{"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":"Trong th\u00ed nghi\u1ec7m ph\u00e1t hi\u1ec7n t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n, d\u00e2y d\u1eabn AB \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed nh\u01b0 th\u1ebf n\u00e0o?","select":["A. T\u1ea1o v\u1edbi kim nam ch\u00e2m m\u1ed9t g\u00f3c b\u1ea5t k\u00ec.","B. Song song v\u1edbi kim nam ch\u00e2m.","C. Vu\u00f4ng g\u00f3c v\u1edbi kim nam ch\u00e2m.","D. T\u1ea1o v\u1edbi kim nam ch\u00e2m m\u1ed9t g\u00f3c nh\u1ecdn."],"hint":"","explain":"<span class='basic_left'>Trong th\u00ed nghi\u1ec7m ph\u00e1t hi\u1ec7n t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n, d\u00e2y d\u1eabn AB \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed song song v\u1edbi kim nam ch\u00e2m. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3071},{"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":"T\u1eeb tr\u01b0\u1eddng kh\u00f4ng t\u1ed3n t\u1ea1i \u1edf \u0111\u00e2u?","select":["A. Xung quanh nam ch\u00e2m.","B. Xung quanh d\u00f2ng \u0111i\u1ec7n.","C. Xung quanh \u0111i\u1ec7n t\u00edch \u0111\u1ee9ng y\u00ean.","D. Xung quanh tr\u00e1i \u0111\u1ea5t."],"hint":"","explain":"<span class='basic_left'>V\u00ec Kh\u00f4ng gian xung quanh nam ch\u00e2m, xung quanh d\u00f2ng \u0111i\u1ec7n c\u00f3 kh\u1ea3 n\u0103ng t\u00e1c d\u1ee5ng l\u1ef1c t\u1eeb l\u00ean kim nam ch\u00e2m \u0111\u1eb7t trong n\u00f3. Ta n\u00f3i trong kh\u00f4ng gian \u0111\u00f3 c\u00f3 t\u1eeb tr\u01b0\u1eddng. Tr\u00e1i \u0111\u1ea5t l\u00e0 m\u1ed9t nam ch\u00e2m kh\u1ed5ng l\u1ed3.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3072},{"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\u1ef1a v\u00e0o hi\u1ec7n t\u01b0\u1ee3ng n\u00e0o d\u01b0\u1edbi \u0111\u00e2y m\u00e0 k\u1ebft lu\u1eadn r\u1eb1ng d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua d\u00e2y d\u1eabn th\u1eb3ng c\u00f3 t\u1eeb tr\u01b0\u1eddng?","select":["A. D\u00e2y d\u1eabn h\u00fat nam ch\u00e2m l\u1ea1i g\u1ea7n n\u00f3.","B. D\u00e2y d\u1eabn h\u00fat c\u00e1c v\u1ee5n s\u1eaft l\u1ea1i g\u1ea7n n\u00f3.","C. D\u00f2ng \u0111i\u1ec7n l\u00e0m cho kim nam ch\u00e2m l\u1ea1i g\u1ea7n v\u00e0 song song v\u1edbi n\u00f3 l\u1ec7ch kh\u1ecfi h\u01b0\u1edbng B\u1eafc Nam ban \u0111\u1ea7u.","D. D\u00f2ng \u0111i\u1ec7n l\u00e0m cho kim nam ch\u00e2m lu\u00f4n lu\u00f4n c\u00f9ng h\u01b0\u1edbng v\u1edbi d\u00e2y d\u1eabn."],"hint":"","explain":"<span class='basic_left'>D\u1ef1a v\u00e0o hi\u1ec7n t\u01b0\u1ee3ng : d\u00f2ng \u0111i\u1ec7n l\u00e0m cho kim nam ch\u00e2m l\u1ea1i g\u1ea7n v\u00e0 song song v\u1edbi n\u00f3 l\u1ec7ch kh\u1ecfi h\u01b0\u1edbng B\u1eafc Nam ban \u0111\u1ea7u n\u00ean ta k\u1ebft lu\u1eadn r\u1eb1ng d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua d\u00e2y d\u1eabn th\u1eb3ng c\u00f3 t\u1eeb tr\u01b0\u1eddng. