{"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/bai23/lv2/img\/h1.jpg'\/><\/center>Tr\u00ean h\u00ecnh 23.5 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb n\u00e0o v\u1ebd sai? ","select":["A. \u0110\u01b0\u1eddng 1 .","B. \u0110\u01b0\u1eddng 2 .","C. \u0110\u01b0\u1eddng 3 .","D. \u0110\u01b0\u1eddng 4 ."],"hint":"","explain":"<span class='basic_left'>\u0110\u01b0\u1eddng s\u1ee9c t\u1eeb l\u00e0 nh\u1eefng \u0111\u01b0\u1eddng cong kh\u00e9p k\u00edn nh\u01b0ng ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo m\u1ed9t quy lu\u1eadt nh\u1ea5t \u0111\u1ecbnh. Do \u0111\u00e1p \u00e1n C \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb n\u00e0y kh\u00f4ng theo quy lu\u1eadt chung n\u00ean n\u00f3 sai<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3091},{"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\u1ed9 mau, th\u01b0a c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb tr\u00ean c\u00f9ng m\u1ed9t h\u00ecnh v\u1ebd cho ta bi\u1ebft \u0111i\u1ec1u g\u00ec v\u1ec1 t\u1eeb tr\u01b0\u1eddng?","select":["A. Ch\u1ed7 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u00e0ng mau th\u00ec t\u1eeb tr\u01b0\u1eddng c\u00e0ng y\u1ebfu, ch\u1ed7 c\u00e0ng th\u01b0a th\u00ec t\u1eeb tr\u01b0\u1eddng c\u00e0ng m\u1ea1nh.","B. Ch\u1ed7 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u00e0ng mau th\u00ec t\u1eeb tr\u01b0\u1eddng c\u00e0ng m\u1ea1nh, ch\u1ed7 c\u00e0ng th\u01b0a th\u00ec t\u1eeb tr\u01b0\u1eddng c\u00e0ng y\u1ebfu.","C. Ch\u1ed7 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u00e0ng th\u01b0a th\u00ec d\u00f2ng \u0111i\u1ec7n \u0111\u1eb7t \u1edf \u0111\u00f3 c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 c\u00e0ng l\u1edbn.","D. Ch\u1ed7 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u00e0ng mau th\u00ec d\u00e2y d\u1eabn \u0111\u1eb7t \u1edf \u0111\u00f3 c\u00e0ng b\u1ecb n\u00f3ng l\u00ean nhi\u1ec1u."],"hint":"","explain":"<span class='basic_left'>\u0110\u1ed9 mau, th\u01b0a c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb tr\u00ean c\u00f9ng m\u1ed9t h\u00ecnh v\u1ebd cho ta bi\u1ebft v\u1ec1 t\u1eeb tr\u01b0\u1eddng: Ch\u1ed7 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u00e0ng mau th\u00ec t\u1eeb tr\u01b0\u1eddng c\u00e0ng m\u1ea1nh, ch\u1ed7 c\u00e0ng th\u01b0a th\u00ec t\u1eeb tr\u01b0\u1eddng c\u00e0ng y\u1ebfu.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3092},{"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":"Chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb cho ta bi\u1ebft \u0111i\u1ec1u g\u00ec v\u1ec1 t\u1eeb tr\u01b0\u1eddng t\u1ea1i \u0111i\u1ec3m \u0111\u00f3?","select":["A. Chi\u1ec1u chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a thanh nam ch\u00e2m \u0111\u1eb7t \u1edf \u0111i\u1ec3m \u0111\u00f3.","B. H\u01b0\u1edbng c\u1ee7a l\u1ef1c t\u1eeb t\u00e1c d\u1ee5ng l\u00ean c\u1ef1c B\u1eafc c\u1ee7a m\u1ed9t kim nam ch\u00e2m \u0111\u1eb7t t\u1ea1i \u0111i\u1ec3m \u0111\u00f3.","C. H\u01b0\u1edbng