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]
10.37: A positively chargemm3136ek gc sud particle is moved in a straight line t lhhjfzl*/k 2 x8ru:t:o the right from position x = −4.0 m to position x = −2.0 m by an external agent. The electric potential at these positions in space are V(x = −4m) = −4.0 Volts and V(x = −2m) = −2.0 Volts. Which statement is true about the work done by the external agent moving the charge between these posithlr8xfkh u* z 2jl::t/ions and the electric field component parallel to the direction of motion that the moving charged particle experiences? Assume the particle is moved at constant speed.
A. The external agent does no work since the speed was constant.
B. The external agent does negative work and the electric field is directed to the right.
C. The external agent does positive work and the electric field is directed to the right.
D. The external agent does negative work and the electric field is directed to the left.
E. The external agent does positive work and the electric field is directed to the left.
参考答案: E
本题详细解析:
暂无
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