{"common":{"save":0,"post_id":"8281","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"9450","post_id":"8281","mon_id":"1159533","chapter_id":"1159664","question":"<p>Dòng \u0111i\u1ec7n xoay chi\u1ec1u là dòng \u0111i\u1ec7n:<\/p>","options":["A. Có chi\u1ec1u không thay \u0111\u1ed5i theo th\u1eddi gian.","B. Có chi\u1ec1u và c\u01b0\u1eddng \u0111\u1ed9 thay \u0111\u1ed5i theo th\u1eddi gian.","C. Ch\u1ec9 ch\u1ea3y theo m\u1ed9t chi\u1ec1u nh\u1ea5t \u0111\u1ecbnh.","D. Không t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng."],"correct":"2","level":"1","hint":"","answer":"<p>\u0110áp án: B. Có chi\u1ec1u và c\u01b0\u1eddng \u0111\u1ed9 thay \u0111\u1ed5i theo th\u1eddi gian.<br \/>Gi\u1ea3i thích:<br \/>Dòng \u0111i\u1ec7n xoay chi\u1ec1u là dòng \u0111i\u1ec7n có chi\u1ec1u và c\u01b0\u1eddng \u0111\u1ed9 thay \u0111\u1ed5i theo th\u1eddi gian, th\u01b0\u1eddng có d\u1ea1ng hình sin.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"125","test":"0","date":"2024-12-31 09:32:40","option_type":"txt","len":3},{"id":"9451","post_id":"8281","mon_id":"1159533","chapter_id":"1159664","question":"<p>Tác d\u1ee5ng t\u1eeb c\u1ee7a dòng \u0111i\u1ec7n xoay chi\u1ec1u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong:<\/p>","options":["A. B\u1ebfp \u0111i\u1ec7n.","B. \u0110èn LED.","C. Máy bi\u1ebfn áp.","D. \u0110i\u1ec7n tr\u1edf."],"correct":"3","level":"1","hint":"","answer":"<p>\u0110áp án: C. Máy bi\u1ebfn áp.<br \/>Gi\u1ea3i thích:<br \/>Dòng \u0111i\u1ec7n xoay chi\u1ec1u t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng bi\u1ebfn \u0111\u1ed5i, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong máy bi\u1ebfn áp \u0111\u1ec3 thay \u0111\u1ed5i hi\u1ec7u \u0111i\u1ec7n th\u1ebf.<br \/> <\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"125","test":"0","date":"2024-12-31 09:34:03","option_type":"txt","len":2},{"id":"9452","post_id":"8281","mon_id":"1159533","chapter_id":"1159664","question":"<p>M\u1ed9t trong các tác d\u1ee5ng c\u1ee7a dòng \u0111i\u1ec7n xoay chi\u1ec1u là:<\/p>","options":["A. Tác d\u1ee5ng hóa h\u1ecdc.","B. Tác d\u1ee5ng t\u1eeb.","C. Tác d\u1ee5ng c\u01a1 h\u1ecdc.","D. Tác d\u1ee5ng ma sát."],"correct":"2","level":"1","hint":"","answer":"<p>\u0110áp án: B. Tác d\u1ee5ng t\u1eeb.<br \/>Gi\u1ea3i thích:<br \/>Dòng \u0111i\u1ec7n xoay chi\u1ec1u t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng bi\u1ebfn \u0111\u1ed5i, gây ra tác d\u1ee5ng t\u1eeb, \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong các thi\u1ebft b\u1ecb nh\u01b0 máy phát \u0111i\u1ec7n, máy bi\u1ebfn áp.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"125","test":"0","date":"2024-12-31 10:30:01","option_type":"txt","len":2}]}
