試題詳解

16. A particle with charge IC is at the origin (x = 0.0 m). A particle with charge -4C is at x = 2.0 m on the x axis. What finite value(s) of x is the electric potential zero?
(A) -2 and -2/3,
(B) -2 and 2/3,
(C) -2/3 and 2/3,
(D) -2/3 and 2/5,
(E) 2/3 and 2/5.