Cường độ dòng điện và hiệu điện thế

Home Lớp 8 Khoa học tự nhiên 8 - sách Kết nối tri thức Bài 24: Cường độ dòng điện và hiệu điện thếBài tập trung bình

{"common":{"save":0,"post_id":"9218","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"9747","post_id":"9218","mon_id":"1159539","chapter_id":"1159897","question":"T\u1ea1i sao khi m\u1eafc vôn k\u1ebf \u0111\u1ec3 \u0111o hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa hai \u0111\u1ea7u bóng \u0111èn, ta ph\u1ea3i m\u1eafc song song v\u1edbi bóng \u0111èn?<\/p>","options":["A. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o dòng \u0111i\u1ec7n qua vôn k\u1ebf b\u1eb1ng 0","B. \u0110\u1ec3 vôn k\u1ebf không b\u1ecb h\u1ecfng","C. \u0110\u1ec3 vôn k\u1ebf \u0111o \u0111úng hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa hai \u0111i\u1ec3m","D. \u0110\u1ec3 dòng \u0111i\u1ec7n ch\u1ea1y qua bóng \u0111èn y\u1ebfu \u0111i"],"correct":"3","level":"2","hint":"Ghi nh\u1edb quy t\u1eafc m\u1eafc vôn k\u1ebf và m\u1ee5c \u0111ích \u0111o.<\/p>","answer":"\u0110áp án \u0111úng là: C. \u0110\u1ec3 vôn k\u1ebf \u0111o \u0111úng hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa hai \u0111i\u1ec3m<\/strong> Gi\u1ea3i thích:<\/strong><\/p>M\u1eafc song song giúp vôn k\u1ebf \u0111o chính xác hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa hai \u0111i\u1ec3m c\u1ea7n \u0111o.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"0","date":"2025-05-10 14:19:52","option_type":"txt","len":3},{"id":"9748","post_id":"9218","mon_id":"1159539","chapter_id":"1159897","question":"Khi m\u1eafc ampe k\u1ebf vào m\u1ea1ch, n\u1ebfu m\u1eafc sai chi\u1ec1u (\u0111\u1ed5i ch\u1ed1t âm – d\u01b0\u01a1ng), hi\u1ec7n t\u01b0\u1ee3ng nào có th\u1ec3 x\u1ea3y ra?<\/p>","options":["A. Không có dòng \u0111i\u1ec7n trong m\u1ea1ch","B. Ampe k\u1ebf không ch\u1ec9 s\u1ed1 ho\u1eb7c ch\u1ec9 sai chi\u1ec1u","C. M\u1ea1ch \u0111i\u1ec7n b\u1ecb cháy","D. Vôn k\u1ebf ch\u1ec9 s\u1ed1 âm"],"correct":"2","level":"2","hint":"Ampe k\u1ebf ch\u1ec9 \u0111úng chi\u1ec1u khi ch\u1ed1t (+) n\u1ed1i v\u1edbi c\u1ef1c d\u01b0\u01a1ng.<\/p>","answer":"\u0110áp án \u0111úng là: B. Ampe k\u1ebf không ch\u1ec9 s\u1ed1 ho\u1eb7c ch\u1ec9 sai chi\u1ec1u<\/strong> Gi\u1ea3i thích:<\/strong><\/p>M\u1eafc sai chi\u1ec1u khi\u1ebfn ampe k\u1ebf ch\u1ec9 sai, ho\u1eb7c kim l\u1ec7ch ng\u01b0\u1ee3c chi\u1ec1u g\u1ed1c.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"0","date":"2025-05-10 14:33:07","option_type":"txt","len":3},{"id":"9749","post_id":"9218","mon_id":"1159539","chapter_id":"1159897","question":"Khi hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa hai \u0111\u1ea7u bóng \u0111èn t\u0103ng lên, thì c\u01b0\u1eddng \u0111\u1ed9 dòng \u0111i\u1ec7n qua bóng \u0111èn s\u1ebd:<\/p>","options":["A. T\u0103ng","B. Gi\u1ea3m","C. Không thay \u0111\u1ed5i","D. B\u1eb1ng 0"],"correct":"1","level":"2","hint":"M\u1ed1i quan h\u1ec7 gi\u1eefa hi\u1ec7u \u0111i\u1ec7n th\u1ebf và c\u01b0\u1eddng \u0111\u1ed9 dòng \u0111i\u1ec7n.<\/p>","answer":"\u0110áp án \u0111úng là: A. T\u0103ng<\/strong> Gi\u1ea3i thích:<\/strong><\/p>Khi t\u0103ng hi\u1ec7u \u0111i\u1ec7n th\u1ebf (gi\u1eef \u0111i\u1ec7n tr\u1edf không \u0111\u1ed5i), thì dòng \u0111i\u1ec7n ch\u1ea1y qua m\u1ea1nh h\u01a1n → I t\u0103ng.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"0","date":"2025-05-10 14:33:53","option_type":"txt","len":2}]}