c\u1ee7a l\u1ef1c t\u1eeb t\u00e1c d\u1ee5ng l\u00ean v\u1ee5n s\u1eaft \u0111\u1eb7t t\u1ea1i \u0111i\u1ec3m \u0111\u00f3.","D. H\u01b0\u1edbng c\u1ee7a d\u00f2ng \u0111i\u1ec7n trong d\u00e2y d\u1eabn \u0111\u1eb7t t\u1ea1i \u0111i\u1ec3m \u0111\u00f3."],"hint":"","explain":"<span class='basic_left'>Chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb cho ta bi\u1ebft v\u1ec1 t\u1eeb tr\u01b0\u1eddng t\u1ea1i \u0111i\u1ec3m \u0111\u00f3: H\u01b0\u1edbng c\u1ee7a l\u1ef1c t\u1eeb t\u00e1c d\u1ee5ng l\u00ean c\u1ef1c B\u1eafc c\u1ee7a m\u1ed9t kim nam ch\u00e2m \u0111\u1eb7t t\u1ea1i \u0111i\u1ec3m \u0111\u00f3.<br\/>Ta \u0111\u00e3 bi\u1ebft \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb ng\u01b0\u1eddi ta d\u1ef1a v\u00e0o s\u1ef1 s\u1eafp x\u1ebfp c\u1ee7a kim nam ch\u00e2m tr\u00ean \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3093},{"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":"\u0110\u01b0\u1eddng s\u1ee9c t\u1eeb l\u00e0 nh\u1eefng \u0111\u01b0\u1eddng cong \u0111\u01b0\u1ee3c v\u1ebd theo quy \u01b0\u1edbc sao cho:","select":["A. C\u00f3 chi\u1ec1u t\u1eeb c\u1ef1c Nam \u0111\u1ebfn c\u1ef1c B\u1eafc b\u00ean ngo\u00e0i thanh nam ch\u00e2m.","B. C\u00f3 \u0111\u1ed9 mau th\u01b0a t\u00f9y \u00fd.","C. B\u1eaft \u0111\u1ea7u t\u1eeb c\u1ef1c n\u00e0y v\u00e0 k\u1ebft th\u00fac \u1edf c\u1ef1c kia c\u1ee7a nam ch\u00e2m.","D. C\u00f3 chi\u1ec1u \u0111i t\u1eeb c\u1ef1c B\u1eafc \u0111\u1ebfn c\u1ef1c Nam c\u1ee7a thanh nam ch\u00e2m."],"hint":"","explain":"<span class='basic_left'>\u0110\u01b0\u1eddng s\u1ee9c t\u1eeb l\u00e0 nh\u1eefng \u0111\u01b0\u1eddng cong \u0111\u01b0\u1ee3c v\u1ebd theo quy \u01b0\u1edbc sao cho: C\u00f3 chi\u1ec1u \u0111i t\u1eeb c\u1ef1c B\u1eafc \u0111\u1ebfn c\u1ef1c Nam c\u1ee7a thanh nam ch\u00e2m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3094},{"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/bai23/lv2/img\/h5.jpg'\/><\/center>Tr\u00ean h\u00ecnh 23.6 l\u1ef1c t\u1eeb t\u00e1c d\u1ee5ng l\u00ean kim nam ch\u00e2m \u0111\u1eb7t \u1edf \u0111i\u1ec3m n\u00e0o l\u00e0 m\u1ea1nh nh\u1ea5t? ","select":["A. \u0110i\u1ec3m 1.","B. \u0110i\u1ec3m 2.","C. \u0110i\u1ec3m 3.","D. \u0110i\u1ec3m 4."],"hint":"","explain":"<span class='basic_left'>L\u1ef1c t\u1eeb t\u00e1c d\u1ee5ng l\u00ean kim nam ch\u00e2m \u0111\u1eb7t \u1edf \u0111i\u1ec3m 1 l\u00e0 m\u1ea1nh nh\u1ea5t v\u00ec \u1edf hai \u0111\u1ea7u c\u1ef1c c\u00f3 c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb mau h\u01a1n m\u00e0 n\u01a1i n\u00e0o c\u00f3 t\u1eeb tr\u01b0\u1eddng m\u1ea1nh th\u00ec \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb d\u00e0y, n\u01a1i n\u00e0o c\u00f3 t\u1eeb tr\u01b0\u1eddng y\u1ebfu th\u00ec \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb th\u01b0a.