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{"id":26276,"date":"2018-04-10T16:50:13","date_gmt":"2018-04-10T09:50:13","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=26276"},"modified":"2018-04-10T16:50:13","modified_gmt":"2018-04-10T09:50:13","slug":"bai-tap-trac-nghiem-vat-li-12-song-dung","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-vat-li-12-song-dung\/","title":{"rendered":"B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: S\u00f3ng d\u1eebng"},"content":{"rendered":"

C\u00e2u 1:<\/b>\u00a0Hi\u1ec7n t\u01b0\u1ee3ng s\u00f3ng d\u1eebng x\u1ea3y ra khi hai s\u00f3ng g\u1eb7p nhau<\/p>\n

A. c\u00f3 c\u00f9ng bi\u00ean \u0111\u1ed9.<\/p>\n

B. l\u00e0 hai s\u00f3ng truy\u1ec1n c\u00f9ng chi\u1ec1u nhau tr\u00ean m\u1ed9t d\u00e2y \u0111\u00e0n h\u1ed3i.<\/p>\n

C. c\u00f3 c\u00f9ng b\u01b0\u1edbc s\u00f3ng.<\/p>\n

D. l\u00e0 hai s\u00f3ng k\u1ebft h\u1ee3p c\u00f3 c\u00f9ng bi\u00ean \u0111\u1ed9 truy\u1ec1n ng\u01b0\u1ee3c chi\u1ec1u nhau tr\u00ean m\u1ed9t d\u00e2y \u0111\u00e0n h\u1ed3i.<\/p>\n

C\u00e2u 2:<\/b>\u00a0Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u1ea7y sai khi n\u00f3i v\u1ec1 s\u00f3ng ph\u1ea3n xa v\u00e0 s\u00f3ng t\u1edbi t\u1ea1i c\u00e1c \u0111\u1ea7u t\u1ef1 do?<\/p>\n

A. S\u00f3ng ph\u1ea3n x\u1ea1 c\u00f3 c\u00f9ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n v\u1edbi s\u00f3ng t\u1edbi nh\u01b0ng ng\u01b0\u1ee3c h\u01b0\u1edbng.<\/p>\n

B. S\u00f3ng ph\u1ea3n x\u1ea1 c\u00f3 c\u00f9ng t\u1ea7n s\u1ed1 v\u1edbi s\u00f3ng t\u1edbi.<\/p>\n

C. S\u00f3ng ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c pha v\u1edbi s\u00f3ng t\u1edbi.<\/p>\n

D. S\u00f3ng ph\u1ea3n x\u1ea1 c\u00f3 bi\u00ean \u0111\u1ed9 b\u1eb1ng bi\u00ean \u0111\u1ed9 s\u00f3ng t\u1edbi.<\/p>\n

C\u00e2u 3:<\/b>\u00a0Tr\u00ean m\u1ed9t s\u1ee3i d\u00e2y \u0111\u00e0n h\u1ed3i AB d\u00e0i 60 cm \u0111ang c\u00f3 s\u00f3ng d\u1eebng v\u1edbi hai \u0111\u1ea7u A v\u00e0 B c\u1ed1 \u0111\u1ecbnh. Quan s\u00e1t tr\u00ean d\u00e2y AB c\u00f3 3 b\u1ee5ng s\u00f3ng. T\u1ed1c \u0111\u1ed9 truy\u1ec1n s\u00f3ng tr\u00ean d\u00e2y l\u00e0 4 m\/s th\u00ec t\u1ea7n s\u1ed1 s\u00f3ng tr\u00ean d\u00e2y l\u00e0<\/p>\n

A. 15 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B.20 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 10 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 25 Hz.<\/p>\n

