Question

A dipole is placed at the centre of a non-conducting spherical shell of radius r. If the shell is uniformly charged by a surface charge density $\sigma$, then the interaction energy between the dipole and the shell is:

• A. $\frac{\sigma p}{4{\epsilon }_0}$
• B. $\frac{\sigma }{{\epsilon }_0}\frac{p}{r}$
• C. $\frac{\sigma p}{{\epsilon }_0{r}^2}$
• D. Zero

Answer 1

The correct option is D Zero

As its conducting$,$ its an equipotential surface and potential would be $kq/r.$

It would have been a different case if it was an non conducting sphere$.$

hence,

option $\left(D\right)$ is correct answer.