本题目来源于试卷: Dielectric Material，类别为 美国物理杯赛(Physics Bowl)
[单选题]
11.42: A parallel-plate capacitor of capacitance Cd;spsh:4dx8p,d/ix)g w y ey+ has an insulatin i+p d+uai s7wgbpo0+p xb)x83 1ely2mn -3oung 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 removes the dielectric from the capacitor. After equilibrium is established following the removal o+le 01 xnpabi-x8b uwp pdis+my3+)237g ou nof 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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