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3073},{"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":"L\u1ef1c do d\u00f2ng \u0111i\u1ec7n t\u00e1c d\u1ee5ng l\u00ean kim nam ch\u00e2m \u0111\u1ec3 g\u1ea7n n\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0","select":["A. l\u1ef1c h\u1ea5p d\u1eabn. ","B. l\u1ef1c \u0111i\u1ec7n t\u1eeb. ","C. l\u1ef1c \u0111i\u1ec7n.","D. l\u1ef1c t\u1eeb."],"hint":"","explain":"<span class='basic_left'>L\u1ef1c do d\u00f2ng \u0111i\u1ec7n t\u00e1c d\u1ee5ng l\u00ean kim nam ch\u00e2m \u0111\u1ec3 g\u1ea7n n\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0: l\u1ef1c \u0111i\u1ec7n t\u1eeb.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3074},{"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":"C\u00f3 th\u1ec3 coi m\u1ed9t d\u00e2y d\u1eabn th\u1eb3ng d\u00e0i c\u00f3 d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u ch\u1ea1y qua nh\u01b0 m\u1ed9t nam ch\u00e2m th\u1eb3ng \u0111\u01b0\u1ee3c kh\u00f4ng? V\u00ec sao?","select":["A. C\u00f3 th\u1ec3, v\u00ec d\u00f2ng \u0111i\u1ec7n t\u00e1c d\u1ee5ng l\u1ef1c t\u1eeb l\u00ean kim nam ch\u00e2m \u0111\u1ec3 g\u1ea7n n\u00f3.","B. C\u00f3 th\u1ec3, v\u00ec d\u00f2ng \u0111i\u1ec7n t\u00e1c d\u1ee5ng l\u1ef1c t\u1eeb l\u00ean v\u1eadt b\u1eb1ng s\u1eaft \u0111\u1ec3 g\u1ea7n n\u00f3.","C. Kh\u00f4ng th\u1ec3, v\u00ec d\u00f2ng \u0111i\u1ec7n trong d\u00e2y d\u1eabn th\u1eb3ng kh\u00f4ng h\u00fat c\u00e1c v\u1ee5n s\u1eaft v\u1ec1 hai \u0111\u1ea7u d\u00e2y nh\u01b0 hai c\u1ef1c c\u1ee7a nam ch\u00e2m th\u1eb3ng.","D. Kh\u00f4ng th\u1ec3, v\u00ec d\u00f2ng \u0111i\u1ec7n trong d\u00e2y d\u1eabn th\u1eb3ng d\u00e0i lu\u00f4n c\u00f3 t\u00e1c d\u1ee5ng nh\u01b0 nhau l\u00ean c\u00e1c v\u1ee5n s\u1eaft \u1edf b\u1ea5t k\u00ec \u0111i\u1ec3m n\u00e0o c\u1ee7a d\u00e2y."],"hint":"","explain":"<span class='basic_left'>Kh\u00f4ng th\u1ec3, v\u00ec d\u00f2ng \u0111i\u1ec7n trong d\u00e2y d\u1eabn th\u1eb3ng d\u00e0i lu\u00f4n c\u00f3 t\u00e1c d\u1ee5ng nh\u01b0 nhau l\u00ean c\u00e1c v\u1ee5n s\u1eaft \u1edf b\u1ea5t k\u00ec \u0111i\u1ec3m n\u00e0o c\u1ee7a d\u00e2y.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3075},{"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":"C\u00f3 m\u1ed9t s\u1ed1 pin \u0111\u1ec3 l\u00e2u ng\u00e0y v\u00e0 m\u1ed9t \u0111o\u1ea1n d\u00e2y d\u1eabn. N\u1ebfu kh\u00f4ng c\u00f3 b\u00f3ng \u0111\u00e8n pin \u0111\u1ec3 th\u1eed, c\u00f3 th\u1ec3 ki\u1ec3m tra \u0111\u01b0\u1ee3c pin c\u00f2n \u0111i\u1ec7n hay kh\u00f4ng khi trong tay b\u1ea1n c\u00f3 m\u1ed9t kim nam ch\u00e2m?","select":["A. C\u00f3 