Q. A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere respectively are :
A) Zero and $\frac{Q}{4\pi\varepsilon_0 R^2}$
B) $\frac{Q}{4\pi\varepsilon_0 R}$ and Zero
C) $\frac{Q}{4\pi\varepsilon_0 R}$ and $\frac{Q}{4\pi\varepsilon_0 R^2}$
D) Both are zero
Explanation
[Solution] Inside a conductor E = 0 and the potential equals the surface value $\frac{Q}{4\pi\varepsilon_0 R}$. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.