Four identical charges are placed at the points `(1,0,0), (0,1,0),(-1,0,0)`, and `(0,-1,0)`. Then,

Options

A. the potential at the origin is zero
B. the electric field at the origin is not zero.
C. the potential at all points on the z - axis, other than the origin, is zero
D. the field at all points on the z - axis, other than the origin acts along the z - axis.

Answer

d

Explanation

All the charges are placed in the x y plane such that they form a square with origin as its center. So electric field at the origin will be zero, but at other points on z - axis.