th\u1ec3, n\u1ebfu kim nam ch\u00e2m b\u1ecb l\u1ec7ch kh\u1ecfi h\u01b0\u1edbng Nam \u2013 B\u1eafc th\u00ec pin c\u00f2n \u0111i\u1ec7n.","B. C\u00f3 th\u1ec3, n\u1ebfu kim nam ch\u00e2m kh\u00f4ng b\u1ecb l\u1ec7ch.","C. Kh\u00f4ng th\u1ec3, v\u00ec kim nam kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng khi pin c\u00f2n \u0111i\u1ec7n hay kh\u00f4ng.","D. Kh\u00f4ng th\u1ec3, v\u00ec kim nam ch\u00e2m lu\u00f4n \u1edf h\u01b0\u1edbng Nam \u2013 B\u1eafc d\u00f9 c\u00f3 b\u1ecb \u1ea3nh h\u01b0\u1edfng hay kh\u00f4ng."],"hint":"","explain":"<span class='basic_left'>M\u1eafc hai \u0111\u1ea7u d\u00e2y d\u1eabn v\u00e0o hai c\u1ef1c c\u1ee7a pin cho d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua d\u00e2y d\u1eabn. \u0110\u01b0a kim nam ch\u00e2m l\u1ea1i g\u1ea7n d\u00e2y d\u1eabn. N\u1ebfu kim nam ch\u00e2m b\u1ecb l\u1ec7ch kh\u1ecfi h\u01b0\u1edbng Nam \u2013 B\u1eafc th\u00ec pin c\u00f2n \u0111i\u1ec7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3076},{"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":"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c t\u1ea1i m\u1ed9t \u0111i\u1ec3m trong kh\u00f4ng gian c\u00f3 t\u1eeb tr\u01b0\u1eddng?","select":["A. \u0110\u1eb7t \u1edf \u0111i\u1ec3m \u0111\u00f3 m\u1ed9t s\u1ee3i d\u00e2y d\u1eabn, d\u00e2y b\u1ecb n\u00f3ng l\u00ean.","B. \u0110\u1eb7t \u1edf \u0111\u00f3 m\u1ed9t kim nam ch\u00e2m, kim b\u1ecb l\u1ec7ch kh\u1ecfi h\u01b0\u1edbng B\u1eafc Nam.","C. \u0110\u1eb7t \u1edf n\u01a1i \u0111\u00f3 c\u00e1c v\u1ee5n gi\u1ea5y th\u00ec ch\u00fang b\u1ecb h\u00fat v\u1ec1 hai h\u01b0\u1edbng B\u1eafc Nam.","D. \u0110\u1eb7t \u1edf \u0111\u00f3 kim b\u1eb1ng \u0111\u1ed3ng, kim lu\u00f4n ch\u1ec9 h\u01b0\u1edbng B\u1eafc Nam."],"hint":"","explain":"<span class='basic_left'>\u0110\u1ec3 nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c t\u1ea1i m\u1ed9t \u0111i\u1ec3m trong kh\u00f4ng gian c\u00f3 t\u1eeb tr\u01b0\u1eddng khi ta \u0111\u1eb7t \u1edf \u0111\u00f3 m\u1ed9t kim nam ch\u00e2m, kim b\u1ecb l\u1ec7ch kh\u1ecfi h\u01b0\u1edbng B\u1eafc Nam.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3077},{"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":"Ng\u01b0\u1eddi ta d\u00f9ng d\u1ee5ng c\u1ee5 n\u00e0o \u0111\u1ec3 nh\u1eadn bi\u1ebft t\u1eeb tr\u01b0\u1eddng?","select":["A. D\u00f9ng ampe k\u1ebf","B. D\u00f9ng v\u00f4n k\u1ebf","C. D\u00f9ng \u00e1p k\u1ebf.","D. D\u00f9ng kim nam ch\u00e2m c\u00f3 tr\u1ee5c quay."],"hint":"","explain":"<span class='basic_left'>Ng\u01b0\u1eddi ta d\u00f9ng kim nam ch\u00e2m c\u00f3 tr\u1ee5c quay \u0111\u1ec3 nh\u1eadn bi\u1ebft t\u1eeb