \u0111i\u1ec3m ph\u1ea3n x\u1ea1.<\/p>\nB.<\/strong>S\u00f3ng c\u01a1 ngang c\u00f3 th\u1ec3 truy\u1ec1n \u0111\u01b0\u1ee3c trong ch\u1ea5t r\u1eafn v\u00e0 ch\u1ea5t l\u1ecfng.<\/p>\nC.<\/strong>Khi g\u1eb7p v\u1eadt c\u1ea3n t\u1ef1 do, s\u00f3ng ph\u1ea3n x\u1ea1 c\u00f9ng pha v\u1edbi s\u00f3ng t\u1edbi \u1edf \u0111i\u1ec3m ph\u1ea3n x\u1ea1.<\/p>\nD.<\/strong>S\u00f3ng c\u00f3 c\u00e1c ph\u1ea7n t\u1eed m\u00f4i tr\u01b0\u1eddng dao \u0111\u1ed9ng theo ph\u01b0\u01a1ng tr\u00f9ng v\u1edbi ph\u01b0\u01a1ng truy\u1ec1n s\u00f3ng l\u00e0 s\u00f3ng d\u1ecdc.<\/p>\nC\u00e2u 6:<\/strong>(ID: 86035)<\/strong>M\u1ea1ch \u0111i\u1ec7n xoay RLC v\u1edbi cu\u1ed9n c\u1ea3m thu\u1ea7n c\u00f3 \u0111\u1ed9 t\u1ef1 c\u1ea3m thay \u0111\u1ed5i \u0111\u01b0\u1ee3c. \u0110\u1eb7t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng v\u00e0 t\u1ea7n s\u1ed1 x\u00e1c \u0111\u1ecbnh. Khi ch\u1ec9nh L \u0111\u1ebfn gi\u00e1 tr\u1ecb L = L<\/p>\n1<\/dd>\n= 2mH v\u00e0 L = L<\/p>\n
2<\/dd>\n= 4,5mH th\u00ec \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng hai \u0111\u1ea7u cu\u1ed9n c\u1ea3m trong hai tr\u01b0\u1eddng h\u1ee3p nh\u01b0 nhau. Khi \u0111i\u1ec1u ch\u1ec9nh L = L3 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng gi\u1eefa hai \u0111\u1ea7u cu\u1ed9n c\u1ea3m c\u1ef1c \u0111\u1ea1i. T\u00ecm L<\/p>\n
3<\/dd>\n.<\/p>\n
A.<\/strong>3,0mH B.<\/strong>3,3mH C.<\/strong>2,8mH D.<\/strong>1,5mH<\/p>\nC\u00e2u 7:<\/strong>(ID: 86036)<\/strong>M\u1ed9t ch\u1ea5t \u0111i\u1ec3m dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a theo ph\u01b0\u01a1ng tr\u00ecnh x = 5sin(2\u03c0t + \u03c0\/3)cm. K\u1ec3 t\u1eeb l\u00fac t = 0, th\u1eddi \u0111i\u1ec3m ch\u1ea5t \u0111i\u1ec3m \u0111i qua v\u1ecb tr\u00ed c\u00f3 li \u0111\u1ed9 x = -2,5cm theo chi\u1ec1u d\u01b0\u01a1ng l\u1ea7n th\u1ee9 2015 l\u00e0<\/p>\nA. 2014,42s B. 2014,75s C. 1007,42s D. 2014,5s<\/p>\n
C\u00e2u 8:<\/strong>(ID: 86037)<\/strong>M\u1ed9t con l\u1eafc \u0111\u01a1n g\u1ed3m v\u1eadt nh\u1ecf kh\u1ed1i l\u01b0\u1ee3ng m treo v\u00e0o d\u00e2y d\u00e0i \u2113. T\u1eeb v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng, k\u00e9o con l\u1eafc \u0111\u1ec3 d\u00e2y treo l\u1ec7ch g\u00f3c nh\u1ecf so v\u1edbi ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng r\u1ed3i bu\u00f4ng nh\u1eb9. B\u1ecf qua s\u1ee9c c\u1ea3n kh\u00f4ng kh\u00ed. C\u01a1 n\u0103ng c\u1ee7a con l\u1eafc b\u1eb1ng:<\/p>\n![](\"http:\/\/img.toanhoc247.com\/picture\/2015\/1109\/93.png\")
<\/p>\n
