Từ trường - Bài tập nâng cao

Home Lớp 7 Khoa học tự nhiên 7 - Sách kết nối tri thức Bài 19: Từ trườngBài tập nâng cao

{"common":{"save":0,"post_id":"6357","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"10063","post_id":"6357","mon_id":"1158739","chapter_id":"1158841","question":"T\u1eeb tr\u01b0\u1eddng không gây ra hi\u1ec7n t\u01b0\u1ee3ng nào sau \u0111ây?<\/p>","options":["A. Làm \u0111\u1ed3ng h\u1ed3 ch\u1ea1y sai gi\u1edd.","B. Làm x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng c\u1ef1c quang \u1edf \u0111\u1ecba c\u1ef1c.","C. Làm bóng \u0111èn s\u1ee3i \u0111\u1ed1t phát sáng.","D. Làm la bàn \u0111\u1ecbnh h\u01b0\u1edbng Nam – B\u1eafc."],"correct":"3","level":"3","hint":"T\u1eeb tr\u01b0\u1eddng gây ra các hi\u1ec7n t\u01b0\u1ee3ng: - Làm \u0111\u1ed3ng h\u1ed3 ch\u1ea1y sai gi\u1edd. - Làm x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng c\u1ef1c quang \u1edf \u0111\u1ecba c\u1ef1c. - Làm la bàn \u0111\u1ecbnh h\u01b0\u1edbng Nam – B\u1eafc.<\/p>","answer":"C – là hi\u1ec7n t\u01b0\u1ee3ng gây ra b\u1edfi \u0111i\u1ec7n n\u0103ng. \u0110áp án \u0111úng: C. Làm bóng \u0111èn s\u1ee3i \u0111\u1ed1t phát sáng.<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-10-28 02:24:29","option_type":"txt","len":3},{"id":"10064","post_id":"6357","mon_id":"1158739","chapter_id":"1158841","question":"Khi s\u1eed d\u1ee5ng la bàn \u0111\u1ec3 xác \u0111\u1ecbnh ph\u01b0\u01a1ng h\u01b0\u1edbng, n\u1ebfu ta \u0111\u1eb7t la bàn g\u1ea7n nam châm ho\u1eb7c các v\u1eadt có t\u1eeb tính thì<\/p>","options":["A. la bàn làm m\u1ea5t t\u1eeb tính c\u1ee7a nam châm hay các v\u1eadt có t\u1eeb tính.","B. la bàn và nam châm (hay các v\u1eadt có t\u1eeb tính) không \u1ea3nh h\u01b0\u1edfng, t\u01b0\u01a1ng tác gì \u0111\u1ebfn nhau.","C. la bàn ch\u1ec9 h\u01b0\u1edbng chính xác h\u01a1n và t\u1eeb tính c\u1ee7a nam châm (hay các v\u1eadt có t\u1eeb tính) t\u0103ng lên.","D. t\u1eeb tr\u01b0\u1eddng c\u1ee7a nam châm hay các v\u1eadt có t\u1eeb tính \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp t\u1edbi vi\u1ec7c xác \u0111\u1ecbnh h\u01b0\u1edbng c\u1ee7a la bàn."],"correct":"4","level":"3","hint":"Khi s\u1eed d\u1ee5ng la bàn \u0111ê xác \u0111\u1ecbnh ph\u01b0\u01a1ng h\u01b0\u1edbng không \u0111\u1eb7t la bàn g\u1ea7n các v\u1eadt có t\u1eeb tính vì nó làm \u1ea3nh h\u01b0\u1edfng tói vi\u1ec7c xác \u0111\u1ecbnh h\u01b0\u1edbng c\u1ee7a la bàn.<\/p>","answer":"Khi s\u1eed d\u1ee5ng la bàn \u0111\u1ec3 xác \u0111\u1ecbnh ph\u01b0\u01a1ng h\u01b0\u1edbng, n\u1ebfu ta \u0111\u1eb7t la bàn g\u1ea7n nam châm ho\u1eb7c các v\u1eadt có t\u1eeb tính thì t\u1eeb tr\u01b0\u1eddng c\u1ee7a nam châm hay các v\u1eadt có t\u1eeb tính \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp t\u1edbi vi\u1ec7c xác \u0111\u1ecbnh h\u01b0\u1edbng c\u1ee7a la bàn. \u0110áp án \u0111úng: D. t\u1eeb tr\u01b0\u1eddng c\u1ee7a nam châm hay các v\u1eadt có t\u1eeb tính \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp t\u1edbi vi\u1ec7c xác \u0111\u1ecbnh h\u01b0\u1edbng c\u1ee7a la bàn.