tr\u01b0\u1eddng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3078},{"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":"Tr\u01b0\u1eddng h\u1ee3p n\u00e0o sau \u0111\u00e2y l\u00e0 bi\u1ec3u hi\u1ec7n c\u1ee7a t\u1eeb tr\u01b0\u1eddng?","select":["A. D\u00e2y d\u1eabn n\u00f3ng l\u00ean khi c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua.","B. D\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 ph\u00e2n t\u00edch mu\u1ed1i \u0111\u1ed3ng v\u00e0 gi\u1ea3i ph\u00f3ng \u0111\u1ed3ng nguy\u00ean ch\u1ea5t.","C. Cu\u1ed9n d\u00e2y c\u00f3 d\u00f2ng \u0111i\u1ec7n qu\u1ea5n quanh l\u00f5i s\u1eaft, h\u00fat \u0111\u01b0\u1ee3c nh\u1eefng v\u1eadt nh\u1ecf b\u1eb1ng s\u1eaft.","D. D\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 g\u00e2y co gi\u1eadt ho\u1eb7c l\u00e0m ch\u1ebft ng\u01b0\u1eddi."],"hint":"","explain":"<span class='basic_left'>Cu\u1ed9n d\u00e2y c\u00f3 d\u00f2ng \u0111i\u1ec7n qu\u1ea5n quanh l\u00f5i s\u1eaft, h\u00fat \u0111\u01b0\u1ee3c nh\u1eefng v\u1eadt nh\u1ecf b\u1eb1ng s\u1eaft. Khi \u0111\u00f3 cu\u1ed9n d\u00e2y c\u00f3 d\u00f2ng \u0111i\u1ec7n qu\u1ea5n quanh l\u00f5i s\u1eaft t\u01b0\u01a1ng \u0111\u01b0\u01a1ng m\u1ed9t nam ch\u00e2m \u0111i\u1ec7n. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3079},{"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\u1ed9t nam ch\u00e2m \u0111i\u1ec7n g\u1ed3m cu\u1ed9n d\u00e2y","select":["A. kh\u00f4ng c\u00f3 l\u00f5i.","B. c\u00f3 l\u00f5i l\u00e0 m\u1ed9t thanh th\u00e9p.","C. c\u00f3 l\u00f5i l\u00e0 m\u1ed9t thanh s\u1eaft non.","D. c\u00f3 l\u00f5i l\u00e0 m\u1ed9t thanh nam ch\u00e2m."],"hint":"","explain":"<span class='basic_left'>M\u1ed9t nam ch\u00e2m \u0111i\u1ec7n g\u1ed3m cu\u1ed9n d\u00e2y c\u00f3 l\u00f5i l\u00e0 m\u1ed9t thanh s\u1eaft non. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3080},{"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":"C\u00e2u ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang khi n\u00f3i v\u1ec1 t\u1eeb tr\u01b0\u1eddng c\u1ee7a d\u00f2ng \u0111i\u1ec7n?","select":["A. Xung quanh b\u1ea5t k\u00ec d\u00f2ng \u0111i\u1ec7n n\u00e0o c\u0169ng c\u00f3 t\u1eeb tr\u01b0\u1eddng.","B. T\u1eeb tr\u01b0\u1eddng ch\u1ec9 t\u1ed3n t\u1ea1i xung quanh nh\u1eefng d\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 r\u1ea5t l\u1edbn.","C. D\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 nh\u1ecf kh\u00f4ng t\u1ea1o t\u1eeb tr\u01b0\u1eddng xung quanh n\u00f3.","D. T\u1eeb tr\u01b0\u1eddng ch\u1ec9 t\u1ed3n t\u1ea1i \u1edf s\u00e1t m\u1eb7t d\u00e2y d\u1eabn c\u00f3 d\u00f2ng \u0111i\u1ec7n."],"hint":"","explain":"<span class='basic_left'>Ph\u00e1t bi\u1ec3u \u0111\u00fang l\u00e0: Xung quanh b\u1ea5t k\u00ec d\u00f2ng \u0111i\u1ec7n n\u00e0o c\u0169ng c\u00f3 t\u1eeb