C\u00e2u 9:<\/strong>(ID: 86038)<\/strong>M\u1ed9t \u0111o\u1ea1n m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u g\u1ed3m \u0111i\u1ec7n tr\u1edf R m\u1eafc n\u1ed1i ti\u1ebfp v\u1edbi cu\u1ed9n d\u00e2y thu\u1ea7n c\u1ea3m c\u00f3 \u0111\u1ed9 t\u1ef1 c\u1ea3m L. M\u1eafc hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch tr\u00ean v\u00e0o \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng kh\u00f4ng \u0111\u1ed5i. N\u1ebfu t\u0103ng t\u1ea7n s\u1ed1 c\u1ee7a \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u \u1edf hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch th\u00ec<\/p>\nA.<\/strong>c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n hi\u1ec7u d\u1ee5ng qua m\u1ea1ch s\u1ebd gi\u1ea3m.<\/p>\nB.<\/strong>c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n hi\u1ec7u d\u1ee5ng qua m\u1ea1ch s\u1ebd t\u0103ng.<\/p>\nC.<\/strong>c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n hi\u1ec7u d\u1ee5ng qua m\u1ea1ch s\u1ebd kh\u00f4ng thay \u0111\u1ed5i.<\/p>\nD.<\/strong>s\u1ebd x\u1ea3y ra s\u1ef1 c\u1ed9ng h\u01b0\u1edfng \u0111i\u1ec7n trong \u0111o\u1ea1n m\u1ea1ch.<\/p>\nC\u00e2u 10: (ID: 86039)<\/strong>M\u1ea1ch R,L,C (cu\u1ed9n d\u00e2y thu\u1ea7n c\u1ea3m) cho \u1edf h\u00ecnh v\u1ebd:<\/p>\n![](\"http:\/\/img.toanhoc247.com\/picture\/2015\/1109\/96.png\")
<\/p>\n
C\u00e1c gi\u00e1 tr\u1ecb R,L,f v\u00e0 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng U \u1edf hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch kh\u00f4ng \u0111\u1ed5i, c\u00f2n \u0111i\u1ec7n dung C thay \u0111\u1ed5i \u0111\u01b0\u1ee3c; c\u00e1c v\u00f4n k\u1ebf l\u00ed t\u01b0\u1edfng. Ban \u0111\u1ea7u \u0111i\u1ec7n dung C \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u1edf gi\u00e1 tr\u1ecb![](\"http:\/\/img.toanhoc247.com\/picture\/2015\/1109\/95.png\")
. N\u1ebfu \u0111i\u1ec7n dung C gi\u1ea3m t\u1eeb gi\u00e1 tr\u1ecb C<\/p>\n
0<\/dd>\n th\u00ec:<\/p>\n
A.<\/strong>s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n1<\/dd>\ngi\u1ea3m v\u00e0 s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n
2<\/dd>\ngi\u1ea3m.<\/p>\n
B.<\/strong>s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n1<\/dd>\nt\u0103ng v\u00e0 s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n
2<\/dd>\ngi\u1ea3m.<\/p>\n
C.<\/strong>s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n1<\/dd>\ngi\u1ea3m v\u00e0 s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n
2<\/dd>\nt\u0103ng.<\/p>\n
D.<\/strong>s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n1<\/dd>\nt\u0103ng v\u00e0 s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n
2<\/dd>\nt\u0103ng.<\/p>\n
![](\"http:\/\/img.toanhoc247.com\/picture\/2015\/1109\/97.png\")
