本题目来源于试卷: Electricity and Circuits: Dielectric Material，类别为 美国物理杯赛(Physics Bowl)
[单选题]
11.42: A parallel-plate capacitor ofj3t .f6don sxqn/1a8x capaci +5do-8f 9xsva1m zfpyn.h)tstance C has an insulating dielectric material of constant K filling the entire region between its plates. This capacitor now is connected to a battery of voltage V and is fully charged before the battery is disconnected. The capacitor stores energy U. Using insulating gloves, a person now r1zhy n)+. osp5xd mfv-a89ft semoves the dielectric from the capacitor. After equilibrium is established following the removal of the dielectric, which one of the following choices best represents the energy stored by the capacitor in terms of U?
A. $K^{2}U$
B. $KU$
C. $U$
D. $U/K$
E. $U/K^{2}$
参考答案: B
本题详细解析:
暂无
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