C\u00e2u 4:<\/b>\u00a0B\u01b0\u1edbc s\u00f3ng d\u00e0i nh\u1ea5t c\u1ee7a m\u1ed9t s\u00f3ng d\u1eebng c\u00f3 th\u1ec3 t\u1ea1o ra tr\u00ean m\u1ed9t s\u1ee3i d\u00e2y d\u00e0i 15 cm, hai \u0111\u1ea7u c\u1ed1 \u0111\u1ecbnh l\u00e0<\/p>\n

A. 10 cm \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 20 cm \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 30 cm \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 40 cm.<\/p>\n

C\u00e2u 5:<\/b>\u00a0M\u1ed9t d\u00e2y AB d\u00e0i 50 cm c\u00f3 \u0111\u1ea7u B c\u1ed1 \u0111\u1ecbnh. T\u1ea1i \u0111\u1ea7u A th\u1ef1c hi\u1ec7n m\u1ed9t dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a c\u00f3 t\u1ea7n s\u1ed1 f = 100 Hz. T\u1ed1c \u0111\u1ed9 truy\u1ec1n s\u00f3ng tr\u00ean d\u00e2y l\u00e0 v = 10 m\/s. S\u1ed1 \u0111i\u1ec3m n\u00fat, s\u1ed1 \u0111i\u1ec3m b\u1ee5ng tr\u00ean d\u00e2y (kh\u00f4ng k\u1ec3 hai \u0111\u1ea7u d\u00e2y) l\u00e0<\/p>\n

A. 9 n\u00fat; 10 b\u1ee5ng \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 10 n\u00fat; 11 b\u1ee5ng<\/p>\n

C. 6 n\u00fat; 7 b\u1ee5ng \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 6 n\u00fat; 5 b\u1ee5ng.<\/p>\n

C\u00e2u 6:<\/b>\u00a0M\u1ed9t s\u1ee3i d\u00e2y \u0111\u00e0n h\u1ed3i, m\u1ed9t \u0111\u1ea7u n\u1ed1i v\u1edbi v\u1eadt c\u1ea3n, \u0111\u1ea7u kia ki\u00ean k\u1ebft v\u1edbi m\u1ed9t b\u00e0n rung c\u00f3 t\u1ea7n s\u1ed1 rung l\u00e0 440 Hz. Khi \u0111\u00f3 xu\u1ea5t hi\u1ec7n s\u00f3ng d\u1eebng tr\u00ean d\u00e2y. T\u1ed1c \u0111\u1ed9 truy\u1ec1n s\u00f3ng tr\u00ean d\u00e2y l\u00e0 132 m\/s. Ng\u01b0\u1eddi ta \u0111\u1ebfm \u0111\u01b0\u1ee3c 6 b\u1ee5ng s\u00f3ng xu\u1ea5t hi\u1ec7n d\u1ecdc s\u01a1i d\u00e2y. Chi\u1ec1u d\u00e0i s\u1ee3i d\u00e2y l\u00e0<\/p>\n

A. 0,08 m \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 1,20 m \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 0,96 m \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 0,90 m.<\/p>\n

C\u00e2u 7:<\/b>\u00a0Trong th\u00ed nghi\u1ec7m v\u1ec1 s\u00f3ng d\u1eebng, tr\u00ean m\u1ed9t s\u1ee3i d\u00e2y \u0111\u00e0n h\u1ed3i d\u00e0i 1,5 m v\u1edbi hai \u0111\u1ea7u c\u1ed1 \u0111\u1ecbnh, ng\u01b0\u1eddi ta quan sat th\u1ea5y ngo\u00e0i hai \u0111\u1ea7u d\u00e2y c\u1ed1 \u0111\u1ecbnh c\u00f2n c\u00f3 ba \u0111i\u1ec3m kh\u00e1c tr\u00ean d\u00e2y kh\u00f4ng dao \u0111\u1ed9ng. Bi\u1ebft kho\u1ea3ng th\u1eddi gian gi\u1eefa hai l\u1ea7n li\u00ean ti\u1ebfp s\u1ee3i d\u00e2y du\u1ed7i th\u1eb3ng l\u00e0 0,05 s. T\u1ed1c \u0111\u1ed9 truy\u1ec1n s\u00f3ng tr\u00ean d\u00e2y l\u00e0<\/p>\n

