12. A particle with charge $q1 = -40.0 \, \text{nC}$ is located on the x-axis at $x = 0.0$. A second particle, with charge $q2 = -20.0 \, \text{nC}$, is located on the x axis at $x = 0.5 \, \text{m}$. Is there a point at a finite distance where the electric potential due to these two charges is zero?
(A) Yes; it is to the left of $x = 0.0$ along x axis.
(B) Yes; it is between $x = 0.0$ and $x = 0.5 \, \text{m}$ along x axis.
(C) Yes; it is to the right of $x = 0.5 \, \text{m}$ along x axis.
(D) Yes; but not along the x axis
(E) No.

答案：登入後查看
統計： 尚無統計資料