{"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":"S\u1eed d\u1ee5ng hi\u1ec7u \u0111i\u1ec7n th\u1ebf n\u00e0o d\u01b0\u1edbi \u0111\u00e2y c\u00f3 th\u1ec3 g\u00e2y nguy hi\u1ec3m \u0111\u1ed1i v\u1edbi c\u01a1 th\u1ec3 ng\u01b0\u1eddi?","select":["A. 6V.","B. 39V.","C. 12V.","D. 220V."],"hint":"","explain":"<span class='basic_left'>Quy t\u1eafc an to\u00e0n khi s\u1eed d\u1ee5ng \u0111i\u1ec7n \u0111\u00e3 h\u1ecdc \u1edf l\u1edbp 7<br\/> Ch\u1ec9 l\u00e0m th\u00ed nghi\u1ec7m v\u1edbi hi\u1ec7u \u0111i\u1ec7n th\u1ebf d\u01b0\u1edbi 40V.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3011},{"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":"Vi\u1ec7c l\u00e0m n\u00e0o d\u01b0\u1edbi \u0111\u00e2y l\u00e0 an to\u00e0n khi s\u1eed d\u1ee5ng \u0111i\u1ec7n?","select":["A. M\u1eafc n\u1ed1i ti\u1ebfp c\u1ea7u ch\u00ec lo\u1ea1i b\u1ea5t k\u00ec cho m\u1ed7i d\u1ee5ng c\u1ee5 \u0111i\u1ec7n.","B. S\u1eed d\u1ee5ng d\u00e2y d\u1eabn kh\u00f4ng c\u00f3 v\u1ecf b\u1ecdc c\u00e1ch \u0111i\u1ec7n.","C. L\u00e0m th\u00ed nghi\u1ec7m v\u1edbi ngu\u1ed3n \u0111i\u1ec7n c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf 45V.","D. R\u00fat ph\u00edch c\u1eafm \u0111\u00e8n b\u00e0n ra kh\u1ecfi \u1ed5 l\u1ea5y \u0111i\u1ec7n khi thay b\u00f3ng \u0111\u00e8n."],"hint":"","explain":"<span class='basic_left'>M\u1ed9t s\u1ed1 quy t\u1eafc an to\u00e0n kh\u00e1c khi s\u1eed d\u1ee5ng \u0111i\u1ec7n:<br\/>Khi s\u1eeda ch\u1eefa \u0111i\u1ec7n c\u1ea7n ng\u1eaft \u0111i\u1ec7n v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1ch \u0111i\u1ec7n gi\u1eefa ng\u01b0\u1eddi v\u00e0 nh\u00e0.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3012},{"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":"C\u1ea7n ph\u1ea3i s\u1eed d\u1ee5ng ti\u1ebft ki\u1ec7m \u0111i\u1ec7n n\u0103ng v\u00ec:","select":["A. D\u00f9ng nhi\u1ec1u \u0111i\u1ec7n \u1edf gia \u0111\u00ecnh d\u1ec5 g\u00e2y \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng.","B. D\u00f9ng nhi\u1ec1u \u0111i\u1ec7n d\u1ec5 g\u00e2y tai n\u1ea1n nguy hi\u1ec3m t\u1edbi t\u00ednh m\u1ea1ng con ng\u01b0\u1eddi.","C. Nh\u01b0 v\u1eady s\u1ebd gi\u1ea3m b\u1edbt chi ph\u00ed cho gia \u0111\u00ecnh v\u00e0 d\u00e0nh nhi\u1ec1u \u0111i\u1ec7n n\u0103ng cho s\u1ea3n xu\u1ea5t.","D. C\u00e0ng d\u00f9ng nhi\u1ec1u \u0111i\u1ec7n th\u00ec t\u1ed5n hao v\u00f4 \u00edch c\u00e0ng l\u1edbn v\u00e0 c\u00e0ng t\u1ed1n k\u00e9m cho gia \u0111\u00ecnh v\u00e0 cho x\u00e3 h\u1ed9i."],"hint":"","explain":"<span class='basic_left'>C\u1ea7n ph\u1ea3i s\u1eed d\u1ee5ng ti\u1ebft ki\u1ec7m \u0111i\u1ec7n n\u0103ng v\u00ec:<br\/>Nh\u01b0 v\u1eady s\u1ebd gi\u1ea3m b\u1edbt chi ph\u00ed cho gia \u0111\u00ecnh v\u00e0 d\u00e0nh nhi\u1ec1u \u0111i\u1ec7n n\u0103ng cho s\u1ea3n xu\u1ea5t.