問題詳情

33. A stationary negative electric charge is shown below between the poles of a stationary horseshoemagnet. The magnetic force on the charge 


(A) zero
(B) points downward
(C) points into the paper
(D) points out of the paper

參考答案

答案：A
難度：非常困難0
統計：A(0),B(0),C(0),D(1),E(0)