tr\u01b0\u1eddng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3081},{"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":"Ng\u01b0\u1eddi ta s\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 n\u00e0o sau \u0111\u00e2y \u0111\u1ec3 nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c t\u1eeb tr\u01b0\u1eddng.","select":["A. D\u00f9ng \u0111i\u1ec7n k\u1ebf.","B. D\u00f9ng c\u00e1c gi\u00e1c quan.","C. D\u00f9ng c\u00e1c \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng treo tr\u00ean d\u00e2y t\u01a1.","D. D\u00f9ng kim nam ch\u00e2m."],"hint":"","explain":"<span class='basic_left'>D\u00f9ng kim nam ch\u00e2m \u0111\u1ec3 nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c t\u1eeb tr\u01b0\u1eddng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3082},{"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":"L\u1ef1c n\u00e0o sau \u0111\u00e2y l\u00e0 l\u1ef1c \u0111i\u1ec7n t\u1eeb, ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang nh\u1ea5t.","select":["A. L\u1ef1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a nam ch\u00e2m l\u00ean kim nam ch\u00e2m.","B. L\u1ef1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a nam ch\u00e2m \u0111i\u1ec7n l\u00ean s\u1eaft, th\u00e9p.","C. L\u1ef1c t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c nam ch\u00e2m \u0111i\u1ec7n.","D. L\u1ef1c c\u1ee7a t\u1eeb tr\u01b0\u1eddng t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t \u0111o\u1ea1n d\u00e2y d\u1eabn c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua."],"hint":"","explain":"<span class='basic_left'>L\u1ef1c c\u1ee7a t\u1eeb tr\u01b0\u1eddng t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t \u0111o\u1ea1n d\u00e2y d\u1eabn c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua l\u00e0 l\u1ef1c t\u1eeb do t\u1eeb tr\u01b0\u1eddng c\u1ee7a d\u00f2ng \u0111i\u1ec7n t\u00e1c d\u1ee5ng l\u00ean d\u00e2y d\u1eabn. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3083},{"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":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng:<br\/>T\u1ea1i m\u1ed9t v\u1ecb tr\u00ed nh\u1ea5t \u0111\u1ecbnh trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a nam ch\u00e2m ho\u1eb7c c\u1ee7a d\u00f2ng \u0111i\u1ec7n, kim nam ch\u00e2m \u0111\u1ec1u ch\u1ec9 m\u1ed9t h\u01b0\u1edbng\u2026\u2026","select":["A. x\u00e1c \u0111\u1ecbnh.","B. \u0110\u00f4ng.","C. T\u00e2y.","D. kh\u00f4ng x\u00e1c \u0111\u1ecbnh."],"hint":"","explain":"<span class='basic_left'>T\u1ea1i m\u1ed9t v\u1ecb tr\u00ed nh\u1ea5t \u0111\u1ecbnh trong t\u1eeb tr\u01b0\u1eddng c\u1ee7a nam ch\u00e2m ho\u1eb7c c\u1ee7a d\u00f2ng \u0111i\u1ec7n, kim nam ch\u00e2m \u0111\u1ec1u ch\u1ec9 m\u1ed9t h\u01b0\u1edbng x\u00e1c \u0111\u1ecbnh. