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範例:電流磁效應與螺線管[102學測]

有一固定不動的磁棒及螺線管,磁棒的長軸通過垂直置放之螺線管的圓心P點,當螺線管通以電流時,空間中的磁力線分布如附圖中的虛線。若在圖中P點右方觀察,則下列關於電流與磁場的敘述,何者正確?

(A)螺線管上電流為零
(B)P點的磁場方向為向上
(C)P點的磁場方向為向下
(D)螺線管上電流方向為順時針方向
(E)螺線管上電流方向為逆時針方向。

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Posted in 歷屆學測(推甄)考題, 歷屆學測試題, 電流產生的磁場, 電流磁效應.

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