{"segment":[{"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":" Thi\u1ebft b\u1ecb n\u00e0o sau \u0111\u00e2y ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u? ","select":["A. \u0110\u00e8n pin \u0111ang s\u00e1ng.","B. Nam ch\u00e2m \u0111i\u1ec7n.","C. B\u00ecnh \u0111i\u1ec7n ph\u00e2n.","D. Qu\u1ea1t tr\u1ea7n trong nh\u00e0 \u0111ang 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":2}]}],"id_ques":3271},{"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 cu\u1ed9n d\u00e2y d\u1eabn k\u00edn xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng xoay chi\u1ec1u khi s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y? ","select":["A. Lu\u00f4n lu\u00f4n t\u0103ng.","B. Lu\u00f4n lu\u00f4n gi\u1ea3m.","C. Lu\u00e2n phi\u00ean t\u0103ng, gi\u1ea3m.","D. Lu\u00f4n lu\u00f4n kh\u00f4ng \u0111\u1ed5i"],"hint":"","explain":"<span class='basic_left'>Trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng xoay chi\u1ec1u khi s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean 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 C.<\/span><\/span> ","column":2}]}],"id_ques":3272},{"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":"Tr\u01b0\u1eddng h\u1ee3p n\u00e0o d\u01b0\u1edbi \u0111\u00e2y th\u00ec trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng xoay chi\u1ec1u? ","select":["A. Cho nam ch\u00e2m chuy\u1ec3n \u0111\u1ed9ng l\u1ea1i g\u1ea7n cu\u1ed9n d\u00e2y.","B. Cho cu\u1ed9n d\u00e2y quay trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a nam ch\u00e2m v\u00e0 c\u1eaft c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb.","C. \u0110\u1eb7t thanh nam ch\u00e2m v\u00e0o trong l\u00f2ng cu\u1ed9n d\u00e2y r\u1ed3i r\u1ed3i cho c\u1ea3 hai \u0111\u1ec1u quay quanh m\u1ed9t tr\u1ee5c.","D. \u0110\u1eb7t thanh nam ch\u00e2m h\u00ecnh tr\u1ee5 tr\u01b0\u1edbc m\u1ed9t cu\u1ed9n d\u00e2y, vu\u00f4ng g\u00f3c v\u1edbi ti\u1ebft di\u1ec7n cu\u1ed9n d\u00e2y r\u1ed3i cho thanh nam ch\u00e2m quay quanh tr\u1ee5c c\u1ee7a n\u00f3."],"hint":"","explain":"<span class='basic_left'>Trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng xoay chi\u1ec1u khi: <br\/>Cho cu\u1ed9n d\u00e2y quay trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a nam ch\u00e2m v\u00e0 c\u1eaft c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb. V\u00ec l\u00fac \u0111\u00f3 s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a khung d\u00e2y d\u1eabn bi\u1ebfn thi\u00ean.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3273},{"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":" Tr\u01b0\u1eddng h\u1ee3p n\u00e0o d\u01b0\u1edbi \u0111\u00e2y trong cu\u1ed9n d\u00e2y kh\u00f4ng xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng xoay chi\u1ec1u?","select":["A. Cho nam ch\u00e2m quay tr\u01b0\u1edbc m\u1ed9t cu\u1ed9n d\u00e2y d\u1eabn k\u00edn, c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb b\u1ecb cu\u1ed9n d\u00e2y c\u1eaft ngang.","B. Cho cu\u1ed9n d\u00e2y d\u1eabn k\u00edn quay trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a nam ch\u00e2m v\u00e0 c\u1eaft c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u1ee7a t\u1eeb tr\u01b0\u1eddng.","C. Li\u00ean t\u1ee5c cho m\u1ed9t c\u1ef1c c\u1ee7a nam ch\u00e2m l\u1ea1i g\u1ea7n r\u1ed3i ra xa m\u1ed9t \u0111\u1ea7u d\u00e2y d\u1eabn k\u00edn.","D. \u0110\u1eb7t tr\u1ee5c B\u1eafc Nam c\u1ee7a thanh nam ch\u00e2m tr\u00f9ng v\u1edbi tr\u1ee5c c\u1ee7a m\u1ed9t \u1ed1ng d\u00e2y r\u1ed3i cho nam ch\u00e2m quay quanh tr\u1ee5c \u0111\u00f3."],"hint":"","explain":"<span class='basic_left'>Tr\u01b0\u1eddng h\u1ee3p trong cu\u1ed9n d\u00e2y kh\u00f4ng xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng xoay chi\u1ec1u: <br\/>\u0110\u1eb7t tr\u1ee5c B\u1eafc Nam c\u1ee7a thanh nam ch\u00e2m tr\u00f9ng v\u1edbi tr\u1ee5c c\u1ee7a m\u1ed9t \u1ed1ng d\u00e2y r\u1ed3i cho nam ch\u00e2m quay quanh tr\u1ee5c \u0111\u00f3. <br\/> v\u00ec s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a khung d\u00e2y d\u1eabn kh\u00f4ng bi\u1ebfn \u0111\u1ed5i.