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3013},{"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":"S\u1eed d\u1ee5ng hi\u1ec7u \u0111i\u1ec7n th\u1ebf n\u00e0o d\u01b0\u1edbi \u0111\u00e2y khi l\u00e0m th\u00ed nghi\u1ec7m l\u00e0 an to\u00e0n \u0111\u1ed1i v\u1edbi c\u01a1 th\u1ec3 ng\u01b0\u1eddi.","select":["A. Nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng 40V.","B. Nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng 50V.","C. Nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng 60V.","D. Nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng 70V."],"hint":"","explain":"<span class='basic_left'>S\u1eed d\u1ee5ng hi\u1ec7u \u0111i\u1ec7n th\u1ebf khi l\u00e0m th\u00ed nghi\u1ec7m l\u00e0 an to\u00e0n \u0111\u1ed1i v\u1edbi c\u01a1 th\u1ec3 ng\u01b0\u1eddi: <br\/>Nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng 40V.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3014},{"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 v\u1ecf kim lo\u1ea1i c\u1ee7a d\u1ee5ng c\u1ee5 hay thi\u1ebft b\u1ecb \u0111i\u1ec7n b\u1eb1ng d\u00e2y d\u1eabn v\u1edbi \u0111\u1ea5t s\u1ebd \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00ec:","select":["A. Lu\u00f4n c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua v\u1ecf kim lo\u1ea1i c\u1ee7a d\u1ee5ng c\u1ee5 hay thi\u1ebft b\u1ecb \u0111i\u1ec7n n\u00e0y xu\u1ed1ng \u0111\u1ea5t.","B. D\u00f2ng \u0111i\u1ec7n kh\u00f4ng khi n\u00e0o ch\u1ea1y qua v\u1ecf kim lo\u1ea1i c\u1ee7a d\u1ee5ng c\u1ee5 hay thi\u1ebft b\u1ecb \u0111i\u1ec7n n\u00e0y.","C. Hi\u1ec7u \u0111i\u1ec7n th\u1ebf lu\u00f4n \u1ed5n \u0111\u1ecbnh \u0111\u1ec3 d\u1ee5ng c\u1ee5 hay thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.","D. N\u1ebfu c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi khi ch\u1ea1m v\u00e0o v\u1ecf kim lo\u1ea1i th\u00ec c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n n\u00e0y r\u1ea5t nh\u1ecf."],"hint":"","explain":"<span class='basic_left'>N\u1ed1i v\u1ecf kim lo\u1ea1i c\u1ee7a d\u1ee5ng c\u1ee5 hay thi\u1ebft b\u1ecb \u0111i\u1ec7n b\u1eb1ng d\u00e2y d\u1eabn v\u1edbi \u0111\u1ea5t s\u1ebd \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00ec: <br\/>N\u1ebfu c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi khi ch\u1ea1m v\u00e0o v\u1ecf kim lo\u1ea1i th\u00ec c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n n\u00e0y r\u1ea5t nh\u1ecf.