<\/div>\n
A. t\u1ea7n s\u1ed1 kh\u00e1c nhau.<\/p>\n
B. c\u01b0\u1eddng\u00a0 kh\u00e1c nhau.<\/p>\n
C. \u0111\u1ed9 cao v\u00e0 \u0111\u1ed9 to kh\u00e1c nhau.<\/p>\n
D. s\u1ed1 l\u01b0\u1ee3ng v\u00e0 t\u1ec9 l\u1ec7 c\u01b0\u1eddng \u0111\u1ed9 c\u00e1c h\u1ecda \u00e2m kh\u00e1c nhau.<\/p>\n
C\u00e2u 3:<\/b>\u00a0T\u00ecm c\u00e2u tr\u1ea3 l\u1eddi kh\u00f4ng \u0111\u00fang trong c\u00e1c c\u00e2u sau<\/p>\n
A. \u0110\u1ed1i v\u1edbi tai con ng\u01b0\u1eddi, c\u01b0\u1eddng \u0111\u1ed9 \u00e2m c\u00e0ng l\u1edbn th\u00ec c\u1ea3m gi\u00e1c \u00e2m c\u00e0ng to.<\/p>\n
B. \u0110\u1ed9 to c\u1ee7a \u00e2m t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 \u00e2m.<\/p>\n
C. Tai con ng\u01b0\u1eddi nghe \u00e2m cao c\u1ea3m gi\u00e1c \u201cto\u201d h\u01a1n nghe \u00e2m tr\u1ea7m khi ch\u00fang c\u00f3 c\u00f9ng c\u01b0\u1eddng \u0111\u1ed9.<\/p>\n
D. Ng\u01b0\u1ee1ng nghe th\u1ea5y thay \u0111\u1ed5i t\u00f9y theo t\u1ea7n s\u1ed1 \u00e2m.<\/p>\n
C\u00e2u 4:<\/b>\u00a0Tai ta c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c \u00e2m thanh kh\u00e1c bi\u1ec7t c\u1ee7a c\u00e1c n\u1ed1t nh\u1ea1c \u0110\u00f4, R\u00ea, Mi, Fa, Son, La, Si khi ch\u00fang ph\u00e1t ra t\u1eeb m\u1ed9t nh\u1ea1c c\u1ee5 nh\u1ea5t \u0111\u1ecbnh l\u00e0 do c\u00e1c \u00e2m thanh n\u00e0y c\u00f3<\/p>\n
A. \u00e2m s\u1eafc kh\u00e1c nhau.<\/p>\n
B. t\u1ea7n s\u1ed1 \u00e2m kh\u00e1c nhau.<\/p>\n
C. bi\u00ean \u0111\u1ed9 \u00e2m kh\u00e1c nhau.<\/p>\n
D. c\u01b0\u1eddng \u0111\u1ed9 \u00e2m kh\u00e1c nhau.<\/p>\n
C\u00e2u 5:<\/b>\u00a0\u0110\u1ec3 so s\u00e1nh s\u1ef1 v\u1ed7 c\u00e1nh nhanh hay ch\u1eadm c\u1ee7a m\u1ed9t con ong v\u1edbi m\u1ed9t con mu\u1ed7i, ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o \u0111\u1eb7c t\u00ednh sinh l\u00ed n\u00e0o c\u1ee7a \u00e2m do c\u00e1nh c\u1ee7a ch\u00fang ph\u00e1t ra<\/p>\n
A. \u0110\u1ed9 cao \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. \u0110\u1ed9 to \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. C\u01b0\u1eddng \u0111\u1ed9 \u00e2m \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. \u00c2m s\u1eafc<\/p>\n
C\u00e2u 6:<\/b>\u00a0C\u00f3 hai ngu\u1ed3n s\u00f3ng \u00e2m k\u1ebft h\u1ee3p \u0111\u1eb7t c\u00e1ch nhau m\u1ed9t kho\u1ea3ng 5 m dao \u0111\u1ed9ng ng\u01b0\u1ee3c pha nhau. Trong kho\u1ea3ng gi\u1eefa hai ngu\u1ed3n \u00e2m, ng\u01b0\u1eddi ta th\u1ea5y 9 v\u1ecb tr\u00ed \u00e2m c\u00f3 \u0111\u1ed9 to c\u1ef1c ti\u1ec3u. Bi\u1ebft t\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m trong kh\u00f4ng kh\u00ed l\u00e0 340 m\/s. T\u1ea7n s\u1ed1 f c\u1ee7a \u00e2m c\u00f3 gi\u00e1 tr\u1ecb th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n n\u00e0o n\u00eau d\u01b0\u1edbi \u0111\u00e2y?<\/p>\n
A. 272 Hz < f < 350 Hz. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 136 Hz < f < 530 Hz.<\/p>\n
C. 86 Hz < f < 350 Hz. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 125 Hz < f < 195 Hz.<\/p>\n
C\u00e2u 7:<\/b>\u00a0Hai ngu\u1ed3n \u00e2m gi\u1ed1ng nhau \u0111\u1ec1u coi l\u00e0 ngu\u1ed3n \u0111i\u1ec3m \u0111\u1eb7t c\u00e1ch nhau m\u1ed9t kho\u1ea3ng n\u00e0o \u0111\u00f3. Ch\u00fang ph\u00e1t ra \u00e2m c\u00f3 t\u1ea7n s\u1ed1 f = 2200 Hz. T\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m b\u1eb1ng 330 m\/s. Tr\u00ean \u0111\u01b0\u1eddng th\u1eb3ng n\u1ed1i gi\u1eefa hai ngu\u1ed3n, hai \u0111i\u1ec3m m\u00e0 \u00e2m nghe \u0111\u01b0\u1ee3c to nh\u1ea5t v\u00e0 g\u1ea7n nhau nh\u1ea5t c\u00e1ch nhau l\u00e0<\/p>\n
A. 2,5 cm \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. 4,5 cm \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. 7,5 cm \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. 1,5 cm.<\/p>\n
C\u00e2u 8:<\/b>\u00a0T\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m ph\u1ee5 thu\u1ed9c v\u00e0o<\/p>\n
