Question

A and B are two points on the axis and the perpendicular bisector respectively of an electric dipole. A and B are far away from the dipole and at equal distances from it. The potentials at A and B are $V_A$ and $V_B$ respectively. Then,

• A. $V_A=V_B=0$
• B. $V_A=2V_B$
• C. $V_A\ne 0,V_B=0$
• D. $V_A\ne 0,V_B\ne 0$

Answer 1

The correct option is C $V_A\ne 0,V_B=0$

The potential at $A$ and $B$ are $V_A$ and $V_B$ respectively.

If $A$ and $B$ are two points on the axis and the perpendicular bisector respectively of an electric dipole then

$V_A\ne 0,V_B=0$

because, for the perpendicularity $\cos \theta$ will be $0$.