{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"\u1ede Vi\u00ea\u0323t Nam c\u00e1c m\u00e1y ph\u00e1t \u0111i\u1ec7n trong l\u01b0\u1edbi \u0111i\u1ec7n qu\u1ed1c gia c\u00f3 t\u1ea7n s\u1ed1 ","select":["A. 25Hz.","B. 50Hz.","C. 75Hz.","D. 100Hz."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3291},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"B\u1ed9 ph\u1eadn ch\u00ednh c\u1ee7a b\u1ed9 g\u00f3p \u0111i\u1ec7n trong m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u g\u1ed3m: ","select":["A. hai b\u00e1n khuy\u00ean v\u00e0 hai ch\u1ed5i qu\u00e9t.","B. hai v\u00e0nh khuy\u00ean v\u00e0 hai ch\u1ed5i qu\u00e9t.","C. ch\u1ec9 c\u00f3 hai v\u00e0nh khuy\u00ean.","D. m\u1ed9t b\u00e1n khuy\u00ean, m\u1ed9t v\u00e0nh khuy\u00ean v\u00e0 hai ch\u1ed5i qu\u00e9t."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3292},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"N\u1ed1i hai c\u1ef1c c\u1ee7a m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u v\u1edbi m\u1ed9t b\u00f3ng \u0111\u00e8n. Khi quay nam ch\u00e2m c\u1ee7a m\u00e1y ph\u00e1t th\u00ec trong cu\u1ed9n d\u00e2y c\u1ee7a n\u00f3 xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u v\u00ec: ","select":["A. t\u1eeb tr\u01b0\u1eddng trong l\u00f2ng cu\u1ed9n d\u00e2y lu\u00f4n t\u0103ng.","B. s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y lu\u00f4n t\u0103ng.","C. t\u1eeb tr\u01b0\u1eddng trong l\u00f2ng cu\u1ed9n d\u00e2y kh\u00f4ng bi\u1ebfn \u0111\u1ed5i.","D. s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y lu\u00e2n phi\u00ean t\u0103ng gi\u1ea3m."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3293},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Trong c\u00e1c m\u00e1y ph\u00e1t \u0111i\u1ec7n l\u1edbn d\u00f9ng trong c\u00f4ng nghi\u1ec7p, \u0111\u1ec3 t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng m\u1ea1nh ng\u01b0\u1eddi ta th\u01b0\u1eddng d\u00f9ng ","select":["A. Nam ch\u00e2m v\u0129nh c\u1eedu.","B. Nam ch\u00e2m \u0111i\u1ec7n.","C. Kim nam ch\u00e2m.","D. Nam ch\u00e2m ch\u1eef U"],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3294},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" M\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u b\u1eaft bu\u1ed9c ph\u1ea3i g\u1ed3m c\u00e1c b\u1ed9 ph\u1eadn ch\u00ednh n\u00e0o \u0111\u1ec3 c\u00f3 th\u1ec3 t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n?","select":["A. Nam ch\u00e2m v\u0129nh c\u1eedu v\u00e0 s\u1ee3i d\u00e2y d\u1eabn n\u1ed1i hai c\u1ef1c nam ch\u00e2m. ","B. Nam ch\u00e2m \u0111i\u1ec7n v\u00e0 s\u1ee3i d\u00e2y d\u1eabn n\u1ed1i nam ch\u00e2m v\u1edbi \u0111\u00e8n. ","C. Cu\u1ed9n d\u00e2y d\u1eabn v\u00e0 nam ch\u00e2m.","D. Cu\u1ed9n d\u00e2y d\u1eabn v\u00e0 l\u00f5i s\u1eaft."],"hint":"","explain":"<span class='basic_left'>M\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u b\u1eaft bu\u1ed9c ph\u1ea3i g\u1ed3m c\u00e1c b\u1ed9 ph\u1eadn ch\u00ednh \u0111\u1ec3 c\u00f3 th\u1ec3 t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n: Cu\u1ed9n d\u00e2y d\u1eabn v\u00e0 nam ch\u00e2m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3295},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"N\u1ed1i hai c\u1ef1c c\u1ee7a m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u v\u1edbi m\u1ed9t b\u00f3ng \u0111\u00e8n. Khi quay nam ch\u00e2m c\u1ee7a m\u00e1y ph\u00e1t th\u00ec trong cu\u1ed9n d\u00e2y c\u1ee7a n\u00f3 xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng xoay chi\u1ec1u v\u00ec: ","select":["A. T\u1eeb tr\u01b0\u1eddng trong l\u00f2ng cu\u1ed9n d\u00e2y lu\u00f4n t\u0103ng.","B. S\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y d\u1eabn lu\u00f4n t\u0103ng.","C. T\u1eeb tr\u01b0\u1eddng trong l\u00f2ng