{"segment":[{"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":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/vatly/bai35/lv2/img\/1.jpg'\/><\/center>Trong th\u00ed nghi\u1ec7m \u1edf h\u00ecnh sau, c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng g\u00ec x\u1ea3y ra v\u1edbi kim nam ch\u00e2m khi ta \u0111\u1ed5i chi\u1ec1u d\u00f2ng \u0111i\u1ec7n ch\u1ea1y v\u00e0o nam ch\u00e2m \u0111i\u1ec7n ? ","select":["A. Kim nam ch\u00e2m v\u1eabn \u0111\u1ee9ng y\u00ean.","B. Kim nam ch\u00e2m quay m\u1ed9t g\u00f3c $90{}^\\circ $ .","C. Kim nam ch\u00e2m quay ng\u01b0\u1ee3c l\u1ea1i.","D. Kim nam ch\u00e2m b\u1ecb \u0111\u1ea9y ra."],"hint":"","explain":"<span class='basic_left'>Trong th\u00ed nghi\u1ec7m \u1edf h\u00ecnh tr\u00ean, c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng kim nam ch\u00e2m quay ng\u01b0\u1ee3c l\u1ea1i khi ta \u0111\u1ed5i chi\u1ec1u d\u00f2ng \u0111i\u1ec7n ch\u1ea1y v\u00e0o 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":3311},{"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/bai35/lv2/img\/2.jpg'\/><\/center>Trong th\u00ed nghi\u1ec7m \u1edf h\u00ecnh sau, c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng g\u00ec x\u1ea3y ra v\u1edbi kim s\u1eaft khi ta \u0111\u1ed5i chi\u1ec1u d\u00f2ng \u0111i\u1ec7n ch\u1ea1y v\u00e0o nam ch\u00e2m \u0111i\u1ec7n ? ","select":["A. Kim s\u1eaft v\u1eabn b\u1ecb h\u00fat nh\u01b0 tr\u01b0\u1edbc.","B. Kim s\u1eaft quay m\u1ed9t g\u00f3c $90{}^\\circ $ .","C. Khi s\u1eaft quay ng\u01b0\u1ee3c l\u1ea1i.","D. Kim s\u1eaft b\u1ecb \u0111\u1ea9y ra."],"hint":"","explain":"<span class='basic_left'>Trong th\u00ed nghi\u1ec7m \u1edf h\u00ecnh tr\u00ean, c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng kim s\u1eaft v\u1eabn b\u1ecb h\u00fat nh\u01b0 tr\u01b0\u1edbc khi ta \u0111\u1ed5i chi\u1ec1u d\u00f2ng \u0111i\u1ec7n ch\u1ea1y v\u00e0o nam ch\u00e2m \u0111i\u1ec7n <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3312},{"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/bai35/lv2/img\/3.jpg'\/><\/center> C\u00f3 hi\u1ec7n t\u01b0\u1ee3ng g\u00ec x\u1ea3y ra v\u1edbi mi\u1ebfng nam ch\u00e2m khi cho d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ch\u1ea1y v\u00e0o nam ch\u00e2m \u0111i\u1ec7n \u1edf h\u00ecnh sau ? ","select":["A. Mi\u1ebfng nam ch\u00e2m b\u1ecb nam ch\u00e2m \u0111i\u1ec7n h\u00fat ch\u1eb7t.","B. Mi\u1ebfng nam ch\u00e2m b\u1ecb nam ch\u00e2m \u0111i\u1ec7n \u0111\u1ea9y ra.","C. Mi\u1ebfng nam ch\u00e2m \u0111\u1ee9ng y\u00ean, kh\u00f4ng b\u1ecb h\u00fat, kh\u00f4ng b\u1ecb \u0111\u1ea9y.","D. Mi\u1ebfng nam ch\u00e2m lu\u00e2n phi\u00ean b\u1ecb nam ch\u00e2m \u0111i\u1ec7n h\u00fat, \u0111\u1ea9y."],"hint":"","explain":"<span class='basic_left'>C\u00f3 hi\u1ec7n t\u01b0\u1ee3ng Mi\u1ebfng nam ch\u00e2m lu\u00e2n phi\u00ean b\u1ecb nam ch\u00e2m \u0111i\u1ec7n h\u00fat, \u0111\u1ea9y khi cho d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ch\u1ea1y v\u00e0o nam ch\u00e2m \u0111i\u1ec7n \u1edf h\u00ecnh tr\u00ean.