本题目来源于试卷: Physics Unit21: Electromagnetic Induction & Faraday's Law，类别为 国际高中通用物理
[单选题]
A circular loop of w//r8xgv1oi/2mqfd-q *xt g lrire is rotate-8quxaj f:5xed at constant angular speed about an axis whose direction can be varied. In a region where a uniform ma:x8eq5 xf-au jgnetic field points straight down, what must be the orientation of the loop's axis of rotation if the induced $emf$ is to be a maximum?
A. Any horizontal orientation will do.
B. It must make an angle of $45^{\circ}$ to the vertical.
C. It must be vertical.
D. none of the given answers
参考答案: A
本题详细解析:
暂无
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