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3084},{"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\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng:<br\/>N\u01a1i n\u00e0o trong kh\u00f4ng gian c\u00f3 l\u1ef1c t\u1eeb t\u00e1c d\u1ee5ng l\u00ean \u2026\u2026 th\u00ec n\u01a1i \u0111\u00f3 c\u00f3 t\u1eeb tr\u01b0\u1eddng.","select":["A. cu\u1ed9n d\u00e2y d\u1eabn.","B. thanh s\u1eaft non.","C. kim nam ch\u00e2m.","D. \u0111i\u1ec7n tr\u1edf."],"hint":"","explain":"<span class='basic_left'>N\u01a1i n\u00e0o trong kh\u00f4ng gian c\u00f3 l\u1ef1c t\u1eeb t\u00e1c d\u1ee5ng l\u00ean kim nam ch\u00e2m th\u00ec n\u01a1i \u0111\u00f3 c\u00f3 t\u1eeb tr\u01b0\u1eddng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3085},{"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":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng:<br\/>Kh\u00f4ng gian xung quanh nam ch\u00e2m, xung quanh d\u00f2ng \u0111i\u1ec7n c\u00f3 kh\u1ea3 n\u0103ng t\u00e1c d\u1ee5ng \u2026\u2026 l\u00ean kim nam ch\u00e2m \u0111\u1eb7t trong n\u00f3. Ta n\u00f3i trong kh\u00f4ng gian \u0111\u00f3 c\u00f3 t\u1eeb tr\u01b0\u1eddng.","select":["A. l\u1ef1c h\u1ea5p d\u1eabn.","B. l\u1ef1c t\u1eeb.","C. l\u1ef1c \u0111\u00e0n h\u1ed3i.","D. l\u1ef1c ma s\u00e1t."],"hint":"","explain":"<span class='basic_left'>Kh\u00f4ng gian xung quanh nam ch\u00e2m, xung quanh d\u00f2ng \u0111i\u1ec7n c\u00f3 kh\u1ea3 n\u0103ng t\u00e1c d\u1ee5ng l\u1ef1c t\u1eeb l\u00ean kim nam ch\u00e2m \u0111\u1eb7t trong n\u00f3. Ta n\u00f3i trong kh\u00f4ng gian \u0111\u00f3 c\u00f3 t\u1eeb tr\u01b0\u1eddng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3086},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y l\u00e0 kh\u00f4ng \u0111\u00fang?<br\/>Ng\u01b0\u1eddi ta nh\u1eadn ra t\u1eeb tr\u01b0\u1eddng t\u1ed3n t\u1ea1i xung quanh d\u00e2y d\u1eabn mang d\u00f2ng \u0111i\u1ec7n v\u00ec:","select":["A. c\u00f3 l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t d\u00f2ng \u0111i\u1ec7n kh\u00e1c \u0111\u1eb7t song song c\u1ea1nh n\u00f3.","B. c\u00f3 l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t kim nam ch\u00e2m \u0111\u1eb7t song song c\u1ea1nh n\u00f3.","C. c\u00f3 l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t h\u1ea1t mang \u0111i\u1ec7n chuy\u1ec3n \u0111\u1ed9ng d\u1ecdc theo n\u00f3.","D. c\u00f3 l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t h\u1ea1t mang \u0111i\u1ec7n \u0111\u1ee9ng y\u00ean \u0111\u1eb7t b\u00ean c\u1ea1nh n\u00f3."],"hint":"","explain":"<span class='basic_left'>Ng\u01b0\u1eddi ta nh\u1eadn ra t\u1eeb tr\u01b0\u1eddng t\u1ed3n t\u1ea1i xung quanh d\u00e2y d\u1eabn mang d\u00f2ng \u0111i\u1ec7n v\u00ec: c\u00f3 l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t h\u1ea1t mang \u0111i\u1ec7n chuy\u1ec3n \u0111\u1ed9ng b\u00ean c\u1ea1nh n\u00f3.