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3313},{"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":" T\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n thay \u0111\u1ed5i nh\u01b0 th\u1ebf n\u00e0o khi d\u00f2ng \u0111i\u1ec7n \u0111\u1ed5i chi\u1ec1u?","select":["A. Kh\u00f4ng c\u00f2n t\u00e1c d\u1ee5ng t\u1eeb.","B. T\u00e1c d\u1ee5ng t\u1eeb m\u1ea1nh l\u00ean g\u1ea5p \u0111\u00f4i.","C. T\u00e1c d\u1ee5ng t\u1eeb gi\u1ea3m \u0111i.","D. L\u1ef1c t\u1eeb \u0111\u1ed5i chi\u1ec1u."],"hint":"","explain":"<span class='basic_left'>T\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n thay \u0111\u1ed5i L\u1ef1c t\u1eeb \u0111\u1ed5i chi\u1ec1u khi d\u00f2ng \u0111i\u1ec7n \u0111\u1ed5i chi\u1ec1u<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3314},{"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 qua d\u1ee5ng c\u1ee5 n\u00e0o sau \u0111\u00e2y ch\u1ec9 g\u00e2y t\u00e1c d\u1ee5ng nhi\u1ec7t? ","select":["A. B\u00f3ng \u0111\u00e8n s\u1ee3i t\u00f3c.","B. M\u1ecf h\u00e0n \u0111i\u1ec7n.","C. Qu\u1ea1t \u0111i\u1ec7n.","D. M\u00e1y b\u01a1m n\u01b0\u1edbc"],"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":3315},{"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":" D\u00f9ng v\u00f4n k\u1ebf xoay chi\u1ec1u c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c ","select":["A. c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u.","B. c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u.","C. gi\u00e1 tr\u1ecb c\u1ef1c \u0111\u1ea1i c\u1ee7a hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u.","D. gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng c\u1ee7a hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u."],"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":3316},{"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\u1ec3 \u0111o c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u, ta m\u1eafc ampe k\u1ebf xoay chi\u1ec1u ","select":["A. n\u1ed1i ti\u1ebfp v\u00e0o m\u1ea1ch \u0111i\u1ec7n c\u1ea7n \u0111o m\u00e0 kh\u00f4ng c\u1ea7n ph\u00e2n bi\u1ec7t ch\u1ed1t c\u1ee7a ch\u00fang.","B. n\u1ed1i ti\u1ebfp v\u00e0o m\u1ea1ch c\u1ea7n \u0111o sao cho d\u00f2ng \u0111i\u1ec7n c\u00f3 chi\u1ec1u \u0111i v\u00e0o ch\u1ed1t d\u01b0\u01a1ng v\u00e0 \u0111i ra ch\u1ed1t \u00e2m c\u1ee7a ampe k\u1ebf.","C. song song v\u00e0o m\u1ea1ch \u0111i\u1ec7n c\u1ea7n \u0111o m\u00e0 kh\u00f4ng c\u1ea7n ph\u00e2n bi\u1ec7t ch\u1ed1t c\u1ee7a ch\u00fang.","D. song song v\u00e0o m\u1ea1ch \u0111i\u1ec7n c\u1ea7n \u0111o sao cho d\u00f2ng \u0111i\u1ec7n c\u00f3 chi\u1ec1u \u0111i v\u00e0o ch\u1ed1t d\u01b0\u01a1ng v\u00e0 \u0111i ra ch\u1ed1t \u00e2m c\u1ee7a ampe k\u1ebf."],"hint":"","explain":"<span class='basic_left'>\u0110\u1ec3 \u0111o c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u, ta m\u1eafc ampe k\u1ebf xoay chi\u1ec1u n\u1ed1i ti\u1ebfp v\u00e0o m\u1ea1ch \u0111i\u1ec7n c\u1ea7n \u0111o m\u00e0 kh\u00f4ng c\u1ea7n ph\u00e2n bi\u1ec7t ch\u1ed1t c\u1ee7a ch\u00fang.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3317},{"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":"\u0110\u1ec3 \u0111o hi\u1ec7u \u0111i\u1ec7n th\u1ebf c\u1ee7a d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u, ta m\u1eafc v\u00f4n k\u1ebf xoay chi\u1ec1u ","select":["A. n\u1ed1i ti\u1ebfp v\u1edbi m\u1ea1ch \u0111i\u1ec7n c\u1ea7n \u0111o m\u00e0 kh\u00f4ng c\u1ea7n ph\u00e2n bi\u1ec7t ch\u1ed1t c\u1ee7a ch\u00fang.","B. n\u1ed1i ti\u1ebfp v\u1edbi m\u1ea1ch c\u1ea7n \u0111o sao cho d\u00f2ng \u0111i\u1ec7n c\u00f3 chi\u1ec1u \u0111i v\u00e0o ch\u1ed1t d\u01b0\u01a1ng v\u00e0 \u0111i ra ch\u1ed1t \u00e2m c\u1ee7a v\u00f4n k\u1ebf.","C. song song v\u1edbi m\u1ea1ch \u0111i\u1ec7n c\u1ea7n \u0111o m\u00e0 kh\u00f4ng c\u1ea7n ph\u00e2n bi\u1ec7t ch\u1ed1t c\u1ee7a ch\u00fang.","D. song song v\u1edbi m\u1ea1ch c\u1ea7n \u0111o sao cho d\u00f2ng \u0111i\u1ec7n c\u00f3 chi\u1ec1u \u0111i v\u00e0o ch\u1ed1t d\u01b0\u01a1ng v\u00e0 \u0111i ra ch\u1ed1t \u00e2m c\u1ee7a v\u00f4n k\u1ebf."