{"common":{"save":0,"post_id":"8260","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"9655","post_id":"8260","mon_id":"1159533","chapter_id":"1159664","question":"<p>M\u1ed9t cu\u1ed9n dây có 500 vòng dây \u0111\u01b0\u1ee3c \u0111\u1eb7t trong t\u1eeb tr\u01b0\u1eddng \u0111\u1ec1u có \u0111\u1ed9 l\u1edbn c\u1ea3m \u1ee9ng t\u1eeb B = 0,2 T. Di\u1ec7n tích m\u1ed7i vòng dây là 0,01 <span class=\"math-tex\">$m^2$<\/span>. Cu\u1ed9n dây quay \u0111\u1ec1u v\u1edbi t\u1ea7n s\u1ed1 50 Hz. Tính su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng c\u1ef1c \u0111\u1ea1i xu\u1ea5t hi\u1ec7n trong cu\u1ed9n dây.<\/p>","options":["A. 50 V","B. 100 V","C. 314 V","D. 628 V"],"correct":"3","level":"3","hint":"","answer":"<p>\u0110áp án: C. 314 V<\/p><p>Gi\u1ea3i thích:<\/p><p>- Su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng c\u1ef1c \u0111\u1ea1i: <span class=\"math-tex\">$E_{max}\\n\u200b\\n =N.B.S.\u03c9=N.B.S.2\u03c0f= 500.0,2.0,01.2 \u03c0.50=314\\ V$<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"125","test":"0","date":"2025-01-11 13:08:51","option_type":"txt","len":0},{"id":"9656","post_id":"8260","mon_id":"1159533","chapter_id":"1159664","question":"<p>M\u1ed9t nam châm th\u1eb3ng \u0111\u01b0\u1ee3c \u0111\u1eb7t g\u1ea7n m\u1ed9t cu\u1ed9n dây d\u1eabn kín. Khi nam châm \u0111\u01b0\u1ee3c d\u1ecbch chuy\u1ec3n theo h\u01b0\u1edbng song song v\u1edbi cu\u1ed9n dây, hi\u1ec7n t\u01b0\u1ee3ng nào sau \u0111ây x\u1ea3y ?<\/p>","options":["A. Không có dòng \u0111i\u1ec7n xu\u1ea5t hi\u1ec7n trong cu\u1ed9n dây.","B. Dòng \u0111i\u1ec7n xoay chi\u1ec1u xu\u1ea5t hi\u1ec7n trong cu\u1ed9n dây.","C. Su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng trong cu\u1ed9n dây \u0111\u1ea1t giá tr\u1ecb c\u1ef1c \u0111\u1ea1i.","D. Dòng \u0111i\u1ec7n không \u0111\u1ed5i xu\u1ea5t hi\u1ec7n trong cu\u1ed9n dây."],"correct":"1","level":"3","hint":"","answer":"<p>\u0110áp án: A. Không có dòng \u0111i\u1ec7n xu\u1ea5t hi\u1ec7n trong cu\u1ed9n dây.<br \/>Gi\u1ea3i thích:<br \/>Khi nam châm di chuy\u1ec3n song song v\u1edbi cu\u1ed9n dây, s\u1ed1 \u0111\u01b0\u1eddng s\u1ee9c t\u1eeb xuyên qua ti\u1ebft di\u1ec7n cu\u1ed9n dây không thay \u0111\u1ed5i, nên không có hi\u1ec7n t\u01b0\u1ee3ng c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb.<br \/> <\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"125","test":"0","date":"2025-01-11 13:10:59","option_type":"txt","len":3},{"id":"9657","post_id":"8260","mon_id":"1159533","chapter_id":"1159664","question":"<p>M\u1ed9t khung dây d\u1eabn hình ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c \u0111\u1eb7t trong t\u1eeb tr\u01b0\u1eddng \u0111\u1ec1u có B = 0,1 T. Di\u1ec7n tích khung dây là <span class=\"math-tex\">$0,02\\ m^2$<\/span>. T\u1eeb thông qua khung dây gi\u1ea3m \u0111\u1ec1u t\u1eeb 0,002 Wb xu\u1ed1ng 0 Wb trong 0,01 s. Tính su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng c\u1ea3m \u1ee9ng trong khung dây.<\/p>","options":["A. 0,2 V","B. 0,02 V","C. 0,1 V","D. 2 V"],"correct":"1","level":"3","hint":"","answer":"<p>\u0110áp án: A. 0,2 V<\/p><p>Gi\u1ea3i thích:<\/p><p>- Su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng c\u1ea3m \u1ee9ng trong m\u1ea1ch: <span class=\"math-tex\">$E =-{\u0394\u03a6 \\over \u0394t} = {{\u03a6_2 \u2212\u03a6_1} \\over \u0394t}= {{0-0,002} \\over 0,01} = 0,2\\ V$<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"125","test":"0","date":"2025-01-11 13:16:58","option_type":"txt","len":0}]}