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C\u00e2u 12:<\/strong>(ID: 86041)<\/strong> M\u1ed9t m\u00e1y h\u1ea1 \u00e1p l\u00ed t\u01b0\u1edfng l\u00fac m\u1edbi s\u1ea3n xu\u1ea5t c\u00f3 t\u1ec9 s\u1ed1 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng cu\u1ed9n th\u1ee9 c\u1ea5p v\u00e0 s\u01a1 c\u1ea5p b\u1eb1ng 0,5. Sau m\u1ed9t th\u1eddi gian s\u1eed d\u1ee5ng do l\u1edbp c\u00e1ch \u0111i\u1ec7n k\u00e9m n\u00ean c\u00f3 x v\u00f2ng d\u00e2y c\u1ee7a cu\u1ed9n th\u1ee9 c\u1ea5p b\u1ecb n\u1ed1i t\u1eaft v\u00ec v\u1eady t\u1ec9 s\u1ed1 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng cu\u1ed9n th\u1ee9 c\u1ea5p v\u00e0 s\u01a1 c\u1ea5p ch\u1ec9 c\u00f2n 0,4. \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh x ngu\u1eddi ta cu\u1ed1n th\u00eam v\u00e0o cu\u1ed9n th\u1ee9 c\u1ea5p 36 v\u00f2ng d\u00e2y th\u00ec th\u1ea5y t\u1ec9 s\u1ed1 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng cu\u1ed9n th\u1ee9 c\u1ea5p v\u00e0 s\u01a1 c\u1ea5p b\u1eb1ng 0,625. Gi\u00e1 tr\u1ecb c\u1ee7a x l\u00e0<\/p>\nA.<\/strong>16 B.<\/strong>20 C.<\/strong>32 D.<\/strong>160<\/p>\nC\u00e2u 13:<\/strong>(ID: 86042)<\/strong>M\u1ed9t con l\u1eafc l\u00f2 xo g\u1ed3m qu\u1ea3 n\u1eb7ng kh\u1ed1i l\u01b0\u1ee3ng m g\u1eafn v\u1edbi l\u00f2 xo nh\u1eb9 \u0111\u1ed9 c\u1ee9ng k dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a v\u1edbi bi\u00ean \u0111\u1ed9 A v\u00e0 t\u1ea7n s\u1ed1 g\u00f3c \u03c9. T\u1ea1i th\u1eddi \u0111i\u1ec3m m\u00e0 th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i c\u1ee7a l\u00f2 xo g\u1ea5p 3 l\u1ea7n \u0111\u1ed9ng n\u0103ng c\u1ee7a q\u1ee7a n\u1eb7ng th\u00ec \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c h\u1ed3i ph\u1ee5c l\u00e0:<\/p>\n![](\"http:\/\/img.toanhoc247.com\/picture\/2015\/1109\/98.png\")
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![](\"http:\/\/img.toanhoc247.com\/picture\/2015\/1109\/99.png\")
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\u0110\u00e1p \u00e1n \u0111\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n V\u1eadt L\u00fd n\u0103m 2016- \u0110\u1ec1 s\u1ed1 9<\/strong><\/span><\/p>\n![](\"http:\/\/img.toanhoc247.com\/picture\/2015\/1109\/910.png\")
<\/strong><\/span><\/p>\n<\/p>\nT\u1ea5t c\u1ea3 n\u1ed9i dung b\u00e0i vi\u1ebft. C\u00e1c em h\u00e3y xem th\u00eam v\u00e0 t\u1ea3i file chi ti\u1ebft t\u1ea1i \u0111\u00e2y:<\/strong>Download<\/p>\n","protected":false},"excerpt":{"rendered":"C\u1eadp nh\u1eadt \u0111\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n v\u1eadt l\u00fd n\u0103m 2016 gi\u00fap c\u00e1c em l\u00e0m quen v\u1edbi c\u00e1c d\u1ea1ng b\u00e0i \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 thi THPT Qu\u1ed1c gia s\u1eafp t\u1edbi. Xem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n L\u00fd \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n V\u1eadt L\u00fd n\u0103m 2016 – \u0110\u1ec1 s\u1ed1 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[25],"tags":[],"yoast_head":"\n