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3095},{"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/bai23/lv2/img\/h6.jpg'\/><\/center>Quan s\u00e1t t\u1eeb ph\u1ed5 c\u1ee7a hai thanh nam ch\u00e2m \u1edf h\u00ecnh v\u1ebd. H\u00e3y cho bi\u1ebft nam ch\u00e2m \u1edf h\u00ecnh n\u00e0o c\u00f3 t\u1eeb tr\u01b0\u1eddng m\u1ea1nh h\u01a1n ? Bi\u1ebft r\u1eb1ng l\u01b0\u1ee3ng m\u1ea1t s\u1eaft d\u00f9ng cho hai th\u00ed nghi\u1ec7m b\u1eb1ng nhau","select":["A. Kh\u00f4ng th\u1ec3 so s\u00e1nh \u0111\u01b0\u1ee3c.","B. C\u1ea3 a, b m\u1ea1nh nh\u01b0 nhau.","C. H\u00ecnh b.","D. H\u00ecnh a."],"hint":"","explain":"<span class='basic_left'>Nam ch\u00e2m \u1edf h\u00ecnh a m\u1ea1nh h\u01a1n do m\u1eadt \u0111\u1ed9 t\u1eeb ph\u1ed5 d\u00e0y h\u01a1n. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3096},{"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/bai23/lv2/img\/h7.jpg'\/><\/center>Nh\u00ecn v\u00e0o chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u1ee7a nam ch\u00e2m th\u1eb3ng. H\u00e3y ph\u00e2n bi\u1ec7t c\u00e1c c\u1ef1c v\u00e0 cho bi\u1ebft t\u1eeb tr\u01b0\u1eddng m\u1ea1nh t\u1ea1i \u0111\u00e2u ?","select":["A. C\u1ef1c S t\u1ea1i A v\u00e0 t\u1eeb tr\u01b0\u1eddng ch\u1ec9 m\u1ea1nh t\u1ea1i A","B. C\u1ef1c S t\u1ea1i B v\u00e0 t\u1eeb tr\u01b0\u1eddng ch\u1ec9 m\u1ea1nh t\u1ea1i B","C. C\u1ef1c S t\u1ea1i B v\u00e0 t\u1eeb tr\u01b0\u1eddng m\u1ea1nh t\u1ea1i hai \u0111\u1ea7u A, B","D. C\u1ef1c S t\u1ea1i A v\u00e0 t\u1eeb tr\u01b0\u1eddng m\u1ea1nh t\u1ea1i hai \u0111\u1ea7u A, B"],"hint":"","explain":"<span class='basic_left'>C\u1ef1c S t\u1ea1i B v\u00e0 t\u1eeb tr\u01b0\u1eddng m\u1ea1nh t\u1ea1i hai \u0111\u1ea7u A, B. Do \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb trong l\u00f2ng nam ch\u00e2m c\u00f3 chi\u1ec1u \u2018v\u00e0o Nam (S) , ra B\u1eafc (N)\u2019. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3097},{"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":"H\u00e3y ch\u1ecdn c\u00e2u ph\u00e1t bi\u1ec3u \u0111\u00fang.","select":["A. Xung quanh nam ch\u00e2m, xung quanh d\u00f2ng \u0111i\u1ec7n c\u00f3 t\u1eeb tr\u01b0\u1eddng.","B. Ta kh\u00f4ng nh\u1eadn bi\u1ebft t\u1eeb tr\u01b0\u1eddng b\u1eb1ng m\u1eaft th\u01b0\u1eddng.","C. \u0110\u1ec3 h\u00ecnh dung ra t\u1eeb tr\u01b0\u1eddng v\u00e0 nghi\u00ean c\u1ee9u t\u1eeb t\u00ednh c\u1ee7a n\u00f3 ta d\u00f9ng t\u1eeb ph\u1ed5.","D. C\u1ea3 3 ph\u01b0\u01a1ng \u00e1n \u0111\u00fang."],"hint":"","explain":"<span class='basic_left'>Xung quanh nam ch\u00e2m, xung quanh d\u00f2ng \u0111i\u1ec7n c\u00f3 t\u1eeb tr\u01b0\u1eddng.<br\/>Ta kh\u00f4ng nh\u1eadn bi\u1ebft t\u1eeb tr\u01b0\u1eddng b\u1eb1ng m\u1eaft th\u01b0\u1eddng. <br\/>\u0110\u1ec3 h\u00ecnh dung ra t\u1eeb tr\u01b0\u1eddng v\u00e0 nghi\u00ean c\u1ee9u t\u1eeb t\u00ednh c\u1ee7a n\u00f3 ta d\u00f9ng t\u1eeb ph\u1ed5. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3098},{"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/bai23/lv2/img\/h9.jpg'\/><\/center> Hai thanh nam ch\u00e2m \u0111\u1eb7t g\u1ea7n nhau t\u1ea1i c\u00e1c v\u1ecb tr\u00ed nh\u01b0 h\u00ecnh v\u1ebd 23.9 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111\u01b0\u1ee3c v\u1ebd theo h\u00ecnh 23.10 \u1ee9ng v\u1edbi v\u1ecb tr\u00ed n\u00e0o c\u1ee7a hai thanh nam ch\u00e2m ?","select":["A. H\u00ecnh d.","B. H\u00ecnh c.","C. H\u00ecnh a.","D. H\u00ecnh b."],"hint":"","explain":"<span class='basic_left'>Do \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb trong l\u00f2ng nam ch\u00e2m c\u00f3 chi\u1ec1u \u2018v\u00e0o Nam (S) , ra B\u1eafc (N)\u2019. N\u00ean t\u1eeb h\u00ecnh v\u1ebd ta ch\u1ec9 c\u00f3 th\u1ec3 ch\u1ecdn h\u00ecnh b l\u00e0 \u0111\u00fang. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3099},{"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 th\u00ed nghi\u1ec7m v\u1ec1 t\u1eeb ph\u1ed5, t\u1ea1i sao ng\u01b0\u1eddi ta kh\u00f4ng d\u00f9ng m\u1ea1t \u0111\u1ed3ng ho\u1eb7c m\u1ea1t k\u1ebdm m\u00e0 l\u1ea1i d\u00f9ng m\u1ea1t s\u1eaft ?","select":["A. \u0110\u1ed3ng v\u00e0 k\u1ebdm l\u00e0 nh\u1eefng ch\u1ea5t c\u00f3 t\u1eeb t\u00ednh y\u1ebfu h\u01a1n nhi\u1ec1u so v\u1edbi s\u1eaft.","B. \u0110\u1ed3ng v\u00e0 k\u1ebdm c\u00f3 th\u1ec3 b\u1ecb n\u00f3ng ch\u1ea3y khi \u0111\u1eb7t trong t\u1eeb tr\u01b0\u1eddng.","C. C\u1ea3 ba l\u00ed do \u0111\u1ec1u \u0111\u00fang.","D. \u0110\u1ed3ng v\u00e0 k\u1ebdm l\u00e0 nh\u1eefng ch\u1ea5t kh\u00f3 t\u00ecm h\u01a1n s\u1eaft."],"hint":"","explain":"<span class='basic_left'>\u0110\u1ed3ng v\u00e0 k\u1ebdm l\u00e0 nh\u1eefng ch\u1ea5t c\u00f3 t\u1eeb t\u00ednh y\u1ebfu h\u01a1n nhi\u1ec1u so v\u1edbi s\u1eaft. N\u00ean ch\u00fang kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi 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":3100},{"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/bai23/lv2/img\/h11.jpg'\/><\/center>Quan sat h\u00ecnh d\u01b0\u1edbi \u0111\u00e2y. H\u00e3y ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0111\u00fang. T\u1eeb ph\u1ed5 l\u00e0 :","select":["A. T\u1ea5t c\u1ea3 \u0111\u00fang.","B. L\u1edbp m\u1ea1t s\u1eaft s\u1eafp x\u1ebfp th\u00e0nh nh\u1eefng \u0111\u01b0\u1eddng cong n\u1ed1i t\u1eeb c\u1ef1c n\u00e0y sang c\u1ef1c kia c\u1ee7a nam ch\u00e2m.","C. H\u00ecnh \u1ea3nh c\u00e1c \u0111\u01b0\u1eddng m\u1ea1t s\u1eaft xung quanh nam ch\u00e2m.","D. H\u00ecnh \u1ea3nh tr\u1ef1c quan v\u1ec1 t\u1eeb tr\u01b0\u1eddng, c\u00e0ng xa nam ch\u00e2m c\u00e1c \u0111\u01b0\u1eddng m\u1ea1t s\u1eaft c\u00e0ng th\u01b0a d\u1ea7n."],"hint":"","explain":"<span class='basic_left'>\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a t\u1eeb ph\u1ed5:<br\/>L\u1edbp m\u1ea1t s\u1eaft s\u1eafp x\u1ebfp th\u00e0nh nh\u1eefng \u0111\u01b0\u1eddng cong n\u1ed1i t\u1eeb c\u1ef1c n\u00e0y sang c\u1ef1c kia c\u1ee7a nam ch\u00e2m. <br\/>H\u00ecnh \u1ea3nh c\u00e1c \u0111\u01b0\u1eddng m\u1ea1t s\u1eaft xung quanh nam ch\u00e2m.