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3015},{"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 s\u1eed d\u1ee5ng n\u00e0o d\u01b0\u1edbi \u0111\u00e2y l\u00e0 ti\u1ebft ki\u1ec7m \u0111i\u1ec7n n\u0103ng? ","select":["A. S\u1eed d\u1ee5ng \u0111\u00e8n b\u00e0n c\u00f4ng su\u1ea5t 100W.","B. S\u1eed d\u1ee5ng m\u1ed7i thi\u1ebft b\u1ecb \u0111i\u1ec7n khi c\u1ea7n thi\u1ebft.","C. Cho qu\u1ea1t ch\u1ea1y khi m\u1ecdi ngu\u1eddi \u0111i kh\u1ecfi nh\u00e0.","D. B\u1eadt s\u00e1ng t\u1ea5t c\u1ea3 c\u00e1c \u0111\u00e8n trong nh\u00e0 su\u1ed1t \u0111\u00eam."],"hint":"","explain":"<span class='basic_left'>S\u1eed d\u1ee5ng m\u1ed7i thi\u1ebft b\u1ecb \u0111i\u1ec7n khi c\u1ea7n thi\u1ebft gi\u00fap g\u00f3p ph\u1ea7n ti\u1ebft ki\u1ec7m \u0111i\u1ec7n cho gia \u0111\u00ecnh, cho \u0111\u1ea5t n\u01b0\u1edbc v\u00e0 b\u1ea3o v\u1ec7 t\u00e0i nguy\u00ean thi\u00ean nhi\u00ean. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3016},{"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 c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 n\u00e0o d\u01b0\u1edbi \u0111\u00e2y n\u1ebfu \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi l\u00e0 nguy hi\u1ec3m","select":["A. 40mA.","B. 50mA.","C. 60mA.","D. 70mA."],"hint":"","explain":"<span class='basic_left'>D\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb 70mA tr\u1edf l\u00ean \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi l\u00e0 nguy hi\u1ec3m. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3017},{"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":"Vi\u1ec7c l\u00e0m n\u00e0o d\u01b0\u1edbi \u0111\u00e2y l\u00e0 kh\u00f4ng an to\u00e0n khi s\u1eed d\u1ee5ng \u0111i\u1ec7n? ","select":["A. Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c d\u00e2y d\u1eabn c\u00f3 v\u1ecf b\u1ecdc c\u00e1ch \u0111i\u1ec7n.","B. Ph\u01a1i qu\u1ea7n \u00e1o l\u00ean d\u00e2y d\u1eabn \u0111i\u1ec7n c\u1ee7a gia \u0111\u00ecnh.","C. S\u1eed d\u1ee5ng hi\u1ec7u \u0111i\u1ec7n th\u1ebf 12V \u0111\u1ec3 l\u00e0m c\u00e1c th\u00ed nghi\u1ec7m \u0111i\u1ec7n.","D. M\u1eafc c\u1ea7u ch\u00ec th\u00edch h\u1ee3p cho m\u1ed7i thi\u1ebft b\u1ecb \u0111i\u1ec7n."],"hint":"","explain":"<span class='basic_left'>Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c ph\u01a1i qu\u1ea7n \u00e1o l\u00ean d\u00e2y d\u1eabn \u0111i\u1ec7n c\u1ee7a gia \u0111\u00ecnh, v\u00ed n\u00f3 r\u1ea5t nguy hi\u1ec3m. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3018},{"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":"S\u1eed d\u1ee5ng ti\u1ebft ki\u1ec7m \u0111i\u1ec7n n\u0103ng kh\u00f4ng mang l\u1ea1i l\u1ee3i \u00edch n\u00e0o d\u01b0\u1edbi \u0111\u00e2y? ","select":["A. G\u00f3p ph\u1ea7n l\u00e0m gi\u1ea3m \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng.","B. G\u00f3p ph\u1ea7n ph\u00e1t tri\u1ec3n s\u1ea3n xu\u1ea5t.","C. G\u00f3p ph\u1ea7n ch\u1eefa c\u00e1c b\u1ec7nh hi\u1ec3m ngh\u00e8o.","D. G\u00f3p ph\u1ea7n l\u00e0m gi\u1ea3m b\u1edbt c\u00e1c s\u1ef1 c\u1ed1 v\u1ec1 \u0111i\u1ec7n."],"hint":"","explain":"<span class='basic_left'>S\u1eed d\u1ee5ng ti\u1ebft ki\u1ec7m \u0111i\u1ec7n n\u0103ng g\u00f3p ph\u1ea7n l\u00e0m gi\u1ea3m \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng, g\u00f3p ph\u1ea7n ph\u00e1t tri\u1ec3n s\u1ea3n xu\u1ea5t, g\u00f3p ph\u1ea7n l\u00e0m gi\u1ea3m b\u1edbt c\u00e1c s\u1ef1 c\u1ed1 v\u1ec1 \u0111i\u1ec7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3019},{"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":"S\u1eed d\u1ee5ng lo\u1ea1i \u0111\u00e8n n\u00e0o d\u01b0\u1edbi \u0111\u00e2y s\u1ebd ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng nhi\u1ec1u nh\u1ea5t? ","select":["A. \u0110\u00e8n compac.","B. \u0110\u00e8n d\u00e2y t\u00f3c n\u00f3ng s\u00e1ng.","C. \u0110\u00e8n LED (\u0110i\u1ed1t ph\u00e1t quang).","D. \u0110\u00e8n \u1ed1ng (\u0111\u00e8n hu\u1ef3nh quang)."],"hint":"","explain":"<span class='basic_left'>\u0110\u00e8n d\u00e2y t\u00f3c n\u00f3ng s\u00e1ng s\u1ebd ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng nhi\u1ec1u nh\u1ea5t.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3020},{"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 l\u00e0m th\u00ed nghi\u1ec7m v\u1edbi hi\u1ec7u \u0111i\u1ec7n th\u1ebf m\u1ed9t chi\u1ec1u d\u01b0\u1edbi 40V th\u00ec : ","select":["A. D\u00f2ng \u0111i\u1ec7n kh\u00f4ng khi n\u00e0o \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi. ","B. D\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi nh\u01b0ng kh\u00f4ng g\u00e2y nguy hi\u1ec3m. ","C. D\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi v\u00e0 g\u00e2y nguy hi\u1ec3m. ","D. C\u1ea3 3 ph\u01b0\u01a1ng \u00e1n tr\u00ean \u0111\u1ec1u \u0111\u00fang."],"hint":"","explain":"<span class='basic_left'>Khi l\u00e0m th\u00ed nghi\u1ec7m v\u1edbi hi\u1ec7u \u0111i\u1ec7n th\u1ebf m\u1ed9t chi\u1ec1u d\u01b0\u1edbi 40V th\u00ec d\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi nh\u01b0ng kh\u00f4ng g\u00e2y nguy hi\u1ec3m. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3021},{"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":"C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n tr\u00ean 70mA qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi s\u1ebd g\u00e2y ra: ","select":["A. Co gi\u1eadt c\u00e1c c\u01a1.","B. L\u00e0m t\u1ed5n th\u01b0\u01a1ng tim.","C. L\u00e0m tim ng\u1eebng \u0111\u1eadp.","D. T\u1ea5t c\u1ea3 \u0111\u1ec1u sai."],"hint":"","explain":"<span class='basic_left'>C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n tr\u00ean 70mA qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi s\u1ebd g\u00e2y ra ng\u1eebng \u0111\u1eadp cho tim. