本题目来源于试卷: Physics Unit20: Magnetism，类别为 国际高中通用物理
[单选题]
The force on a current-carryingjgk b :qbj4.qh*ra2s4 )-ykff wire in a magn3 g ss:if4bfd6etic field is equal to zero when
A. the current is parallel to the field lines.
B. the current is at a $30^{\circ}$ angle with respect to the field lines.
C. the current is at a $60^{\circ}$ angle with respect to the field lines.
D. the current is perpendicular to the field lines.
参考答案: A
本题详细解析:
暂无
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