कुल आवेश \( q \) और त्रिज्या \( R \) के एक समान रूप से आवेशित पतले गोलीय खोल (शेल) का \( r \) दूरी (\( r < R \)) पर स्थित किसी आंतरिक बिंदु पर विद्युत विभव होता है:

For a uniformly charged thin spherical shell of radius \( R \) and total charge \( q \), the electric field inside the shell (\( r < R \)) is zero (\( E = 0 \)). Since the electric field is related to the electric potential by \( E = -\frac{dV}{dr} \), a zero electric field means that the electric potential remains constant throughout the interior region and is equal to its value at the surface. Therefore, the electric potential at any internal point where \( r < R \) is given by \( V = \frac{1}{4\pi\varepsilon_0} \frac{q}{R} \).