cu\u1ed9n d\u00e2y kh\u00f4ng bi\u1ebfn \u0111\u1ed5i","D. S\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y lu\u00e2n phi\u00ean t\u0103ng gi\u1ea3m."],"hint":"","explain":"<span class='basic_left'>N\u1ed1i hai c\u1ef1c c\u1ee7a m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u v\u1edbi m\u1ed9t b\u00f3ng \u0111\u00e8n. Khi quay nam ch\u00e2m c\u1ee7a m\u00e1y ph\u00e1t th\u00ec trong cu\u1ed9n d\u00e2y c\u1ee7a n\u00f3 xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng xoay chi\u1ec1u v\u00ec: s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y lu\u00e2n phi\u00ean t\u0103ng gi\u1ea3m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3296},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Trong m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u, r\u00f4to ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o khi m\u00e1y l\u00e0m vi\u1ec7c? ","select":["A. Lu\u00f4n \u0111\u1ee9ng y\u00ean.","B. Chuy\u1ec3n \u0111\u1ed9ng \u0111i l\u1ea1i nh\u01b0 con thoi.","C. Lu\u00f4n quay tr\u00f2n quanh m\u1ed9t tr\u1ee5c theo m\u1ed9t chi\u1ec1u.","D. Lu\u00e2n phi\u00ean \u0111\u1ed5i chi\u1ec1u quay."],"hint":"","explain":"<span class='basic_left'>Trong m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u, r\u00f4to ho\u1ea1t \u0111\u1ed9ng Lu\u00f4n quay tr\u00f2n quanh m\u1ed9t tr\u1ee5c theo m\u1ed9t chi\u1ec1u khi m\u00e1y l\u00e0m vi\u1ec7c<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3297},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"M\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u bi\u1ebfn \u0111\u1ed5i: ","select":["A. C\u01a1 n\u0103ng th\u00e0nh \u0111i\u1ec7n n\u0103ng","B. \u0110i\u1ec7n n\u0103ng th\u00e0nh c\u01a1 n\u0103ng","C. C\u01a1 n\u0103ng th\u00e0nh nhi\u1ec7t n\u0103ng","D. Nhi\u1ec7t n\u0103ng th\u00e0nh c\u01a1 n\u0103ng"],"hint":"","explain":"<span class='basic_left'>M\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u bi\u1ebfn \u0111\u1ed5i: C\u01a1 n\u0103ng th\u00e0nh \u0111i\u1ec7n n\u0103ng v\u00ec Khi cho nam ch\u00e2m (ho\u1eb7c cu\u1ed9n d\u00e2y) quay th\u00ec ta l\u1ea1i thu \u0111\u01b0\u1ee3c d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u trong c\u00e1c m\u00e1y tr\u00ean khi n\u1ed1i hai c\u1ef1c c\u1ee7a m\u00e1y v\u1edbi c\u00e1c d\u1ee5ng c\u1ee5 ti\u00eau th\u1ee5 \u0111i\u1ec7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3298},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Trong m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u roto l\u00e0 nam ch\u00e2m,khi m\u00e1y ho\u1ea1t \u0111\u1ed9ng th\u00ec nam ch\u00e2m c\u00f3 t\u00e1c d\u1ee5ng g\u00ec? ","select":["A. T\u1ea1o ra t\u1eeb tr\u01b0\u1eddng","B. L\u00e0m cho s\u1ed1 \u0111\u01b0\u1edbng s\u1ee9c t\u1eeb qua ti\u1ebft di\u00ean cu\u1ed9n d\u00e2y t\u0103ng","C. L\u00e0m cho s\u1ed1 \u0111\u01b0\u1edbng s\u1ee9c t\u1eeb qua ti\u1ebft di\u00ean cu\u1ed9n d\u00e2y gi\u1ea3m","D. L\u00e0m cho s\u1ed1 \u0111\u01b0\u1edbng s\u1ee9c t\u1eeb qua ti\u1ebft di\u00ean cu\u1ed9n d\u00e2y bi\u1ebfn thi\u00ean"],"hint":"","explain":"<span class='basic_left'>Trong m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u roto l\u00e0 nam ch\u00e2m, khi m\u00e1y ho\u1ea1t \u0111\u1ed9ng th\u00ec nam ch\u00e2m c\u00f3 t\u00e1c d\u1ee5ng: L\u00e0m cho s\u1ed1 \u0111\u01b0\u1edbng s\u1ee9c t\u1eeb qua ti\u1ebft di\u00ean cu\u1ed9n d\u00e2y bi\u1ebfn thi\u00ean<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3299},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"M\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u g\u1ed3m m\u1ea5y b\u1ed9 ph\u1eadn ch\u00ednh ","select":["A.1","B.2","C.3","D.4"],"hint":"","explain":"<span class='basic_left'>M\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u g\u1ed3m 2 b\u1ed9 ph\u1eadn ch\u00ednh l\u00e0: nam ch\u00e2m v\u00e0 cu\u1ed9n d\u00e2y d\u1eabn.