\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n V\u1eadt L\u00fd 2016 - \u0110\u1ec1 s\u1ed1 9<\/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\/de-thi-thu-thpt-quoc-gia-mon-vat-ly-2016-de-so-9\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n V\u1eadt L\u00fd 2016 - \u0110\u1ec1 s\u1ed1 9\" \/>\n<meta property=\"og:description\" content=\"C\u1eadp nh\u1eadt \u0111\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n v\u1eadt l\u00fd n\u0103m 2016 gi\u00fap c\u00e1c em l\u00e0m quen v\u1edbi c\u00e1c d\u1ea1ng b\u00e0i \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 thi THPT Qu\u1ed1c gia s\u1eafp t\u1edbi. 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Xem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n L\u00fd<\/p>\n<\/div>\n
\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n V\u1eadt L\u00fd n\u0103m 2016 – \u0110\u1ec1 s\u1ed1 9<\/strong><\/span><\/p>\n C\u00e2u 3:<\/strong>(ID: 86032)<\/strong>Khi n\u00f3i v\u1ec1 s\u00f3ng d\u1eebng tr\u00ean m\u1ed9t s\u1ee3i d\u00e2y \u0111\u00e0n h\u1ed3i, ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2ysai<\/strong>?<\/p>\n A.<\/strong>Kho\u1ea3ng c\u00e1ch t\u1eeb m\u1ed9t n\u00fat \u0111\u1ebfn b\u1ee5ng li\u1ec1n k\u1ec1 b\u1eb1ng 25% c\u1ee7a b\u01b0\u1edbc s\u00f3ng.<\/p>\n B.<\/strong>Kho\u1ea3ng c\u00e1ch gi\u1eefa hai b\u1ee5ng li\u00ean ti\u1ebfp l\u00e0 m\u1ed9t b\u01b0\u1edbc s\u00f3ng.<\/p>\n C.<\/strong>L\u00e0 hi\u1ec7n t\u01b0\u1ee3ng giao thoa c\u1ee7a s\u00f3ng t\u1edbi v\u00e0 s\u00f3ng ph\u1ea3n x\u1ea1.<\/p>\n D.<\/strong>Kho\u1ea3ng c\u00e1ch gi\u1eefa hai n\u00fat li\u00ean ti\u1ebfp l\u00e0 n\u1eeda b\u01b0\u1edbc s\u00f3ng.<\/p>\n C\u00e2u 4:<\/strong>(ID: 86033)<\/strong>Trong m\u1ed9t m\u1ea1ch dao \u0111\u1ed9ng LC l\u00ed t\u01b0\u1edfng \u0111ang c\u00f3 dao \u0111\u1ed9ng \u0111i\u1ec7n t\u1eeb t\u1ef1 do. \u0110i\u1ec7n \u00e1p c\u1ef1c \u0111\u1ea1i gi\u1eefa hai b\u1ea3n t\u1ee5 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u1ef1c \u0111\u1ea1i trong m\u1ea1ch l\u1ea7n l\u01b0\u1ee3t l\u00e0 U<\/p>\n v\u00e0 I<\/p>\n . T\u1ea1i th\u1eddi \u0111i\u1ec3m c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch c\u00f3 gi\u00e1 tr\u1ecb I<\/p>\n \/2 th\u00ec \u0111\u1ed9 l\u1edbn \u0111i\u1ec7n \u00e1p gi\u1eefa hai b\u1ea3n t\u1ee5 l\u00e0<\/p>\n A.