<br\/>H\u00ecnh \u1ea3nh tr\u1ef1c quan v\u1ec1 t\u1eeb tr\u01b0\u1eddng, c\u00e0ng xa nam ch\u00e2m c\u00e1c \u0111\u01b0\u1eddng m\u1ea1t s\u1eaft c\u00e0ng th\u01b0a d\u1ea7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3101},{"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":"Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y l\u00e0 sai khi n\u00f3i v\u1ec1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb ?","select":["A. Chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb h\u01b0\u1edbng t\u1eeb c\u1ef1c B\u1eafc sang c\u1ef1c Nam c\u1ee7a kim nam ch\u00e2m th\u1eed \u0111\u1eb7t tr\u00ean \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111\u00f3.","B. V\u1edbi m\u1ed9t nam ch\u00e2m, c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb kh\u00f4ng bao gi\u1edd c\u1eaft nhau.","C. B\u00ean ngo\u00e0i m\u1ed9t nam ch\u00e2m th\u00ec \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111i ra t\u1eeb c\u1ef1c B\u1eafc v\u00e0 \u0111i v\u00e0o t\u1eeb c\u1ef1c Nam c\u1ee7a nam ch\u00e2m \u0111\u00f3.","D. T\u1ea1i b\u1ea5t k\u00ec \u0111i\u1ec3m n\u00e0o tr\u00ean \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb, tr\u1ee5c c\u1ee7a kim nam ch\u00e2m c\u0169ng ti\u1ebfp x\u00fac v\u1edbi \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111\u00f3."],"hint":"","explain":"<span class='basic_left'>Chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb h\u01b0\u1edbng t\u1eeb c\u1ef1c B\u1eafc sang c\u1ef1c Nam c\u1ee7a kim nam ch\u00e2m th\u1eed \u0111\u1eb7t tr\u00ean \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111\u00f3. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3102},{"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/bai23/lv2/img\/h13.jpg'\/><\/center>Nh\u00ecn v\u00e0o \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u1ee7a nam ch\u00e2m h\u00ecnh m\u00f3ng ng\u1ef1a. H\u00e3y cho bi\u1ebft c\u00e1c c\u1ef1c c\u1ee7a nam ch\u00e2m v\u00e0 t\u1ea1i nh\u1eefng v\u1ecb tr\u00ed n\u00e0o c\u1ee7a nam ch\u00e2m c\u00f3 t\u1eeb tr\u01b0\u1eddng \u0111\u1ec1u.","select":["A. C\u1ef1c B\u1eafc t\u1ea1i A v\u00e0 t\u1eeb tr\u01b0\u1eddng \u0111\u1ec1u \u1edf hai c\u1ef1c.","B. C\u1ef1c B\u1eafc t\u1ea1i B v\u00e0 t\u1eeb tr\u01b0\u1eddng \u0111\u1ec1u \u1edf gi\u1eefa hai nh\u00e1nh nam ch\u00e2m.","C. C\u1ef1c B\u1eafc t\u1ea1i B v\u00e0 t\u1eeb tr\u01b0\u1eddng \u0111\u1ec1u \u1edf hai c\u1ef1c.","D. C\u1ef1c B\u1eafc t\u1ea1i A v\u00e0 t\u1eeb tr\u01b0\u1eddng \u0111\u1ec1u \u1edf gi\u1eefa hai nh\u00e1nh nam ch\u00e2m."],"hint":"","explain":"<span class='basic_left'>Chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb h\u01b0\u1edbng t\u1eeb c\u1ef1c B\u1eafc sang c\u1ef1c Nam c\u1ee7a kim nam ch\u00e2m.<br\/>N\u00ean c\u1ef1c B\u1eafc t\u1ea1i A v\u00e0 t\u1eeb tr\u01b0\u1eddng \u0111\u1ec1u \u1edf gi\u1eefa hai nh\u00e1nh nam ch\u00e2m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3103},{"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 ph\u1ed5 l\u00e0 g\u00ec?","select":["A. H\u00ecnh \u1ea3nh c\u1ee5 th\u1ec3 v\u1ec1 c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb.","B. C\u00e1c m\u1ea1t s\u1eaft \u0111\u01b0\u1ee3c r\u1eafc l\u00ean thanh nam