Question

A conducting hollow sphere of radius $0.1$ m is given a charge of $10\mu C$. The electric potential on the surface of sphere will be :

• A. $\text{z}ero$
• B. $3\times {10}^{5}V$
• C. $9\times {10}^{5}V$
• D. $9\times {10}^{9}V$

Answer 1

The correct option is C $9\times {10}^{5}V$

The electric potential at the surface of sphere is $V=\frac{Q}{4\pi {ϵ}_{0}R}$

$V=\frac{10\times {10}^{-6}}{4\times 3.14\times 8.854\times {10}^{-12}\times 0.1}=9\times {10}^{5}V$