Question

The electric potential at a point on the equatorial line of an electric dipole is :

• A. directly proportional to distance
• B. inversely proportional to distance
• C. inversely proportional to square of the distance
• D. none of these

Answer 1

The correct option is D none of these

The electric potential at a distance from the dipole is $V=\frac{1}{4\pi {ϵ}_0}\frac{p\cos \theta }{r^2}$

where $p=$ dipole moment, $r=$ distance of the point from the centre of the dipole, $\theta =$ angle between $p$ and $r$.

For point on the equatorial line, $\theta =\frac{\pi }{2}$. So $V=0$.