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3022},{"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":"Vi\u1ec7c l\u00e0m n\u00e0o d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ea3m b\u1ea3o an to\u00e0n \u0111\u1ed1i v\u1edbi h\u1ecdc sinh khi s\u1eed d\u1ee5ng \u0111i\u1ec7n ?","select":["A. Ph\u01a1i qu\u1ea7n \u00e1o l\u00ean d\u00e2y \u0111i\u1ec7n.","B. L\u00e0m th\u00ed nghi\u1ec7m v\u1edbi d\u00e2y d\u1eabn c\u00f3 v\u1ecf b\u1ecdc c\u00e1ch \u0111i\u1ec7n .","C. T\u1ef1 m\u00ecnh s\u1eeda ch\u1eefa m\u1ea1ng \u0111i\u1ec7n gia \u0111\u00ecnh.","D. Ch\u01a1i th\u1ea3 di\u1ec1u g\u1ea7n \u0111\u01b0\u1eddng d\u00e2y t\u1ea3i \u0111i\u1ec7n."],"hint":"","explain":"<span class='basic_left'>L\u00e0m th\u00ed nghi\u1ec7m v\u1edbi d\u00e2y d\u1eabn c\u00f3 v\u1ecf b\u1ecdc c\u00e1ch \u0111i\u1ec7n \u0111\u1ea3m b\u1ea3o an to\u00e0n \u0111\u1ed1i v\u1edbi h\u1ecdc sinh khi s\u1eed d\u1ee5ng \u0111i\u1ec7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3023},{"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":"Vi\u1ec7c l\u00e0m n\u00e0o d\u01b0\u1edbi \u0111\u00e2y kh\u00f4ng \u0111\u1ea3m b\u1ea3o an to\u00e0n \u0111\u1ed1i v\u1edbi h\u1ecdc sinh khi s\u1eed d\u1ee5ng \u0111i\u1ec7n ?","select":["A. L\u00e0m th\u00ed nghi\u1ec7m v\u1edbi d\u00e2y d\u1eabn c\u00f3 v\u1ecf b\u1ecdc c\u00e1ch \u0111i\u1ec7n.","B. L\u1eafp c\u1ea7u ch\u00ec ph\u00f9 h\u1ee3p cho m\u1ed7i thi\u1ebft b\u1ecb \u0111i\u1ec7n.","C. L\u00e0m th\u00ed nghi\u1ec7m v\u1edbi pin ho\u1eb7c acquy.","D. T\u1ef1 m\u00ecnh s\u1eeda ch\u1eefa m\u1ea1ng \u0111i\u1ec7n gia \u0111\u00ecnh."],"hint":"","explain":"<span class='basic_left'>Kh\u00f4ng \u0111\u01b0\u1ee3c t\u1ef1 m\u00ecnh s\u1eeda ch\u1eefa m\u1ea1ng \u0111i\u1ec7n gia \u0111\u00ecnh v\u00ec kh\u00f4ng \u0111\u1ea3m b\u1ea3o an to\u00e0n \u0111\u1ed1i v\u1edbi h\u1ecdc sinh khi s\u1eed d\u1ee5ng \u0111i\u1ec7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3024},{"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":"V\u00ec l\u00ed do n\u00e0o d\u01b0\u1edbi \u0111\u00e2y m\u00e0 c\u00e1c d\u1ee5ng c\u1ee5 \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 s\u1eeda ch\u1eefa \u0111i\u1ec7n nh\u01b0 k\u00ecm, tuavit\u2026 \u0111\u1ec1u c\u00f3 c\u00e1n \u0111\u01b0\u1ee3c b\u1ecdc nh\u1ef1a hay cao