本题目来源于试卷: Electric Potential, Electric Potential,Equipotential Serface，类别为 美国物理杯赛(Physics Bowl)
[单选题]
07.28: Which statement about a syst*/ .y(ju kqoz) zdm.zfuco9/tl0 .emiem of point cha +k;v(e py;4; tmq/tuc tgb1ktrges that are fixed in space is necessarily tre(v1;pgqt/m; y+;4ktckbtutue?
A. If the potential energy of the system is negative, net positive work by an external agent is required to take the charges in the system back to infinity.
B. If the potential energy of the system is positive, net positive work is required to bring any new charge not part of the system in from infinity to its final resting location.
C. If the potential energy of the system is zero, no negative charges are in the configuration.
D. If the potential energy of the system is negative, net positive work by an external agent was required to assemble the system of charges.
E. If the potential energy of the system is zero, then there is no electric force anywhere in space on any other charged particle not part of the system.
参考答案: A
本题详细解析:
暂无
| 