<\/strong>U<\/p>\n \/2. B. \/4. C\u00e2u 5:<\/strong>(ID: 86034)<\/strong> K\u1ebft lu\u1eadn n\u00e0o sau \u0111\u00e2y l\u00e0<\/span>sai<\/strong>?<\/span><\/p>\n A.<\/strong>Khi g\u1eb7p v\u1eadt c\u1ea3n c\u1ed1 \u0111\u1ecbnh, s\u00f3ng ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c pha v\u1edbi s\u00f3ng t\u1edbi \u1edf \u0111i\u1ec3m ph\u1ea3n x\u1ea1.<\/p>\n B.<\/strong>S\u00f3ng c\u01a1 ngang c\u00f3 th\u1ec3 truy\u1ec1n \u0111\u01b0\u1ee3c trong ch\u1ea5t r\u1eafn v\u00e0 ch\u1ea5t l\u1ecfng.<\/p>\n C.<\/strong>Khi g\u1eb7p v\u1eadt c\u1ea3n t\u1ef1 do, s\u00f3ng ph\u1ea3n x\u1ea1 c\u00f9ng pha v\u1edbi s\u00f3ng t\u1edbi \u1edf \u0111i\u1ec3m ph\u1ea3n x\u1ea1.<\/p>\n D.<\/strong>S\u00f3ng c\u00f3 c\u00e1c ph\u1ea7n t\u1eed m\u00f4i tr\u01b0\u1eddng dao \u0111\u1ed9ng theo ph\u01b0\u01a1ng tr\u00f9ng v\u1edbi ph\u01b0\u01a1ng truy\u1ec1n s\u00f3ng l\u00e0 s\u00f3ng d\u1ecdc.<\/p>\n C\u00e2u 6:<\/strong>(ID: 86035)<\/strong>M\u1ea1ch \u0111i\u1ec7n xoay RLC v\u1edbi cu\u1ed9n c\u1ea3m thu\u1ea7n c\u00f3 \u0111\u1ed9 t\u1ef1 c\u1ea3m thay \u0111\u1ed5i \u0111\u01b0\u1ee3c. \u0110\u1eb7t v\u00e0o hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng v\u00e0 t\u1ea7n s\u1ed1 x\u00e1c \u0111\u1ecbnh. Khi ch\u1ec9nh L \u0111\u1ebfn gi\u00e1 tr\u1ecb L = L<\/p>\n = 2mH v\u00e0 L = L<\/p>\n = 4,5mH th\u00ec \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng hai \u0111\u1ea7u cu\u1ed9n c\u1ea3m trong hai tr\u01b0\u1eddng h\u1ee3p nh\u01b0 nhau. Khi \u0111i\u1ec1u ch\u1ec9nh L = L3 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng gi\u1eefa hai \u0111\u1ea7u cu\u1ed9n c\u1ea3m c\u1ef1c \u0111\u1ea1i. T\u00ecm L<\/p>\n .<\/p>\n A.<\/strong>3,0mH B.<\/strong>3,3mH C.<\/strong>2,8mH D.<\/strong>1,5mH<\/p>\n C\u00e2u 7:<\/strong>(ID: 86036)<\/strong>M\u1ed9t ch\u1ea5t \u0111i\u1ec3m dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a theo ph\u01b0\u01a1ng tr\u00ecnh x = 5sin(2\u03c0t + \u03c0\/3)cm. K\u1ec3 t\u1eeb l\u00fac t = 0, th\u1eddi \u0111i\u1ec3m ch\u1ea5t \u0111i\u1ec3m \u0111i qua v\u1ecb tr\u00ed c\u00f3 li \u0111\u1ed9 x = -2,5cm theo chi\u1ec1u d\u01b0\u01a1ng l\u1ea7n th\u1ee9 2015 l\u00e0<\/p>\n A. 2014,42s B. 2014,75s C. 1007,42s D. 2014,5s<\/p>\n C\u00e2u 8:<\/strong>(ID: 86037)<\/strong>M\u1ed9t con l\u1eafc \u0111\u01a1n g\u1ed3m v\u1eadt nh\u1ecf kh\u1ed1i l\u01b0\u1ee3ng m treo v\u00e0o d\u00e2y d\u00e0i \u2113. T\u1eeb v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng, k\u00e9o con l\u1eafc \u0111\u1ec3 d\u00e2y treo l\u1ec7ch g\u00f3c nh\u1ecf so v\u1edbi ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng r\u1ed3i bu\u00f4ng nh\u1eb9. B\u1ecf qua s\u1ee9c