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{"id":26290,"date":"2018-04-10T16:53:15","date_gmt":"2018-04-10T09:53:15","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=26290"},"modified":"2018-04-10T16:53:15","modified_gmt":"2018-04-10T09:53:15","slug":"bai-tap-trac-nghiem-vat-li-12-giao-thoa-song-phan-1","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-vat-li-12-giao-thoa-song-phan-1\/","title":{"rendered":"B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: Giao thoa s\u00f3ng (ph\u1ea7n 1)"},"content":{"rendered":"

C\u00e2u 1:<\/b>\u00a0Hai s\u00f3ng k\u1ebft h\u1ee3p l\u00e0<\/p>\n

A. hai s\u00f3ng chuy\u1ec3n \u0111\u1ed9ng c\u00f9ng chi\u1ec1u v\u1edbi c\u00f9ng t\u1ed1c \u0111\u1ed9.<\/p>\n

B. hai s\u00f3ng lu\u00f4n \u0111i k\u00e8m v\u1edbi nhau.<\/p>\n

C. hai s\u00f3ng c\u00f3 c\u00f9ng t\u1ea7n s\u1ed1 v\u00e0 c\u00f3 \u0111\u1ed9 l\u1ec7ch pha kh\u00f4ng \u0111\u1ed5i theo th\u1eddi gian.<\/p>\n

D. hai s\u00f3ng c\u00f3 c\u00f9ng b\u01b0\u1edbc song v\u00e0 c\u00f3 \u0111\u1ed9 l\u1ec7ch pha bi\u1ebfn thi\u00ean tu\u1ea7n ho\u00e0n.<\/p>\n

C\u00e2u 2:<\/b>\u00a0Tr\u00ean m\u1eb7t n\u01b0\u1edbc c\u00f3 hai ngu\u1ed3n k\u1ebft h\u1ee3p A v\u00e0 B dao \u0111\u1ed9ng v\u1edbi t\u1ea7n s\u1ed1 30 Hz, ng\u01b0\u1eddi ta th\u1ea5y \u0111\u01b0\u1eddng c\u1ef1c \u0111\u1ea1i th\u1ee9 ba t\u00ednh t\u1eeb \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a AB qua \u0111i\u1ec3m M c\u00f3 hi\u1ec7u kho\u1ea3ng c\u00e1ch t\u1eeb A \u0111\u1ebfn B l\u00e0 15 cm. T\u1ed1c \u0111\u1ed9 truy\u1ec1n s\u00f3ng tr\u00ean m\u1eb7t n\u01b0\u1edbc l\u00e0<\/p>\n

A. 1,5 m\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B. 2,1 m\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C. 2,4 m\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0D. 3,6 m\/s.<\/p>\n

C\u00e2u 3:<\/b>\u00a0Trong m\u1ed9t th\u00ed nghi\u1ec7m v\u1ec1 giao thoa s\u00f3ng tr\u00ean m\u1eb7t n\u01b0\u1edbc, hai ngu\u1ed3n s\u00f3ng k\u1ebft h\u1ee3p A, B dao \u0111\u1ed9ng v\u1edbi t\u1ea7n s\u1ed1 15 Hz v\u00e0 c\u00f9ng pha. T\u1ea1i m\u1ed9t \u0111i\u1ec3m M tr\u00ean m\u1eb7t n\u01b0\u1edbc c\u00e1ch A, B nh\u1eefng kho\u1ea3ng c\u00e1ch t\u1eeb A \u0111\u1ebfn B l\u00e0 15 cm. T\u1ed1c \u0111\u1ed9 truy\u1ec1n s\u00f3ng tr\u00ean m\u1eb7t n\u01b0\u1edbc l\u00e0<\/p>\n

A. 36 cm\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B. 24 cm\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C. 48 cm\/s \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0D. 20 cm\/s.<\/p>\n