A. 3,75 m\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 5 m\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 30 m\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 7,5 m\/s.<\/p>\n

C\u00e2u 8:<\/b>\u00a0M\u1ed9t s\u1ee3i d\u00e2y AB d\u00e0i 100 cm c\u0103ng ngang, \u0111\u1ea7u B c\u1ed1 \u0111\u1ecbnh, \u0111\u1ea7u A g\u1eafn v\u1edbi m\u1ed9t ngu\u1ed3n dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a c\u00f3 t\u1ea7n s\u1ed1 thay \u0111\u1ed5i \u0111\u01b0\u1ee3c. Bi\u1ebft t\u1ed1c \u0111\u1ed9 truy\u1ec1n s\u00f3ng tr\u00ean d\u00e2y l\u00e0 20 cm\/s. Khi c\u00f3 s\u00f3ng d\u1eebng tr\u00ean d\u00e2y th\u00ec \u0111\u1ea7u A coi l\u00e0 n\u00fat. Khi t\u1ea7n s\u1ed1 c\u1ee7a ngu\u1ed3n thay \u0111\u1ed5i t\u1eeb 45 Hz \u0111\u1ebfn 100 Hz th\u00ec s\u1ed1 l\u1ea7n t\u1ed1i \u0111a ta quan s\u00e1t \u0111\u01b0\u1ee3c s\u00f3ng d\u1eebng tr\u00ean d\u00e2y l\u00e0<\/p>\n

A. 6 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 8 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 7 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 5.<\/p>\n

C\u00e2u 9:<\/b>\u00a0M\u1ed9t s\u1ee3i d\u00e2y c\u0103ng gi\u1eefa hai \u0111i\u1ec3m c\u1ed1 \u0111\u1ecbnh c\u00e1ch nhau 75 cm. Ng\u01b0\u1eddi ta t\u1ea1o s\u00f3ng d\u1eebng tr\u00ean d\u00e2y. Hai t\u1ea7n s\u1ed1 g\u1ea7n nhau nh\u1ea5t c\u00f9ng t\u1ea1o ra s\u00f3ng d\u1eebng tr\u00ean d\u00e2y l\u00e0 150 Hz v\u00e0 200 Hz. T\u1ea7n s\u1ed1 nh\u1ecf nh\u1ea5t t\u1ea1o ra s\u00f3ng d\u1eebng tr\u00ean d\u00e2y \u0111\u00f3 l\u00e0<\/p>\n

A. 75 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 125 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 50 Hz \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 100 Hz.<\/p>\n

C\u00e2u 10:<\/b>\u00a0M\u1ed9t s\u1ee3i d\u00e2y c\u0103ng gi\u1eefa hai \u0111i\u1ec3m c\u1ed1 \u0111\u1ecbnh c\u00e1ch nhau 75 cm. Hai s\u00f3ng c\u00f3 t\u1ea7n s\u1ed1 g\u1ea7n nhau li\u00ean ti\u1ebfp c\u00f9ng t\u1ea1o ra s\u00f3ng d\u1eebng tr\u00ean d\u00e2y l\u00e0 15 Hz v\u00e0 20 Hz. Bi\u1ebft t\u1ed1c \u0111\u1ed9 truy\u1ec1n c\u1ee7a c\u00e1c s\u00f3ng tr\u00ean day \u0111\u1ec1u b\u1eb1ng nhau. T\u1ed1c \u0111\u1ed9 truy\u1ec1n s\u00f3ng tr\u00ean d\u00e2y l\u00e0<\/p>\n

A. 1,5 m\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 5 m\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 7,5 m\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 15 m\/s.<\/p>\n