c\u1ea3n kh\u00f4ng kh\u00ed. C\u01a1 n\u0103ng c\u1ee7a con l\u1eafc b\u1eb1ng:<\/p>\n C\u00e2u 9:<\/strong>(ID: 86038)<\/strong>M\u1ed9t \u0111o\u1ea1n m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u g\u1ed3m \u0111i\u1ec7n tr\u1edf R m\u1eafc n\u1ed1i ti\u1ebfp v\u1edbi cu\u1ed9n d\u00e2y thu\u1ea7n c\u1ea3m c\u00f3 \u0111\u1ed9 t\u1ef1 c\u1ea3m L. M\u1eafc hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch tr\u00ean v\u00e0o \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng kh\u00f4ng \u0111\u1ed5i. N\u1ebfu t\u0103ng t\u1ea7n s\u1ed1 c\u1ee7a \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u \u1edf hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch th\u00ec<\/p>\n A.<\/strong>c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n hi\u1ec7u d\u1ee5ng qua m\u1ea1ch s\u1ebd gi\u1ea3m.<\/p>\n B.<\/strong>c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n hi\u1ec7u d\u1ee5ng qua m\u1ea1ch s\u1ebd t\u0103ng.<\/p>\n C.<\/strong>c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n hi\u1ec7u d\u1ee5ng qua m\u1ea1ch s\u1ebd kh\u00f4ng thay \u0111\u1ed5i.<\/p>\n D.<\/strong>s\u1ebd x\u1ea3y ra s\u1ef1 c\u1ed9ng h\u01b0\u1edfng \u0111i\u1ec7n trong \u0111o\u1ea1n m\u1ea1ch.<\/p>\n C\u00e2u 10: (ID: 86039)<\/strong>M\u1ea1ch R,L,C (cu\u1ed9n d\u00e2y thu\u1ea7n c\u1ea3m) cho \u1edf h\u00ecnh v\u1ebd:<\/p>\n C\u00e1c gi\u00e1 tr\u1ecb R,L,f v\u00e0 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng U \u1edf hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch kh\u00f4ng \u0111\u1ed5i, c\u00f2n \u0111i\u1ec7n dung C thay \u0111\u1ed5i \u0111\u01b0\u1ee3c; c\u00e1c v\u00f4n k\u1ebf l\u00ed t\u01b0\u1edfng. Ban \u0111\u1ea7u \u0111i\u1ec7n dung C \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u1edf gi\u00e1 tr\u1ecb th\u00ec:<\/p>\n A.<\/strong>s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n gi\u1ea3m v\u00e0 s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n gi\u1ea3m.<\/p>\n B.<\/strong>s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n t\u0103ng v\u00e0 s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n gi\u1ea3m.<\/p>\n C.<\/strong>s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n gi\u1ea3m v\u00e0 s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n t\u0103ng.<\/p>\n D.<\/strong>s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n t\u0103ng v\u00e0 s\u1ed1 ch\u1ec9 v\u00f4n k\u1ebf V<\/p>\n t\u0103ng.