C\u00e2u 4:<\/b>\u00a0Trong m\u1ed9t th\u00ed nghi\u1ec7m giao thoa s\u00f3ng tr\u00ean m\u1eb7t n\u01b0\u1edbc, hai ngu\u1ed3n A, B dao \u0111\u1ed9ng c\u00f9ng pha v\u1edbi t\u1ea7n s\u1ed1 f. T\u1ea1i m\u1ed9t \u0111i\u1ec3m tr\u00ean m\u1eb7t n\u01b0\u1edbc c\u00e1ch c\u00e1c ngu\u1ed3n A, B nh\u1eefng kho\u1ea3ng 19 cm, 21 cm s\u00f3ng c\u00f3 bi\u00ean \u0111\u1ed9 c\u1ef1c \u0111\u1ea1i. Gi\u1eefa M v\u00e0 \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a AB kh\u00f4ng c\u00f3 d\u00e3y c\u1ef1c \u0111\u1ea1i n\u00e0o kh\u00e1c. T\u1ed1c \u0111\u1ed9 truy\u1ec1n s\u00f3ng tr\u00ean m\u1eb7t n\u01b0\u1edbc l\u00e0 26 cm\/s. T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng c\u1ee7a hai ngu\u1ed3n l\u00e0<\/p>\n

A. 16 Hz. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B. 26 Hz. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C. 50 Hz. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0D. 13 Hz.<\/p>\n

C\u00e2u 5:<\/b>\u00a0Hai ngu\u1ed3n k\u1ebft h\u1ee3p AB dao \u0111\u1ed9ng c\u00f9ng pha, c\u00f9ng bi\u00ean \u0111\u1ed9. T\u1ea1i m\u1ed9t \u0111i\u1ec3m M c\u00e1ch c\u00e1c ngu\u1ed3n l\u1ea7n l\u01b0\u1ee3t l\u00e0 20 cm v\u00e0 25 cm s\u00f3ng dao \u0111\u1ed9ng v\u1edbi bi\u00ean \u0111\u1ed9 c\u1ef1c \u0111\u1ea1i, gi\u1eefa M v\u00e0 \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111o\u1ea1n AB kh\u00f4ng c\u00f3 \u0111i\u1ec3m c\u1ef1c \u0111\u1ea1i n\u00e0o. T\u1ea1i \u0111i\u1ec3m N c\u00e1c c\u00e1ch ngu\u1ed3n l\u1ea7n l\u01b0\u1ee3t 20 cm v\u00e0 22,5 cm hai s\u00f3ng dao \u0111\u1ed9ng<\/p>\n

A. l\u1ec7ch pha nhau \u03c0\/6. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. c\u00f9ng pha. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. vu\u00f4ng pha. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. ng\u01b0\u1ee3c pha.<\/p>\n

C\u00e2u 6:<\/b>\u00a0Trong m\u1ed9t th\u00ed nghi\u1ec7m giao thoa s\u00f3ng tr\u00ean m\u1eb7t n\u01b0\u1edbc, hai ngu\u1ed3n k\u1ebft h\u1ee3p A v\u00e0 B c\u00e1ch nhau 32 cm, t\u1ea7n s\u1ed1 f = 25 Hz dao \u0111\u1ed9ng \u0111\u1ed3ng pha. Bi\u1ebft t\u1ed1c \u0111\u1ed9 truy\u1ec1n s\u00f3ng l\u00e0 75 cm\/s. S\u1ed1 v\u00e2n giao thoa c\u1ef1c \u0111\u1ea1i v\u00e0 c\u1ef1c ti\u1ec3u quan s\u00e1t \u0111\u01b0\u1ee3c l\u1ea7n l\u01b0\u1ee3t l\u00e0<\/p>\n

A. 18 v\u00e0 17 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B. 20 v\u00e0 21 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C. 21 v\u00e0 22 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0D. 23 v\u00e0 22.<\/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>\n<\/tr>\n
\u0110\u00e1p \u00e1n<\/td>\nC<\/td>\nA<\/td>\nB<\/td>\nD<\/td>\nD<\/td>\nC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e2u 2:<\/b>\u00a0A<\/p>\n

d2<\/sub>-d1<\/sub>=3\u03bb=15 cm \u21d2 \u03bb = 5 cm \u21d2 v = \u03bbf = 1,5 m\/s<\/p>\n

