本题目来源于试卷: Physics Unit21: Electromagnetic Induction & Faraday's Law，类别为 通用国际物理
[单选题]
A circular loop of wire is ,5: edv kjb1czrop/g 9 zw n4:oz.)tmerqtated at constant angular speed about an axis whose direction can be varied. nem/q w o9g:z)p4zr.tIn a region where a uniform magnetic field points straight down, what must be the orientation of the loop's axis of rotation if the induced $emf$ is to be zero?
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: C
本题详细解析:
暂无
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