<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-10-28 02:25:27","option_type":"txt","len":3},{"id":"10065","post_id":"6357","mon_id":"1158739","chapter_id":"1158841","question":"Cho thanh nam châm có các t\u1eeb c\u1ef1c nh\u01b0 hình v\u1ebd, em hãy ch\u1ec9 ra chi\u1ec1u c\u1ee7a các \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb t\u1ea1i \u0111i\u1ec3m A, B?<\/p><svg height=\"184\" width=\"231\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g><title><\/title><rect fill=\"#fff\" height=\"186\" id=\"canvas_background\" width=\"233\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><image height=\"184\" id=\"svg_1\" width=\"231\" x=\"0\" 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\" y=\"0\"><\/image> <\/g> <\/svg><\/span><\/p>","options":["A. \u0110\u01b0\u1eddng s\u1ee9c t\u1eeb t\u1ea1i c\u1ea3 hai \u0111i\u1ec3m A và B \u0111\u1ec1u có chi\u1ec1u t\u1eeb trên xu\u1ed1ng d\u01b0\u1edbi. \n ","B. \u0110\u01b0\u1eddng s\u1ee9c t\u1eeb t\u1ea1i c\u1ea3 hai \u0111i\u1ec3m A và B \u0111\u1ec1u có chi\u1ec1u t\u1eeb d\u01b0\u1edbi lên trên.","C. \u0110\u01b0\u1eddng s\u1ee9c t\u1eeb t\u1ea1i \u0111i\u1ec3m A có chi\u1ec1u t\u1eeb trên xu\u1ed1ng d\u01b0\u1edbi và t\u1ea1i B có chi\u1ec1u t\u1eeb d\u01b0\u1edbi lên trên.","D. \u0110\u01b0\u1eddng s\u1ee9c t\u1eeb t\u1ea1i \u0111i\u1ec3m A có chi\u1ec1u t\u1eeb d\u01b0\u1edbi lên trên và t\u1ea1i B có chi\u1ec1u t\u1eeb trên xu\u1ed1ng d\u01b0\u1edbi."],"correct":"1","level":"3","hint":"Ng\u01b0\u1eddi ta quy \u01b0\u1edbc chi\u1ec1u c\u1ee7a \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb có chi\u1ec1u \u0111i ra t\u1eeb c\u1ef1c B\u1eafc, \u0111i vào t\u1eeb c\u1ef1c Nam.<\/p>","answer":"Theo hình v\u1ebd ta xác \u0111\u1ecbnh \u0111\u01b0\u1ee3c, c\u1ef1c B\u1eafc và c\u1ef1c Nam c\u1ee7a thanh nam châm, do v\u1eady chi\u1ec1u \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb s\u1ebd \u0111i ra \u1edf c\u1ef1c B\u1eafc và \u0111i vào \u1edf c\u1ef1c Nam t\u01b0\u01a1ng \u1ee9ng v\u1edbi \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb t\u1ea1i c\u1ea3 hai \u0111i\u1ec3m A và B \u0111\u1ec1u có chi\u1ec1u t\u1eeb trên xu\u1ed1ng d\u01b0\u1edbi. \u0110áp án \u0111úng: A. \u0110\u01b0\u1eddng s\u1ee9c t\u1eeb t\u1ea1i c\u1ea3 hai \u0111i\u1ec3m A và B \u0111\u1ec1u có chi\u1ec1u t\u1eeb trên xu\u1ed1ng d\u01b0\u1edbi.<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-10-28 02:27:46","option_type":"txt","len":3}]}