C\u00e2u 3:<\/b>\u00a0B<\/p>\n

Gi\u1eefa M v\u00e0 trung tr\u1ef1c AB c\u00f3 hai d\u00e3y c\u1ef1c \u0111\u1ea1i, m\u00e0 M l\u00e0 c\u1ef1c ti\u1ec3u<\/p>\n

\u21d2 M n\u1eb1m tr\u00ean \u0111\u01b0\u1eddng c\u1ef1c ti\u1ec3u th\u1ee9 3 \u21d2 d2<\/sub>-d1<\/sub>=2,5\u03bb<\/p>\n

\"\"<\/p>\n

C\u00e2u 4:<\/b>\u00a0D<\/p>\n

M l\u00e0 c\u1ef1c \u0111\u1ea1i l\u1edbn nh\u1ea5t : d2<\/sub>-d1<\/sub>=\u03bb=2 cm \u21d2 f=v\/\u03bb=13 Hz<\/p>\n

C\u00e2u 5:<\/b>\u00a0D<\/p>\n

Gi\u1eefa M v\u00e0 \u0111\u01b0\u1eddng trung tr\u1ef1c kh\u00f4ng c\u00f3 v\u00e2n giao thoa c\u1ef1c \u0111\u1ea1i n\u00e0o<\/p>\n

\u21d2 M thu\u1ed9c v\u00e2n giao thoa c\u1ef1c \u0111\u1ea1i th\u1ee9 nh\u1ea5t \u21d2 d2<\/sub>-d1<\/sub>=\u03bb \u21d2 \u03bb = 5 cm<\/p>\n

T\u1ea1i N : d’2<\/sub>-d’1<\/sub>=2,5 cm=\u03bb\/2 \u21d2 t\u1ea1i N, hai s\u00f3ng dao \u0111\u1ed9ng ng\u01b0\u1ee3c pha<\/p>\n

C\u00e2u 6:<\/b>\u00a0C<\/p>\n

\"\"<\/p>\n

C\u00f3 21 gi\u00e1 tr\u1ecb k nguy\u00ean \u1ee9ng v\u1edbi 21 c\u1ef1c \u0111\u1ea1i, 22 gi\u00e1 tr\u1ecb b\u00e1n nguy\u00ean \u1ee9ng v\u1edbi 22 c\u1ef1c ti\u1ec3u.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00e2u 1:\u00a0Hai s\u00f3ng k\u1ebft h\u1ee3p l\u00e0 A. hai s\u00f3ng chuy\u1ec3n \u0111\u1ed9ng c\u00f9ng chi\u1ec1u v\u1edbi c\u00f9ng t\u1ed1c \u0111\u1ed9. B. hai s\u00f3ng lu\u00f4n \u0111i k\u00e8m v\u1edbi nhau. C. hai s\u00f3ng c\u00f3 c\u00f9ng t\u1ea7n s\u1ed1 v\u00e0 c\u00f3 \u0111\u1ed9 l\u1ec7ch pha kh\u00f4ng \u0111\u1ed5i theo th\u1eddi gian. D. hai s\u00f3ng c\u00f3 c\u00f9ng b\u01b0\u1edbc song v\u00e0 c\u00f3 \u0111\u1ed9 l\u1ec7ch pha bi\u1ebfn […]<\/p>\n","protected":false},"author":3,"featured_media":26291,"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: Giao thoa s\u00f3ng (ph\u1ea7n 1)<\/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-giao-thoa-song-phan-1\/\" \/>\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: Giao thoa s\u00f3ng (ph\u1ea7n 1)\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 1:\u00a0Hai s\u00f3ng k\u1ebft h\u1ee3p l\u00e0 A. hai s\u00f3ng chuy\u1ec3n \u0111\u1ed9ng c\u00f9ng chi\u1ec1u v\u1edbi c\u00f9ng t\u1ed1c \u0111\u1ed9. 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