ch\u00e2m.","C. T\u1eeb tr\u01b0\u1eddng xu\u1ea5t hi\u1ec7n xung quanh d\u00f2ng \u0111i\u1ec7n.","D. L\u1ef1c t\u1eeb t\u00e1c d\u1ee5ng l\u00ean kim nam ch\u00e2m."],"hint":"","explain":"<span class='basic_left'>T\u1eeb ph\u1ed5 l\u00e0 h\u00ecnh \u1ea3nh c\u1ee5 th\u1ec3 v\u1ec1 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":3104},{"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/bai23/lv2/img\/h15.jpg'\/><\/center>H\u00ecnh v\u1ebd d\u01b0\u1edbi \u0111\u00e2y bi\u1ec3u di\u1ec5n c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u1ee7a hai thanh nam ch\u00e2m \u0111\u1eb7t g\u1ea7n nhau, h\u00e3y ch\u1ec9 ra t\u00ean hai c\u1ef1c c\u1ee7a hai thanh nam ch\u00e2m n\u00e0y.","select":["A. C\u1ea3 hai c\u1ef1c \u0111\u1ec1u l\u00e0 c\u1ef1c B\u1eafc.","B. C\u1ea3 hai c\u1ef1c \u0111\u1ec1u l\u00e0 c\u1ef1c Nam.","C. C\u1ef1c 1 l\u00e0 c\u1ef1c B\u1eafc, c\u1ef1c 2 l\u00e0 c\u1ef1c Nam.","D. C\u1ef1c 1 l\u00e0 c\u1ef1c Nam, c\u1ef1c 2 l\u00e0 c\u1ef1c B\u1eafc."],"hint":"","explain":"<span class='basic_left'>\u0110\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111\u1ec1u c\u00f3 h\u01b0\u1edbng \u0111i ra t\u1eeb 2 c\u1ef1c, v\u1eady n\u00ean hai c\u1ef1c \u0111\u1ec1u l\u00e0 c\u1ef1c b\u1eafc (N).<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3105},{"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":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/vatly/bai23/lv2/img\/h16.jpg'\/><\/center>Hai c\u1ef1c kh\u00e1c t\u00ean c\u1ee7a hai nam ch\u00e2m th\u1eb3ng h\u00fat nhau theo h\u00ecnh 23.5. \u0110\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n \u0111\u00fang \u1edf h\u00ecnh n\u00e0o ?","select":["A. H\u00ecnh d.","B. H\u00ecnh b.","C. H\u00ecnh a.","D. H\u00ecnh c."],"hint":"","explain":"<span class='basic_left'>Hai nam ch\u00e2m gh\u00e9p l\u1ea1i nh\u01b0 h\u00ecnh v\u1ebd, th\u00e0nh m\u1ed9t nam ch\u00e2m m\u1edbi. C\u00f3 chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111i ra kh\u1ecfi c\u1ef1c B\u1eafc (N) v\u00e0 \u0111i v\u00e0o \u1edf c\u1ef1c Nam (S). <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3106},{"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":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/vatly/bai23/lv2/img\/h17.jpg'\/><\/center>H\u00ecnh \u1ea3nh \u0111\u1ecbnh h\u01b0\u1edbng c\u1ee7a kim nam ch\u00e2m \u0111\u1eb7t t\u1ea1i c\u00e1c \u0111i\u1ec3m kh\u00e1c nhau xung quanh thanh nam ch\u00e2m. H\u00e3y ch\u1ec9 ra c\u1ef1c B\u1eafc c\u1ee7a thanh nam ch\u00e2m.","select":["A. Kh\u00f4ng x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c.","B. C\u1ef1c B\u1eafc c\u1ee7a thanh nam ch\u00e2m \u1edf 1.","C. Nam ch\u00e2m th\u1eed \u0111\u1ecbnh h\u01b0\u1edbng sai.","D. C\u1ef1c B\u1eafc c\u1ee7a thanh nam ch\u00e2m \u1edf 2."],"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":3107},{"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/bai23/lv2/img\/h18.jpg'\/><\/center>Nh\u00ecn v\u00e0o chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u1ee7a