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3318},{"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":"D\u00f9ng ampe k\u1ebf xoay chi\u1ec1u c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c ","select":["A. gi\u00e1 tr\u1ecb c\u1ef1c \u0111\u1ea1i c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u.","B. gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng c\u1ee7a hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u.","C. gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u.","D. gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u."],"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":3319},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Ph\u00e1t bi\u1ec3u kh\u00f4ng \u0111\u00fang khi so s\u00e1nh t\u00e1c d\u1ee5ng c\u1ee7a d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u v\u00e0 d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u? D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u v\u00e0 d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u \u0111\u1ec1u","select":["A. c\u00f3 kh\u1ea3 n\u0103ng tr\u1ef1c ti\u1ebfp n\u1ea1p \u0111i\u1ec7n cho \u0103cquy.","B. t\u1ecfa nhi\u1ec7t khi ch\u1ea1y qua m\u1ed9t d\u00e2y d\u1eabn.","C. c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m b\u00f3ng \u0111\u00e8n ph\u00e1t s\u00e1ng.","D. g\u00e2y ra 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 A.<\/span><\/span> ","column":1}]}],"id_ques":3320},{"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":"T\u00e1c d\u1ee5ng n\u00e0o c\u1ee7a d\u00f2ng \u0111i\u1ec7n ph\u1ee5 thu\u1ed9c v\u00e0o chi\u1ec1u c\u1ee7a d\u00f2ng \u0111i\u1ec7n? ","select":["A. T\u00e1c d\u1ee5ng nhi\u1ec7t.","B. T\u00e1c d\u1ee5ng t\u1eeb. ","C. T\u00e1c d\u1ee5ng quang.","D. T\u00e1c d\u1ee5ng sinh l\u00ed."],"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":3321},{"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 b\u00f3ng \u0111\u00e8n lo\u1ea1i 12V \u2013 6W \u0111\u01b0\u1ee3c m\u1eafc v\u00e0o m\u1ea1ch \u0111i\u1ec7n m\u1ed9t chi\u1ec1u th\u00ec \u0111\u00e8n s\u00e1ng b\u00ecnh th\u01b0\u1eddng. N\u1ebfu m\u1eafc \u0111\u00e8n v\u00e0o m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u m\u00e0 \u0111\u00e8n v\u1eabn s\u00e1ng nh\u01b0 tr\u01b0\u1edbc, khi \u0111\u00f3 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n qua \u0111\u00e8n co\u0301 gia\u0301 tri\u0323 ","select":["A. 2A.","B. 1A.","C. 0,5A.","D. 0,1A."],"hint":"","explain":"<span class='basic_left'>C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n qua \u0111\u00e8n: $I=\\dfrac{\\wp }{U}=\\dfrac{6}{12}=0,5W$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3322},{"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 b\u00f3ng \u0111\u00e8n c\u00f3 ghi 12V\u2013 6W l\u1ea7n l\u01b0\u1ee3t \u0111\u01b0\u1ee3c m\u1eafc v\u00e0o m\u1ea1ch \u0111i\u1ec7n m\u1ed9t chi\u1ec1u, r\u1ed3i v\u00e0o m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 c\u00f9ng hi\u1ec7u \u0111i\u1ec7n th\u1ebf 12V th\u00ec \u0111\u1ed9 s\u00e1ng c\u1ee7a \u0111\u00e8n ","select":["A. \u1edf m\u1ea1ch \u0111i\u1ec7n m\u1ed9t chi\u1ec1u m\u1ea1nh h\u01a1n \u1edf m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u.","B. \u1edf m\u1ea1ch \u0111i\u1ec7n m\u1ed9t chi\u1ec1u y\u1ebfu h\u01a1n \u1edf m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u.","C. \u1edf c\u1ea3 hai m\u1ea1ch \u0111i\u1ec7n \u0111\u1ec1u nh\u01b0 nhau.","D. \u1edf m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 l\u00fac m\u1ea1nh c\u00f3 l\u00fac y\u1ebfu."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3323},{"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":" \u0110\u1ec3 \u0111o hi\u1ec7u \u0111i\u1ec7n th\u1ebf c\u1ee7a m\u1ea1ng \u0111i\u1ec7n d\u00f9ng trong gia \u0111\u00ecnh, ta c\u1ea7n ch\u1ecdn v\u00f4n k\u1ebf c\u00f3 gi\u1edbi h\u1ea1n \u0111o ","select":["A. nh\u1ecf h\u01a1n 220V, c\u00f3 k\u00ed hi\u1ec7u AC ","B. nh\u1ecf h\u01a1n 220V, c\u00f3 k\u00ed hi\u1ec7u DC (hay \u2013 ).","C. l\u1edbn h\u01a1n 220V, c\u00f3 k\u00ed hi\u1ec7u AC ","D. l\u1edbn h\u01a1n 220V, c\u00f3 k\u00ed hi\u1ec7u DC (hay \u2013 )."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3324},{"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":"S\u1eed d\u1ee5ng v\u00f4n k\u1ebf xoay chi\u1ec1u \u0111\u1ec3 \u0111o hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa hai l\u1ed7 c\u1ee7a \u1ed5 l\u1ea5y \u0111i\u1ec7n trong gia \u0111\u00ecnh th\u1ea5y v\u00f4n k\u1ebf ch\u1ec9 220V. N\u1ebfu \u0111\u1ed5i ch\u1ed7 hai \u0111\u1ea7u ph\u00edch c\u1eafm v\u00e0o \u1ed5 l\u1ea5y \u0111i\u1ec7n th\u00ec kim c\u1ee7a v\u00f4n k\u1ebf s\u1ebd ","select":["A. quay ng\u01b0\u1ee3c l\u1ea1i v\u00e0 ch\u1ec9 220V.","B. quay tr\u1edf v\u1ec1 s\u1ed1 0.","C. dao \u0111\u1ed9ng li\u00ean t\u1ee5c, kh\u00f4ng ch\u1ec9 m\u1ed9t gi\u00e1 tr\u1ecb x\u00e1c \u0111\u1ecbnh n\u00e0o.","D. v\u1eabn ch\u1ec9 gi\u00e1 tr\u1ecb c\u0169."],"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":3325},{"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":"D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 hi\u1ec7u \u0111i\u1ec7n th\u1ebf lu\u00f4n thay \u0111\u1ed5i theo th\u1eddi gian. V\u1eady ampe k\u1ebf xoay chi\u1ec1u ch\u1ec9 gi\u00e1 tr\u1ecb n\u00e0o c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ? ","select":["A. Gi\u00e1 tr\u1ecb c\u1ef1c \u0111\u1ea1i.","B. Gi\u00e1 tr\u1ecb c\u1ef1c ti\u1ec3u.","C. Gi\u00e1 tr\u1ecb trung b\u00ecnh.","D. Gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng."],"hint":"","explain":"<span class='basic_left'>D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 hi\u1ec7u \u0111i\u1ec7n th\u1ebf lu\u00f4n thay \u0111\u1ed5i theo th\u1eddi gian. V\u1eady ampe k\u1ebf xoay chi\u1ec1u ch\u1ec9 Gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3326},{"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\u00e1c thi\u1ebft b\u1ecb n\u00e0o sau \u0111\u00e2y kh\u00f4ng s\u1eed d\u1ee5ng d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ? ","select":["A . M\u00e1y thu thanh d\u00f9ng pin","B . B\u00f3ng \u0111\u00e8n d\u00e2y t\u00f3c m\u1eafc v\u00e0o \u0111i\u1ec7n nh\u00e0 220V","C . T\u1ee7 l\u1ea1nh","D . \u1ea4m \u0111un n\u01b0\u1edbc"],"hint":"","explain":"<span class='basic_left'>M\u00e1y thu thanh d\u00f9ng pin kh\u00f4ng s\u1eed d\u1ee5ng d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u