<\/p>\n C\u00e2u 12:<\/strong>(ID: 86041)<\/strong> M\u1ed9t m\u00e1y h\u1ea1 \u00e1p l\u00ed t\u01b0\u1edfng l\u00fac m\u1edbi s\u1ea3n xu\u1ea5t c\u00f3 t\u1ec9 s\u1ed1 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng cu\u1ed9n th\u1ee9 c\u1ea5p v\u00e0 s\u01a1 c\u1ea5p b\u1eb1ng 0,5. Sau m\u1ed9t th\u1eddi gian s\u1eed d\u1ee5ng do l\u1edbp c\u00e1ch \u0111i\u1ec7n k\u00e9m n\u00ean c\u00f3 x v\u00f2ng d\u00e2y c\u1ee7a cu\u1ed9n th\u1ee9 c\u1ea5p b\u1ecb n\u1ed1i t\u1eaft v\u00ec v\u1eady t\u1ec9 s\u1ed1 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng cu\u1ed9n th\u1ee9 c\u1ea5p v\u00e0 s\u01a1 c\u1ea5p ch\u1ec9 c\u00f2n 0,4. \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh x ngu\u1eddi ta cu\u1ed1n th\u00eam v\u00e0o cu\u1ed9n th\u1ee9 c\u1ea5p 36 v\u00f2ng d\u00e2y th\u00ec th\u1ea5y t\u1ec9 s\u1ed1 \u0111i\u1ec7n \u00e1p hi\u1ec7u d\u1ee5ng cu\u1ed9n th\u1ee9 c\u1ea5p v\u00e0 s\u01a1 c\u1ea5p b\u1eb1ng 0,625. Gi\u00e1 tr\u1ecb c\u1ee7a x l\u00e0<\/p>\n A.<\/strong>16 B.<\/strong>20 C.<\/strong>32 D.<\/strong>160<\/p>\n C\u00e2u 13:<\/strong>(ID: 86042)<\/strong>M\u1ed9t con l\u1eafc l\u00f2 xo g\u1ed3m qu\u1ea3 n\u1eb7ng kh\u1ed1i l\u01b0\u1ee3ng m g\u1eafn v\u1edbi l\u00f2 xo nh\u1eb9 \u0111\u1ed9 c\u1ee9ng k dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a v\u1edbi bi\u00ean \u0111\u1ed9 A v\u00e0 t\u1ea7n s\u1ed1 g\u00f3c \u03c9. T\u1ea1i th\u1eddi \u0111i\u1ec3m m\u00e0 th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i c\u1ee7a l\u00f2 xo g\u1ea5p 3 l\u1ea7n \u0111\u1ed9ng n\u0103ng c\u1ee7a q\u1ee7a n\u1eb7ng th\u00ec \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c h\u1ed3i ph\u1ee5c l\u00e0:<\/p>\n \u0110\u00e1p \u00e1n \u0111\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n V\u1eadt L\u00fd n\u0103m 2016- \u0110\u1ec1 s\u1ed1 9<\/strong><\/span><\/p>\n T\u1ea5t c\u1ea3 n\u1ed9i dung b\u00e0i vi\u1ebft. C\u00e1c em h\u00e3y xem th\u00eam v\u00e0 t\u1ea3i file chi ti\u1ebft t\u1ea1i \u0111\u00e2y:<\/strong>Download<\/p>\n","protected":false},"excerpt":{"rendered":" C\u1eadp nh\u1eadt \u0111\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n v\u1eadt l\u00fd n\u0103m 2016 gi\u00fap c\u00e1c em l\u00e0m quen v\u1edbi c\u00e1c d\u1ea1ng b\u00e0i \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 thi THPT Qu\u1ed1c gia s\u1eafp t\u1edbi. Xem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n L\u00fd \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n V\u1eadt L\u00fd n\u0103m 2016 – \u0110\u1ec1 s\u1ed1 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[25],"tags":[],"yoast_head":"\n<\/span>
<\/strong><\/span><\/p>\n<\/strong> C.<\/strong>3U<\/p>\n<\/strong><\/p>\n<\/p>\n<\/p>\n. N\u1ebfu \u0111i\u1ec7n dung C gi\u1ea3m t\u1eeb gi\u00e1 tr\u1ecb C<\/p>\n<\/p>\n<\/p>\n<\/p>\n
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