本题目来源于试卷: Gauss Law and Metal in Eclectic Equilibrium，类别为 美国物理杯赛(Physics Bowl)
[单选题]
05.20: A portable radio that is playing is p kt.x r5y4khtzc :4h 5zlaced in ip e68i(0zk sud2e)n -9cjeiaside a screen cage as shown. When inside the cage the radio stops playing because a6idj0eezp i-2iu )e c98nk( s
A. the electric potential of the batteries is neutralized.
B. the charge on the radio is zero.
C. the sound cannot travel through the cage
D. the electric field of the radio waves cannot penetrate the cage.
E. none of the above reasons.
参考答案: D
本题详细解析:
暂无
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