Q. A hollow conducting sphere or radius R has a charge (+Q) on its surface. What is the electric potential within the sphere at a distance r = R /3 from its centre?
A) $\frac{1}{4\pi\varepsilon_{0}}.\frac{Q}{r}$
B) $\frac{1}{4\pi\varepsilon_{0}}.\frac{Q}{r^{2}}$
C) $\frac{1}{4\pi\varepsilon_{0}}.\frac{Q}{R}$
D) Zero
Explanation
(c) Electric potential inside the hollow conducting sphere is constant and equal to potential at the surface of the sphere$\ = \frac{Q}{4\pi\varepsilon_{0}R}$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.