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-pla-.b ;8gm1mp8sgyc m8r raz yby.d6y-t te drmzrron)r -qyq9 53t-ec r:* capacitor of capacitance 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 represents the energy stored by the capacitor)r 9o- ec3ym:r5rrnq- r qdz*t 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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