A metal ball of radius $R$ is placed concentrically inside a hollow metal sphere of inner radius $2R $ and outer radius $3R$. The ball is given a charge $+2Q$ and the hollow sphere a total charge $- Q$. The electrostatic potential energy of this system is :
A metal ball of radius $R$ is placed concentrically inside a hollow metal sphere of inner radius $2R $ and outer radius $3R$. The ball is given a charge $+2Q$ and the hollow sphere a total charge $- Q$. The electrostatic potential energy of this system is :
- A
$\frac{{7{Q^2}}}{{24\pi {\varepsilon _0}R}}$
- B
$\frac{{5{Q^2}}}{{16\pi {\varepsilon _0}R}}$
- C
$\frac{{5{Q^2}}}{{8\pi {\varepsilon _0}R}}$
- D
None
Similar Questions
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- [AIIMS 2000]
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