v\u00ec pin l\u00e0 ngu\u1ed3n \u0111i\u1ec7n m\u1ed9t chi\u1ec1u <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3327},{"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":"Thi\u1ebft b\u1ecb n\u00e0o sau \u0111\u00e2y c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u0111\u1ed1i v\u1edbi d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u l\u1eabn d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u? ","select":["A. \u0110\u00e8n \u0111i\u1ec7n","B. M\u00e1y s\u1ea5y t\u00f3c","C. T\u1ee7 l\u1ea1nh","D. \u0110\u1ed3ng h\u1ed3 treo t\u01b0\u1eddng ch\u1ea1y b\u1eb1ng pin"],"hint":"","explain":"<span class='basic_left'>\u0110\u00e8n \u0111i\u1ec7n c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u0111\u1ed1i v\u1edbi d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u l\u1eabn 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":2}]}],"id_ques":3328},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"\u0110i\u1ec1u n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang khi so s\u00e1nh t\u00e1c d\u1ee5ng c\u1ee7a d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u v\u00e0 d\u00f2ng \u0111i\u1ec7n xoay chi\u00eau ?","select":["A . D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u v\u00e0 d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u \u0111\u1ec1u c\u00f3 kh\u1ea3 n\u0103ng tr\u1ef1c ti\u1ebfp n\u1ea1p \u0111i\u1ec7n cho \u1eafcquy.","B . D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u v\u00e0 d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u \u0111\u1ec1u to\u1ea3 ra nhi\u1ec7t khi ch\u1ea1y qua m\u1ed9t d\u00e2y d\u1eabn","C . D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u v\u00e0 d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u \u0111\u1ec1u c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m ph\u00e1t quang b\u00f3ng \u0111\u00e8n ","D. T\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>A sai v\u00ec: Kh\u00f4ng th\u1ec3 tr\u1ef1c ti\u1ebfp n\u1ea1p \u0111i\u1ec7n cho \u1eafcquy b\u1eb1ng d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u \u0111\u01b0\u1ee3c m\u00e0 ph\u1ea3i d\u00f9ng ch\u1ec9nh l\u01b0u. <br\/>B,C,D \u0111\u00fang<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3329},{"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":"Ch\u1ecdn ph\u00e1t bi\u1ec3u \u0111\u00fang v\u1ec1 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u : ","select":["A . D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 t\u00e1c d\u1ee5ng t\u1eeb y\u1ebfu h\u01a1n d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u ","B . D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 t\u00e1c d\u1ee5ng nhi\u1ec7t y\u1ebfu h\u01a1n d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u","C . D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 t\u00e1c d\u1ee5ng sinh l\u00fd m\u1ea1nh h\u01a1n d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u","D . D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u t\u00e1c d\u1ee5ng m\u1ed9t c\u00e1ch kh\u00f4ng li\u00ean t\u1ee5c"],"hint":"","explain":"<span class='basic_left'>A, B, C sai<br\/> D \u0111\u00fang v\u00ec d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 chi\u1ec1u lu\u00e2n phi\u00ean thay \u0111\u1ed5i. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3330}],"lesson":{"save":0,"level":2}}