nam ch\u00e2m th\u1eb3ng. H\u00e3y ph\u00e2n bi\u1ec7t c\u00e1c c\u1ef1c v\u00e0 cho bi\u1ebft t\u1eeb tr\u01b0\u1eddng m\u1ea1nh t\u1ea1i \u0111\u00e2u ?","select":["A. C\u1ef1c S t\u1ea1i B v\u00e0 t\u1eeb tr\u01b0\u1eddng m\u1ea1nh t\u1ea1i hai \u0111\u1ea7u A, B.","B. C\u1ef1c S t\u1ea1i B v\u00e0 t\u1eeb tr\u01b0\u1eddng ch\u1ec9 m\u1ea1nh t\u1ea1i B.","C. C\u1ef1c S t\u1ea1i A v\u00e0 t\u1eeb tr\u01b0\u1eddng m\u1ea1nh t\u1ea1i hai \u0111\u1ea7u A, B.","D. C\u1ef1c S t\u1ea1i A v\u00e0 t\u1eeb tr\u01b0\u1eddng ch\u1ec9 m\u1ea1nh t\u1ea1i A."],"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":3108},{"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":"H\u00e3y ch\u1ecdn c\u00e2u ph\u00e1t bi\u1ec3u \u0111\u00fang.","select":["A. \u0110\u01b0\u1eddng s\u1ee9c t\u1eeb c\u1ee7a nam ch\u00e2m l\u00e0 h\u00ecnh v\u1ebd nh\u1eefng \u0111\u01b0\u1eddng m\u1ea1t s\u1eaft ph\u00e2n b\u1ed1 xung quanh thanh nam ch\u00e2m.","B. \u1ede \u0111\u1ea7u c\u1ef1c c\u1ee7a nam ch\u00e2m, c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb d\u00e0y cho bi\u1ebft t\u1eeb tr\u01b0\u1eddng m\u1ea1nh, c\u00e0ng xa nam ch\u00e2m, c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb c\u00e0ng th\u01b0a cho bi\u1ebft t\u1eeb tr\u01b0\u1eddng y\u1ebfu.","C. Ng\u01b0\u1eddi ta quy \u01b0\u1edbc b\u00ean trong thanh nam ch\u00e2m : Chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb h\u01b0\u1edbng t\u1eeb c\u1ef1c Nam sang c\u1ef1c B\u1eafc ; b\u00ean ngo\u00e0i thanh nam ch\u00e2m : Chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111i ra t\u1eeb c\u1ef1c B\u1eafc v\u00e0 \u0111i v\u00e0o \u1edf c\u1ef1c Nam.","D. C\u1ea3 3 ph\u01b0\u01a1ng \u00e1n \u0111\u00fang."],"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":3109},{"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":"Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y l\u00e0 sai khi n\u00f3i v\u1ec1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb ?","select":["A. B\u00ean ngo\u00e0i m\u1ed9t nam ch\u00e2m th\u00ec \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111i ra t\u1eeb c\u1ef1c B\u1eafc v\u00e0 \u0111i v\u00e0o t\u1eeb c\u1ef1c Nam c\u1ee7a nam ch\u00e2m \u0111\u00f3.","B. T\u1ea1i b\u1ea5t k\u00ec \u0111i\u1ec3m n\u00e0o tr\u00ean \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb, tr\u1ee5c c\u1ee7a kim nam ch\u00e2m c\u0169ng ti\u1ebfp x\u00fac v\u1edbi \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111\u00f3.","C. V\u1edbi m\u1ed9t nam ch\u00e2m, c\u00e1c \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb kh\u00f4ng bao gi\u1edd c\u1eaft nhau.","D. Chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb h\u01b0\u1edbng t\u1eeb c\u1ef1c B\u1eafc sang c\u1ef1c Nam c\u1ee7a kim nam ch\u00e2m th\u1eed \u0111\u1eb7t tr\u00ean \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb \u0111\u00f3."],"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":3110}],"lesson":{"save":0,"level":2}}