
B6C2_電與磁A卷
Quiz
•
Physics
•
9th Grade
•
Practice Problem
•
Hard
chungtsen chen
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40 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
家庭電器中,電鍋、吹風機、電風扇和電燈四者中,何者主要原理不是利用電流熱效應?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如圖,一電子由西向東水平射入一均勻的磁場,則該電子在磁場中所受力的方向為何?
向上
向下
向南
向北
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列甲、乙、丙三線圈中,哪些會沿順時針方向轉動?
甲乙
乙丙
甲丙
甲乙丙
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如圖,一磁針置於 M 點,鉛直的長直導線通以向下的電流,下列敘述何者錯誤?
電流增強,磁針偏轉角度變大
導線周圍的磁力方向為順時針方向
將導線向左移動時,磁針偏轉角度變小
磁針的 N 極會向(d)偏轉
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在一根無限長之導線旁邊放置一矩形線圈,兩者均通以電流 I,如圖所示,則線圈受力的方向為何?
向左
向右
向上
向下
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
有關磁力線的敘述,下列何者正確?
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如圖所示,一磁鐵垂直於銅環面,當磁鐵以 N 極向銅環靠近時,以圖中眼睛的位置觀察(設眼睛能辨明電流方向),則銅環感應電流的方向為何?
順時針方向
逆時針方向
先順時針方向,後為逆時針方向
無感應電流
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