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3087},{"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":"T\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n c\u1ee7a t\u1eeb tr\u01b0\u1eddng l\u00e0:","select":["A. g\u00e2y ra l\u1ef1c t\u1eeb t\u00e1c d\u1ee5ng l\u00ean nam ch\u00e2m ho\u1eb7c l\u00ean d\u00f2ng \u0111i\u1ec7n \u0111\u1eb7t trong n\u00f3.","B. g\u00e2y ra l\u1ef1c h\u1ea5p d\u1eabn l\u00ean c\u00e1c v\u1eadt \u0111\u1eb7t trong n\u00f3.","C. g\u00e2y ra l\u1ef1c \u0111\u00e0n h\u1ed3i t\u00e1c d\u1ee5ng l\u00ean c\u00e1c d\u00f2ng \u0111i\u1ec7n v\u00e0 nam ch\u00e2m \u0111\u1eb7t trong n\u00f3.","D. g\u00e2y ra s\u1ef1 bi\u1ebfn \u0111\u1ed5i v\u1ec1 t\u00ednh ch\u1ea5t \u0111i\u1ec7n c\u1ee7a m\u00f4i tr\u01b0\u1eddng xung quanh."],"hint":"","explain":"<span class='basic_left'>T\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n c\u1ee7a t\u1eeb tr\u01b0\u1eddng l\u00e0 g\u00e2y ra l\u1ef1c t\u1eeb t\u00e1c d\u1ee5ng l\u00ean nam ch\u00e2m ho\u1eb7c l\u00ean d\u00f2ng \u0111i\u1ec7n \u0111\u1eb7t trong n\u00f3.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3088},{"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":"T\u1eeb tr\u01b0\u1eddng t\u1ed3n t\u1ea1i \u1edf \u0111\u00e2u?","select":["A. Xung quanh b\u1ea5t k\u00ec d\u00f2ng \u0111i\u1ec7n n\u00e0o c\u0169ng c\u00f3 t\u1eeb tr\u01b0\u1eddng.","B. Xung quanh nh\u1eefng d\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 r\u1ea5t l\u1edbn.","C. D\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 nh\u1ecf kh\u00f4ng t\u1ea1o t\u1eeb tr\u01b0\u1eddng xung quanh n\u00f3.","D. Xung quanh \u0111i\u1ec7n t\u00edch \u0111\u1ee9ng y\u00ean."],"hint":"","explain":"<span class='basic_left'>T\u1eeb tr\u01b0\u1eddng t\u1ed3n t\u1ea1i \u1edf xung quanh b\u1ea5t k\u00ec d\u00f2ng \u0111i\u1ec7n n\u00e0o. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3089},{"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\u00e2y d\u1eabn mang d\u00f2ng \u0111i\u1ec7n kh\u00f4ng t\u01b0\u01a1ng t\u00e1c v\u1edbi:","select":["A. c\u00e1c \u0111i\u1ec7n t\u00edch chuy\u1ec3n \u0111\u1ed9ng.","B. nam ch\u00e2m \u0111\u1ee9ng y\u00ean.","C. c\u00e1c \u0111i\u1ec7n t\u00edch \u0111\u1ee9ng y\u00ean.","D. nam ch\u00e2m chuy\u1ec3n \u0111\u1ed9ng."],"hint":"","explain":"<span class='basic_left'>D\u00e2y d\u1eabn mang d\u00f2ng \u0111i\u1ec7n kh\u00f4ng t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c \u0111i\u1ec7n t\u00edch \u0111\u1ee9ng y\u00ean.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3090}],"lesson":{"save":0,"level":2}}