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 r2 2tyxvufe;;cdj gcosv)x /-;otated at constant angular speed about an axsgedc1adz- +jo ; 7 50,v shuxr7(bkdais whose direction can be varied. In a region where a uniform magnetic field points st;zcs0rb7+j 1ga-dxs5 o ,ddk(hu7v ea raight 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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