su? ","select":["A. Cao su, nh\u1ef1a l\u00e0m cho tay c\u1ea7m kh\u00f4ng b\u1ecb n\u00f3ng.","B. Cao su, nh\u1ef1a \u0111\u1ec1u l\u00e0 ch\u1ea5t c\u00e1ch \u0111i\u1ec7n n\u00ean tr\u00e1nh kh\u00f4ng cho d\u00f2ng \u0111i\u1ec7n truy\u1ec1n v\u00e0o c\u01a1 th\u1ec3 ng\u01b0\u1eddi.","C. Cao su, nh\u1ef1a l\u00e0m cho tay ta kh\u00f4ng b\u1ecb d\u00f2ng \u0111i\u1ec7n h\u00fat v\u00e0o.","D. Cao su, nh\u1ef1a gi\u00fap cho tay ta c\u1ea7m c\u00e1c d\u1ee5ng c\u1ee5 n\u00e0y ch\u1eafc h\u01a1n, kh\u00f4ng b\u1ecb tu\u1ed9t."],"hint":"","explain":"<span class='basic_left'>Cao su, nh\u1ef1a \u0111\u1ec1u l\u00e0 ch\u1ea5t c\u00e1ch \u0111i\u1ec7n n\u00ean tr\u00e1nh kh\u00f4ng cho d\u00f2ng \u0111i\u1ec7n truy\u1ec1n v\u00e0o c\u01a1 th\u1ec3 ng\u01b0\u1eddi n\u00ean c\u00e1c d\u1ee5ng c\u1ee5 \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 s\u1eeda ch\u1eefa \u0111i\u1ec7n nh\u01b0 k\u00ecm, tuavit\u2026 \u0111\u1ec1u c\u00f3 c\u00e1n \u0111\u01b0\u1ee3c b\u1ecdc nh\u1ef1a hay cao su.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3025},{"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 h\u1ec7 th\u1ed1ng \u0111\u00e8n chi\u1ebfu s\u00e1ng c\u1ee7a m\u1ed9t con \u0111\u01b0\u1eddng trong th\u00e0nh ph\u1ed1 c\u00f3 200 b\u00f3ng \u0111\u00e8n gi\u1ed1ng nhau. N\u1ebfu m\u1ed7i ng\u00e0y ti\u1ebft ki\u1ec7m 30 ph\u00fat chi\u1ebfu s\u00e1ng th\u00ec l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng ti\u1ebft ki\u1ec7m trong ng\u00e0y l\u00e0 bao nhi\u00eau kWh? Bi\u1ebft c\u00f4ng su\u1ea5t m\u1ed7i b\u00f3ng l\u00e0 400W.","select":["A. 120kWh.","B. 80kWh.","C. 40kWh.","D. 60kWh."],"hint":"","explain":"<span class='basic_left'>L\u01b0\u1ee3ng \u0111i\u1ec7n t\u0103ng ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c l\u00e0: $A=200\\times 0,5\\times 400=40000Wh=40kWh$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3026},{"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":"Nh\u1eefng d\u1ee5ng c\u1ee5 \u0111\u1ed1t n\u00f3ng b\u1eb1ng \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean t\u00e1c d\u1ee5ng n\u00e0o sau \u0111\u00e2y c\u1ee7a d\u00f2ng \u0111i\u1ec7n?","select":["A. T\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n.","B. T\u00e1c d\u1ee5ng h\u00f3a h\u1ecdc c\u1ee7a d\u00f2ng \u0111i\u1ec7n.","C. T\u00e1c d\u1ee5ng nhi\u1ec7t c\u1ee7a d\u00f2ng \u0111i\u1ec7n.","D. T\u00e1c d\u1ee5ng sinh l\u00ed c\u1ee7a d\u00f2ng \u0111i\u1ec7n."],"hint":"","explain":"<span class='basic_left'>Nh\u1eefng d\u1ee5ng c\u1ee5 \u0111\u1ed1t n\u00f3ng b\u1eb1ng \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean t\u00e1c d\u1ee5ng