A. c\u01b0\u1eddng \u0111\u1ed9 \u00e2m \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. \u0111\u1ed9 to c\u1ee7a \u00e2m<\/p>\n
C. m\u00f4i tr\u01b0\u1eddng truy\u1ec1n \u00e2m \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. \u00e2m s\u1eafc<\/p>\n
C\u00e2u 9:<\/b>\u00a0\u0110\u1ed9 to c\u1ee7a \u00e2m cho bi\u1ebft<\/p>\n
A. t\u1ea7n s\u1ed1 \u00e2m thanh l\u1edbn h\u01a1n bao nhi\u00eau l\u1ea7n so v\u1edbi m\u1ed9t t\u1ea7n s\u1ed1 chu\u1ea9n n\u00e0o \u0111\u00f3.<\/p>\n
B. t\u1ea7n s\u1ed1 \u00e2m thanh l\u1edbn h\u01a1n bao nhi\u00eau l\u1ea7n so v\u1edbi m\u1ed9t c\u01b0\u1eddng \u0111\u1ed9 chu\u1ea9n n\u00e0o \u0111\u00f3.<\/p>\n
C. t\u1ea7n s\u1ed1 \u00e2m thanh l\u1edbn h\u01a1n bao nhi\u00eau l\u1ea7n so v\u1edbi m\u1ed9t t\u1ed1c \u0111\u1ed9 chu\u1ea9n n\u00e0o \u0111\u00f3.<\/p>\n
D. b\u01b0\u1edbc s\u00f3ng \u00e2m thanh l\u1edbn h\u01a1n bao nhi\u00eau l\u1ea7n so v\u1edbi m\u1ed9t b\u01b0\u1edbc s\u00f3ng chu\u1ea9n n\u00e0o \u0111\u00f3.<\/p>\n
H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0111\u00e1p \u00e1n<\/b><\/p>\n\n\n\n| C\u00e2u<\/td>\n | 1<\/td>\n | 2<\/td>\n | 3<\/td>\n | 4<\/td>\n | 5<\/td>\n | 6<\/td>\n | 7<\/td>\n | 8<\/td>\n | 9<\/td>\n<\/tr>\n |
\n| \u0110\u00e1p \u00e1n<\/td>\n | C<\/td>\n | D<\/td>\n | B<\/td>\n | B<\/td>\n | A<\/td>\n | A<\/td>\n | C<\/td>\n | C<\/td>\n | B<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n C\u00e2u 6:<\/b>\u00a0A<\/p>\n Kho\u1ea3ng c\u00e1c gi\u1eefa hai \u0111i\u1ec3m li\u00ean ti\u1ebfp nghe \u0111\u01b0\u1ee3c \u00e2m c\u1ef1c \u0111\u1ea1i b\u1eb1ng n\u1eeda b\u01b0\u1edbc s\u00f3ng.<\/p>\n \u0110i\u1ec3m gi\u1eefa hai ngu\u1ed3n c\u00f3 c\u1ef1c ti\u1ec3u giao thoa<\/p>\n ![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/1-151.png\") <\/p>\n
C\u00e2u 7:<\/b>\u00a0C<\/p>\n ![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/2-61.png\") <\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":" C\u00e2u 1:\u00a0Hai nh\u1ea1c c\u1ee5 c\u00f9ng ph\u00e1t ra m\u1ed9t \u00e2m c\u01a1 b\u1ea3n nh\u01b0ng c\u00f3 s\u1ed1 c\u00e1c h\u1ecda \u00e2m v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a c\u00e1c h\u1ecda \u00e2m kh\u00e1c nhau th\u00ec c\u00e1c \u00e2m t\u1ed5ng h\u1ee3p kh\u00f4ng th\u1ec3 gi\u1ed1ng nhau v\u1ec1 A. \u0111\u1ed9 to \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. c\u01b0\u1eddng \u0111\u1ed9 \u00e2m \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. \u00e2m s\u1eafc \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. m\u1ee9c c\u01b0\u1eddng \u0111\u1ed9 \u00e2m. C\u00e2u […]<\/p>\n","protected":false},"author":3,"featured_media":26260,"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":"\n B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m V\u1eadt L\u00ed 12: \u0110\u1eb7c tr\u01b0ng sinh l\u00ed c\u1ee7a \u00e2m<\/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-dac-trung-sinh-li-cua-am\/\" \/>\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: \u0110\u1eb7c tr\u01b0ng sinh l\u00ed c\u1ee7a \u00e2m\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 1:\u00a0Hai nh\u1ea1c c\u1ee5 c\u00f9ng ph\u00e1t ra m\u1ed9t \u00e2m c\u01a1 b\u1ea3n nh\u01b0ng c\u00f3 s\u1ed1 c\u00e1c h\u1ecda \u00e2m v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a c\u00e1c h\u1ecda \u00e2m kh\u00e1c nhau th\u00ec c\u00e1c \u00e2m t\u1ed5ng h\u1ee3p kh\u00f4ng th\u1ec3 gi\u1ed1ng nhau v\u1ec1 A. \u0111\u1ed9 to \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B. c\u01b0\u1eddng \u0111\u1ed9 \u00e2m \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C. \u00e2m s\u1eafc \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D. m\u1ee9c c\u01b0\u1eddng \u0111\u1ed9 \u00e2m. 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