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3274},{"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 cu\u1ed9n d\u00e2y d\u1eabn k\u00edn xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng xoay chi\u1ec1u khi s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y: ","select":["A. Lu\u00f4n lu\u00f4n t\u0103ng.","B. Lu\u00f4n lu\u00f4n gi\u1ea3m.","C. Lu\u00e2n phi\u00ean t\u0103ng, gi\u1ea3m.","D. Lu\u00f4n lu\u00f4n kh\u00f4ng \u0111\u1ed5i"],"hint":"","explain":"<span class='basic_left'>L\u00e0 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u v\u00ec s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean 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 C.<\/span><\/span> ","column":2}]}],"id_ques":3275},{"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":"Cho cu\u1ed9n d\u00e2y d\u1eabn k\u00edn n\u1eb1m trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a m\u1ed9t cu\u1ed9n d\u00e2y kh\u00e1c c\u00f3 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ch\u1ea1y qua th\u00ec trong cu\u1ed9n d\u00e2y ","select":["A. kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng g\u00ec x\u1ea3y ra.","B. xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i.","C. xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u.","D. xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u."],"hint":"","explain":"<span class='basic_left'>T\u1eeb tr\u01b0\u1eddng c\u1ee7a m\u1ed9t cu\u1ed9n d\u00e2y c\u00f3 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ch\u1ea1y qua th\u00ec l\u00e0 t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean, khi cho cu\u1ed9n d\u00e2y d\u1eabn k\u00edn n\u1eb1m trong t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean th\u00ec sinh ra d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3276},{"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":"Ng\u01b0\u1eddi ta kh\u00f4ng d\u00f9ng d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u \u0111\u1ec3 ch\u1ebf t\u1ea1o nam ch\u00e2m v\u0129nh c\u1eedu v\u00ec l\u00f5i th\u00e9p \u0111\u1eb7t trong \u1ed1ng d\u00e2y ","select":["A. kh\u00f4ng b\u1ecb nhi\u1ec5m t\u1eeb.","B. b\u1ecb nhi\u1ec5m t\u1eeb r\u1ea5t y\u1ebfu.","C. kh\u00f4ng c\u00f3 hai t\u1eeb c\u1ef1c \u1ed5n \u0111\u1ecbnh.","D. b\u1ecb n\u00f3ng l\u00ean."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3277},{"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":" D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u kh\u00e1c d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u \u1edf \u0111i\u1ec3m :","select":["A. d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ch\u1ec9 \u0111\u1ed5i chi\u1ec1u m\u1ed9t l\u1ea7n.","B. d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 chi\u1ec1u lu\u00e2n phi\u00ean thay \u0111\u1ed5i.","C. c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u lu\u00f4n t\u0103ng.","D. hi\u1ec7u \u0111i\u1ec7n th\u1ebf c\u1ee7a d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u lu\u00f4n t\u0103ng."],"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":3278},{"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\u00e1ch n\u00e0o sau \u0111\u00e2y kh\u00f4ng t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ","select":["A. Cho nam ch\u00e2m quay tr\u01b0\u1edbc cu\u1ed9n d\u00e2y d\u1eabn k\u00edn.","B. Cho cu\u1ed9n d\u00e2y n\u1eb1m y\u00ean trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a m\u1ed9t cu\u1ed9n d\u00e2y kh\u00e1c c\u00f3 d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u ch\u1ea1y qua.","C. Cho cu\u1ed9n d\u00e2y n\u1eb1m y\u00ean trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a m\u1ed9t cu\u1ed9n d\u00e2y kh\u00e1c c\u00f3 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ch\u1ea1y qua.","D. Cho cu\u1ed9n d\u00e2y d\u1eabn k\u00edn quay trong t\u1eeb tr\u01b0\u1eddng."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3279},{"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":" \u0110i\u1ec1u n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang khi n\u00f3i v\u1ec1 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u","select":["A. Vi\u1ec7c s\u1ea3n xu\u1ea5t \u00edt t\u1ed1n k\u00e9m.","B. S\u1eed d\u1ee5ng ti\u1ec7n l\u1ee3i.","C. Kh\u00f3 truy\u1ec1n t\u1ea3i \u0111i xa.","D. C\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh th\u00e0nh d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u. "],"hint":"","explain":"<span class='basic_left'>D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u d\u1ec5 d\u00e0ng truy\u1ec1n t\u1ea3i \u0111i xa. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3280},{"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":" D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u xu\u1ea5t hi\u1ec7n trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn khi ","select":["A. cho nam ch\u00e2m n\u1eb1m y\u00ean trong l\u00f2ng cu\u1ed9n d\u00e2y.","B. cho nam ch\u00e2m quay tr\u01b0\u1edbc cu\u1ed9n d\u00e2y.","C. cho nam ch\u00e2m \u0111\u1ee9ng y\u00ean tr\u01b0\u1edbc cu\u1ed9n d\u00e2y.","D. \u0111\u1eb7t cu\u1ed9n d\u00e2y trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a m\u1ed9t nam ch\u00e2m."],"hint":"","explain":"<span class='basic_left'>D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u xu\u1ea5t hi\u1ec7n trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn khi cho nam ch\u00e2m quay tr\u01b0\u1edbc cu\u1ed9n d\u00e2y v\u00ec s\u1ebd sinh ra t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean xuy\u00ean qua cu\u1ed9n d\u00e2y.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3281},{"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":"Khi cho cu\u1ed9n d\u00e2y d\u1eabn k\u00edn quay trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a m\u1ed9t nam ch\u00e2m th\u00ec trong cu\u1ed9n d\u00e2y. ","select":["A. xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u.","B. xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u.","C. xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i.","D. kh\u00f4ng xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n."],"hint":"","explain":"<span class='basic_left'>Khi cho cu\u1ed9n d\u00e2y d\u1eabn k\u00edn quay trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a m\u1ed9t nam ch\u00e2m th\u00ec trong cu\u1ed9n d\u00e2y xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u v\u00ec c\u00f3 t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean xuy\u00ean qua cu\u1ed9n d\u00e2y.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3282},{"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":"D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u xu\u1ea5t hi\u1ec7n trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn khi s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y ","select":["A. l\u1edbn.","B. kh\u00f4ng thay \u0111\u1ed5i.","C. bi\u1ebfn thi\u00ean.","D. nh\u1ecf."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3283},{"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":"D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb ","select":["A. \u0111inam\u00f4 xe \u0111\u1ea1p.","B. acquy.","C. pin.","D. m\u1ed9t nam ch\u00e2m."],"hint":"","explain":"<span class='basic_left'>\u0110inam\u00f4 xe \u0111\u1ea1p chuy\u1ec3n chuy\u1ec3n \u0111\u1ed9ng quay c\u1ee7a xe \u0111\u1ea1p th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n, c\u1ea5u t\u1ea1o t\u01b0\u01a1ng t\u1ef1 m\u00e1y ph\u00e1t \u0111i\u1ec7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3284},{"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":" D\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn \u0111\u1ed5i chi\u1ec1u khi :","select":["A . s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y t\u0103ng l\u00ean.","B . s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y \u0111ang t\u0103ng m\u00e0 chuy\u1ec3n sang gi\u1ea3m ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i \u0111ang gi\u1ea3m m\u00e0 chuy\u1ec3n sang t\u0103ng . ","C . s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y gi\u1ea3m \u0111i.","D . s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y kh\u00f4ng thay \u0111\u1ed5i."],"hint":"","explain":"<span class='basic_left'>D\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn \u0111\u1ed5i chi\u1ec1u khi s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y \u0111ang t\u0103ng chuy\u1ec3n sang gi\u1ea3m ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i \u0111ang gi\u1ea3m m\u00e0 chuy\u1ec3n sang t\u0103ng . <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3285},{"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":" D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u l\u00e0 :","select":["A . d\u00f2ng \u0111i\u1ec7n lu\u00e2n phi\u00ean \u0111\u1ed5i chi\u1ec1u","B . d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i ","C . d\u00f2ng \u0111i\u1ec7n c\u00f3 chi\u1ec1u t\u1eeb tr\u00e1i qua ph\u1ea3i ","D . d\u00f2ng \u0111i\u1ec7n c\u00f3 m\u1ed9t chi\u1ec1u c\u1ed1 \u0111\u1ecbnh"],"hint":"","explain":"<span class='basic_left'>D\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn \u0111\u1ed5i chi\u1ec1u khi