Electric potential inside hollow charged sphere of radius ‘r’ is ________ $\left[\mathrm{k}=\frac{1}{4{\mathrm{\pi \epsilon }}_0}\right]$

Inside a metallic sphere, electric field is zero. This is known as electrostatic shielding.

As, electric field inside the metallic sphere is zero, potential inside the sphere is equal to that at the surface i.e. potential inside the sphere is:

$$\begin{gathered} \mathrm{V}=\frac{\mathrm{Q}}{4{\mathrm{\pi \epsilon }}_0\mathrm{R}} \\ \mathrm{V} = \frac{{\displaystyle \mathrm{kQ}}}{\mathrm{R}} \end{gathered}$$