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3300},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"C\u00f3 m\u1ea5y lo\u1ea1i m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u ","select":["A.1","B.2","C.3","D.4"],"hint":"","explain":"<span class='basic_left'>C\u00f3 hai lo\u1ea1i m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u : <br\/> * Lo\u1ea1i 1 : Khung d\u00e2y quay ( R\u00f4to ) th\u00ec c\u00f3 th\u00eam b\u1ed9 g\u00f3p ( hai v\u00e0nh khuy\u00ean n\u1ed1i v\u1edbi hai \u0111\u1ea7u d\u00e2y , hai v\u00e0nh khuy\u00ean t\u1eeb l\u00ean ha thanh qu\u1ebft , khi khung d\u00e2y quay th\u00ec v\u00e0nh khuy\u00ean quay c\u00f2n thanh qu\u00e9t \u0111\u1ee9ng y\u00ean ) . Lo\u1ea1i n\u00e0y ch\u1ec9 kh\u00e1c \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n m\u1ed9t chi\u1ec1u \u1edf b\u1ed9g\u00f3p ( c\u1ed5 g\u00f3p ) . \u1ede m\u00e1y ph\u00e1t \u0111i\u1ec7n m\u1ed9t chi\u1ec1u l\u00e0 hai b\u00e1n khuy\u00ean t\u00ec l\u00ean hai thanh qu\u00e9t . <br\/> + Lo\u1ea1i 2 : Nam ch\u00e2m quay ( nam ch\u00e2m n\u00e0y l\u00e0 nam ch\u00e2m \u0111i\u1ec7n ) : Roto <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3301},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Ch\u1ecdn ph\u00e1t bi\u1ec3u \u0111\u00fang: ","select":["A . B\u1ed9 ph\u1eadn \u0111\u1ee9ng y\u00ean g\u1ecdi l\u00e0 roto ","B . B\u1ed9 ph\u1eadn quay g\u1ecdi l\u00e0 stato ","C . C\u00f3 hai lo\u1ea1i m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u ","D . M\u00e1y ph\u00e1t \u0111i\u1ec7n quay c\u00e0ng nhanh th\u00ec hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf hai \u0111\u1ea7u cu\u1ed9n d\u00e2y c\u1ee7a m\u00e1y c\u00e0ng nh\u1ecf"],"hint":"","explain":"<span class='basic_left'>A sai v\u00ec : B\u1ed9 ph\u1eadn \u0111\u1ee9ng y\u00ean g\u1ecdi l\u00e0 stato <br\/>B sai v\u00ec : B\u1ed9 ph\u1eadn quay g\u1ecdi l\u00e0 roto <br\/>C \u0111\u00fang <br\/>D sai v\u00ec : M\u00e1y ph\u00e1t \u0111i\u1ec7n quay c\u00e0ng nhanh th\u00ec hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u1edf 2 \u0111\u1ea7u cu\u1ed9n d\u00e2y c\u1ee7a m\u00e1y c\u00e0ng l\u1edbn <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3302},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Ch\u1ecdn ph\u00e1t bi\u1ec3u \u0111\u00fang khi so s\u00e1nh gi\u1eefa \u0111inam\u00f4 \u1edf xe \u0111\u1ea1p v\u00e0 m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u trong c\u00f4ng nghi\u1ec7p ","select":["A . C\u1ea3 hai \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7n t\u01b0\u1ee3ng c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb ","B . Ph\u1ea7n quay l\u00e0 cu\u1ed9n d\u00e2y t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n ","C . Ph\u1ea7n \u0111\u1ee9ng y\u00ean l\u00e0 nam ch\u00e2m t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng ","D . \u0110inam\u00f4 d\u00f9ng nam ch\u00e2m \u0111i\u1ec7n , m\u00e1y ph\u00e1t \u0111i\u1ec7n c\u00f4ng nghi\u1ec7p d\u00f9ng nam ch\u00e2m v\u0129nh c\u1eedu"],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3303},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Ch\u1ecdn ph\u00e1t bi\u1ec3u sai: ","select":["A . B\u1ed9 ph\u1eadn \u0111\u1ee9ng y\u00ean g\u1ecdi l\u00e0 stato , b\u1ed9 ph\u1eadn quay g\u1ecdi l\u00e0 roto","B . Khi roto c\u1ee7a m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u quay \u0111\u01b0\u1ee3c 1 v\u00f2ng th\u00ec d\u00f2ng \u0111i\u1ec7n do m\u00e1y sinh ra \u0111\u1ed1i chi\u1ebfu 1 l\u1ea7n","C . D\u00f2ng \u0111i\u1ec7n kh\u00f4ng thay \u0111\u1ed5i khi \u0111\u1ed1i chi\u1ec1u quay c\u1ee7a roto ","D . T\u1ea7n s\u1ed1 c\u1ee7a