nhi\u1ec7t c\u1ee7a d\u00f2ng \u0111i\u1ec7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3027},{"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 g\u1eb7p m\u1ed9t ng\u01b0\u1eddi \u0111ang b\u1ecb tai n\u1ea1n v\u1ec1 \u0111i\u1ec7n, c\u00f4ng vi\u1ec7c \u0111\u1ea7u ti\u00ean ta ph\u1ea3i l\u00e0m g\u00ec ?","select":["A. C\u1ea7m tay k\u00e9o n\u1ea1n nh\u00e2n ra kh\u1ecfi d\u00f2ng \u0111i\u1ec7n.","B. D\u00f9ng v\u1eadt l\u00f3t c\u00e1ch \u0111i\u1ec7n (c\u00e2y kh\u00f4, gi\u1ebb kh\u00f4 ...) t\u00e1ch n\u1ea1n nh\u00e2n ra kh\u1ecfi d\u00f2ng \u0111i\u1ec7n.","C. G\u1ecdi b\u1ec7nh vi\u1ec7n \u0111\u1ebfn c\u1ea5p c\u1ee9u.","D. G\u1ecdi ng\u01b0\u1eddi kh\u00e1c \u0111\u1ebfn c\u00f9ng gi\u00fap."],"hint":"","explain":"<span class='basic_left'>Khi g\u1eb7p m\u1ed9t ng\u01b0\u1eddi \u0111ang b\u1ecb tai n\u1ea1n v\u1ec1 \u0111i\u1ec7n, c\u00f4ng vi\u1ec7c \u0111\u1ea7u ti\u00ean ta ph\u1ea3i d\u00f9ng v\u1eadt l\u00f3t c\u00e1ch \u0111i\u1ec7n (c\u00e2y kh\u00f4, gi\u1ebb kh\u00f4 ...) t\u00e1ch n\u1ea1n nh\u00e2n ra kh\u1ecfi d\u00f2ng \u0111i\u1ec7n, ng\u1eaft ngay m\u1ea1ch \u0111i\u1ec7n. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3028},{"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":"Khi d\u00e2y ch\u00ec trong c\u1ea7u ch\u00ec b\u1ecb \u0111\u1ee9t, ta ph\u1ea3i l\u00e0m g\u00ec?","select":["A. Thay b\u1eb1ng d\u00e2y nh\u00f4m.","B. Thay b\u1eb1ng d\u00e2y \u0111\u1ed3ng.","C. Thay d\u00e2y ch\u00ec m\u1edbi c\u00f3 ti\u1ebft di\u1ec7n ph\u00f9 h\u1ee3p.","D. Thay d\u00e2y ch\u00ec kh\u00e1c c\u00f3 ti\u1ebft di\u1ec7n to h\u01a1n."],"hint":"","explain":"<span class='basic_left'>Khi d\u00e2y ch\u00ec trong c\u1ea7u ch\u00ec b\u1ecb \u0111\u1ee9t, ta ph\u1ea3i ng\u1eaft m\u1ea1ch \u0111i\u1ec7n v\u00e0 thay d\u00e2y ch\u00ec m\u1edbi c\u00f3 ti\u1ebft di\u1ec7n ph\u00f9 h\u1ee3p. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3029},{"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/bai19/lv2/img\/h20.jpg'\/><\/center>Quan s\u00e1t c\u00e1c s\u01a1 \u0111\u1ed3 v\u1ebd sau \u0111\u00e2y, h\u00e3y cho bi\u1ebft s\u01a1 \u0111\u1ed3 n\u00e0o c\u00f3 c\u1ea7u ch\u00ec v\u00e0 c\u00f4ng t\u1eafc m\u1eafc \u0111\u00fang?","select":["A. S\u01a1 \u0111\u1ed3 c.","B. S\u01a1 \u0111\u1ed3 a.","C. S\u01a1 \u0111\u1ed3 b.","D. S\u01a1 \u0111\u1ed3 d."],"hint":"","explain":"<span class='basic_left'>C\u1ea7u ch\u00ec v\u00e0 c\u00f4ng t\u1eafc ph\u1ea3i \u0111\u01b0\u1ee3c m\u1eafc v\u00e0o ph\u00eda \u0111\u1ea7u m\u1ea1ch \u0111i\u1ec7n g\u1ea7n d\u00e2y pha. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3030}],"lesson":{"save":0,"level":2}}