問題詳情
. 如圖,E、F為磁針的兩極,置於導線AB的正下方,下列敘述何者正確?
(A)磁針的E端是N極
(B)磁針所在的地點,無論如何,磁場均向北
(C)當K按下時,E端將向東方偏轉
(D)按下K,可變電阻器的接點向D點移動時,F端偏轉的角度將變小
(E)無論可變電阻的接點如何移動,E端偏轉角度不變。

(A)磁針的E端是N極
(B)磁針所在的地點,無論如何,磁場均向北
(C)當K按下時,E端將向東方偏轉
(D)按下K,可變電阻器的接點向D點移動時,F端偏轉的角度將變小
(E)無論可變電阻的接點如何移動,E端偏轉角度不變。
參考答案
答案:B[無官方正解]
難度:困難0.25
統計:A(2),B(2),C(2),D(1),E(0)
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