s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a cu\u1ed9n d\u00e2y \u0111ang t\u0103ng m\u00e0 chuy\u1ec3n sang gi\u1ea3m ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i \u0111ang gi\u1ea3m m\u00e0 chuy\u1ec3n sang t\u0103ng . D\u00f2ng \u0111i\u1ec7n lu\u00e2n phi\u00ean \u0111\u1ed5i chi\u1ec1u nh\u01b0 th\u1ec3 g\u1ecdi l\u00e0 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u . <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3286},{"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 c\u00e1ch t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ","select":["A. 1","B. 2","C. 3","D. 4"],"hint":"","explain":"<span class='basic_left'>\u0110\u00f3 l\u00e0 cho t\u1eeb tr\u01b0\u1eddng thay \u0111\u1ed5i xuy\u00ean qua v\u00f2ng d\u00e2n d\u1eabn c\u1ed1 \u0111\u1ecbnh ho\u1eb7c cho d\u00e2y d\u1eabn di chuy\u1ec3n trong t\u1eeb tr\u01b0\u1eddng c\u1ed1 \u0111\u1ecbnh. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3287},{"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/bai33/lv2/img\/19.jpg'\/><\/center>Ch\u1ecdn ph\u00e1t bi\u1ec3u \u0111\u00fang . Khi cho khung quay quanh tr\u1ee5c PQ n\u1eb1m ngang ","select":["A . Trong khung kh\u00f4ng xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u do s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb qua kh\u00f4ng d\u00e2y lu\u00f4n b\u1eb1ng kh\u00f4ng ","B . Trong khung xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ","C . Trong khung kh\u00f4ng xu\u1ea5t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u do s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb qua khung lu\u00f4n thay \u0111\u1ed5i .","D . Kh\u00f4ng x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c trong ch\u00fang c\u00f3 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u kh\u00f4ng "],"hint":"","explain":"<span class='basic_left'>Khi cho khung d\u00e2y quay quanh tr\u1ee5c PQ n\u1eb1m ngang th\u00ec c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb g\u1eedi qua khung d\u00e2y v\u1eabn lu\u00f4n b\u1eb1ng kh\u00f4ng t\u1ee9c l\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3288},{"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/bai33/lv2/img\/20.jpg'\/><\/center>Trong th\u00ed nghi\u1ec7m b\u1ed1 tr\u00ed nh\u01b0 h\u00ecnh sau, d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u xu\u1ea5t hi\u1ec7n trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn khi:","select":["A. Nam ch\u00e2m \u0111\u1ee9ng y\u00ean, cu\u1ed9n d\u00e2y quay quanh tr\u1ee5c PQ.","B. Nam ch\u00e2m v\u00e0 cu\u1ed9n d\u00e2y \u0111\u1ec1u quay quanh tr\u1ee5c PQ.","C. Nam ch\u00e2m v\u00e0 cu\u1ed9n d\u00e2y chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng c\u00f9ng chi\u1ec1u v\u1edbi c\u00f9ng v\u1eadn t\u1ed1c.","D. Nam ch\u00e2m \u0111\u1ee9ng y\u00ean, cu\u1ed9n d\u00e2y d\u1eabn quay quanh tr\u1ee5c AB."],"hint":"","explain":"<span class='basic_left'>D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u xu\u1ea5t hi\u1ec7n trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn khi: Nam ch\u00e2m \u0111\u1ee9ng y\u00ean, cu\u1ed9n d\u00e2y d\u1eabn quay quanh tr\u1ee5c AB. V\u00ec khi \u0111\u00f3 s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuy\u00ean qua ti\u1ebft di\u1ec7n S c\u1ee7a khung d\u00e2y d\u1eabn 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":3289},{"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/bai33/lv2/img\/18.jpg'\/><\/center>Trong th\u00ed nghi\u1ec7m nh\u01b0 h\u00ecnh sau , d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u xu\u1ea5t hi\u1ec7n trong cu\u1ed9n d\u00e2y d\u1eabn k\u00edn khi : Tr\u1ee5c quay ","select":["A . Nam ch\u00e2m \u0111\u1ee9ng y\u00ean , cu\u1ed9n d\u00e2y quay quanh tr\u1ee5c PQ"," B . Nam ch\u00e2m v\u00e0 cu\u1ed9n d\u00e2y \u0111\u1ec1u quay quanh tr\u1ee5c PQ ","C . Nam ch\u00e2m v\u00e0 cu\u1ed9n d\u00e2y chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng c\u00f9ng chi\u1ec1u v\u1edbi c\u00f9ng v\u1eadn t\u1ed1c","D. Nam ch\u00e2m \u0111\u1ee9ng y\u00ean, cu\u1ed9n d\u00e2y quay quanh tr\u1ee5c AB"],"hint":"","explain":"<span class='basic_left'> Nam ch\u00e2m \u0111\u1ee9ng y\u00ean, cu\u1ed9n d\u00e2y quay quanh tr\u1ee5c AB khi \u0111\u00f3 s\u1ebd l\u00e0m t\u1eeb tr\u01b0\u1eddng \u0111i qua cu\u1ed9c d\u00e2y thay \u0111\u1ed5i. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3290}],"lesson":{"save":0,"level":2}}