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1. 關於電力線與磁力線的說明,以下說明正確的有幾個?(甲) 磁力線於磁鐵外部由N極出發回到S極、內部是由S極到N極,形成封閉迴圈。(乙) 電力線於電荷正極出發回到負極再由負極回到正極,形成封閉迴圈。
問題詳情
1. 關於電力線與磁力線的說明,以下說明正確的有幾個?
(甲) 磁力線於磁鐵外部由N極出發回到S極、內部是由S極到N極,形成封閉迴圈。
(乙) 電力線於電荷正極出發回到負極再由負極回到正極,形成封閉迴圈。
(丙) 電力線與電力線永不相交。
(丁) 磁力線與磁力線永不相交。
(戊) 電力線越密代表電場強度越強。
(己) 磁力線越密代表磁場強度越強。
(A)5個
(B)4個
(C)3個
(D)2個。
參考答案
答案:A
難度:
計算中
-1
書單:
沒有書單,新增
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