m\u00e1y ph\u00e1t \u0111i\u1ec7n \u1edf n\u01b0\u1edbc ta hi\u1ec7n nay l\u00e0 50Hz "],"hint":"","explain":"<span class='basic_left'>A , C , D - \u0111\u00fang | B - sai v\u00ec : Khi r\u00f4to c\u1ee7a m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u quay \u0111\u01b0\u1ee3c 1v\u00f2ng th\u00ec d\u00f2ng \u0111i\u1ec7n do m\u00e1y sinh ra \u0111\u1ed1i chi\u1ebfu 2 l\u1ea7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3304},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"\u0110\u1ed1i v\u1edbi m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 cu\u1ed9n d\u00e2y quay th\u00ec: ","select":["A. stato l\u00e0 nam ch\u00e2m.","B. stato l\u00e0 cu\u1ed9n d\u00e2y d\u1eabn.","C. stato l\u00e0 thanh qu\u00e9t.","D. stato l\u00e0 2 v\u00e0nh khuy\u00ean."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3305},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"\u0110\u1ed1i v\u1edbi m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 cu\u1ed9n d\u00e2y quay th\u00ec: ","select":["A. r\u00f4to l\u00e0 nam ch\u00e2m.","B. r\u00f4to l\u00e0 cu\u1ed9n d\u00e2y d\u1eabn.","C. r\u00f4to l\u00e0 b\u1ed9 g\u00f3p \u0111i\u1ec7n.","D. r\u00f4to l\u00e0 v\u00f5 s\u1eaft bao b\u1ecdc b\u00ean ngo\u00e0i."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3306},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Trong hai b\u1ed9 ph\u1eadn ch\u00ednh c\u1ee7a m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u, ng\u01b0\u1eddi ta qui \u01b0\u1edbc: ","select":["A. b\u1ed9 ph\u1eadn \u0111\u1ee9ng y\u00ean g\u1ecdi stato, b\u1ed9 ph\u1eadn quay \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 r\u00f4to.","B. b\u1ed9 ph\u1eadn \u0111\u1ee9ng y\u00ean g\u1ecdi r\u00f4to, b\u1ed9 ph\u1eadn quay \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 stato","C. c\u1ea3 hai b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 r\u00f4to.","D. c\u1ea3 hai b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 stato."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3307},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/vatly/bai34/lv2/img\/18.jpg'\/><\/center>Quan s\u00e1t h\u00ecnh b\u00ean v\u00e0 cho bi\u1ebft \u0111\u00e2y l\u00e0 s\u01a1 \u0111\u1ed3 c\u1ea5u t\u1ea1o c\u1ee7a lo\u1ea1i m\u00e1y n\u00e0o trong c\u00e1c lo\u1ea1i m\u00e1y sau: ","select":["A. M\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 cu\u1ed9n d\u00e2y quay","B. \u0110\u1ed9ng c\u01a1 \u0111i\u1ec7n m\u1ed9t chi\u1ec1u","C. M\u00e1y bi\u1ebfn th\u1ebf","D. M\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 nam ch\u00e2m quay"],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3308},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"\u0110\u1ed1i v\u1edbi m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 nam ch\u00e2m quay th\u00ec: ","select":["A. stato l\u00e0 nam ch\u00e2m.","B. stato l\u00e0 cu\u1ed9n d\u00e2y d\u1eabn.","C. stato l\u00e0 thanh qu\u00e9t.","D. stato l\u00e0 2 v\u00e0nh khuy\u00ean."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3309},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/vatly/bai34/lv2/img\/20.jpg'\/><\/center>Quan s\u00e1t h\u00ecnh b\u00ean v\u00e0 cho bi\u1ebft \u0111\u00e2y l\u00e0 s\u01a1 \u0111\u1ed3 c\u1ea5u t\u1ea1o c\u1ee7a lo\u1ea1i m\u00e1y n\u00e0o trong c\u00e1c lo\u1ea1i m\u00e1y sau: ","select":["A. M\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 cu\u1ed9n d\u00e2y quay","B. \u0110\u1ed9ng c\u01a1 \u0111i\u1ec7n m\u1ed9t chi\u1ec1u","C. M\u00e1y bi\u1ebfn th\u1ebf","D. M\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 nam ch\u00e2m quay"],"hint":"","explain":"<span class='basic_left'> <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3310}],"lesson":{"save":0,"level":2}}