H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0111\u00e1p \u00e1n<\/b><\/p>\n\n\n\n\n
C\u00e2u<\/td>\n1<\/td>\n2<\/td>\n3<\/td>\n4<\/td>\n5<\/td>\n6<\/td>\n7<\/td>\n8<\/td>\n9<\/td>\n10<\/td>\n<\/tr>\n
\u0110\u00e1p \u00e1n<\/td>\nD<\/td>\nC<\/td>\nC<\/td>\nC<\/td>\nA<\/td>\nD<\/td>\nB<\/td>\nA<\/td>\nC<\/td>\nC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e2u 3:<\/b>\u00a0C<\/p>\n

\"\"<\/p>\n

C\u00e2u 4:<\/b>\u00a0C<\/p>\n

B\u01b0\u1edbc s\u00f3ng d\u00e0i nh\u1ea5t khi tr\u00ean d\u00e2y AB = 15 cm ch\u1ec9 c\u00f3 1 b\u1ee5ng s\u00f3ng<\/p>\n

Theo \u0111\u1ec1 b\u00e0i : \u03bb\/2=15 cm \u21d2 \u03bb = 30 cm<\/p>\n

C\u00e2u 5:<\/b>\u00a0A<\/p>\n

\"\"<\/p>\n

C\u00e2u 6:<\/b>\u00a0D<\/p>\n

\"\"<\/p>\n

C\u00e2u 7:<\/b>\u00a0B<\/p>\n

\"\"<\/p>\n

C\u00e2u 8:<\/b>\u00a0A<\/p>\n

\"\"<\/p>\n

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

\"\"<\/p>\n

C\u00e2u 10:<\/b>\u00a0C<\/p>\n

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

C\u00e2u 1:\u00a0Hi\u1ec7n t\u01b0\u1ee3ng s\u00f3ng d\u1eebng x\u1ea3y ra khi hai s\u00f3ng g\u1eb7p nhau A. c\u00f3 c\u00f9ng bi\u00ean \u0111\u1ed9. B. l\u00e0 hai s\u00f3ng truy\u1ec1n c\u00f9ng chi\u1ec1u nhau tr\u00ean m\u1ed9t d\u00e2y \u0111\u00e0n h\u1ed3i. C. c\u00f3 c\u00f9ng b\u01b0\u1edbc s\u00f3ng. D. l\u00e0 hai s\u00f3ng k\u1ebft h\u1ee3p c\u00f3 c\u00f9ng bi\u00ean \u0111\u1ed9 truy\u1ec1n ng\u01b0\u1ee3c chi\u1ec1u nhau tr\u00ean m\u1ed9t d\u00e2y \u0111\u00e0n h\u1ed3i. C\u00e2u […]<\/p>\n","protected":false},"author":3,"featured_media":26277,"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: S\u00f3ng d\u1eebng<\/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-song-dung\/\" \/>\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: S\u00f3ng d\u1eebng\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 1:\u00a0Hi\u1ec7n t\u01b0\u1ee3ng s\u00f3ng d\u1eebng x\u1ea3y ra khi hai s\u00f3ng g\u1eb7p nhau A. c\u00f3 c\u00f9ng bi\u00ean \u0111\u1ed9. B. l\u00e0 hai s\u00f3ng truy\u1ec1n c\u00f9ng chi\u1ec1u nhau tr\u00ean m\u1ed9t d\u00e2y \u0111\u00e0n h\u1ed3i. C. c\u00f3 c\u00f9ng b\u01b0\u1edbc s\u00f3ng. D. l\u00e0 hai s\u00f3ng k\u1ebft h\u1ee3p c\u00f3 c\u00f9ng bi\u00ean \u0111\u1ed9 truy\u1ec1n ng\u01b0\u1ee3c chi\u1ec1u nhau tr\u00ean m\u1ed9t d\u00e2y \u0111\u00e0n h\u1ed3i. 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