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 cqfff 6hd)5 sbp60lcj/ ap qgqkp5w0 td:2.bb3)vfu-jbigi 8 7lsacitance 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 removes the dielectric from the capacitor. After equilibrium is established following the removal of the dielectric, which one of the following choices best rqub d )if i5b0b3 gkg7jvt-.wp2:8slqepresents 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
| 
