A hollow metallic sphere of radius $R$ is given a charge $Q$. Then the potential at the centre is
A hollow metallic sphere of radius $R$ is given a charge $Q$. Then the potential at the centre is
- A
Zero
- B
$\frac{1}{{4\pi {\varepsilon _0}}}.\frac{Q}{R}$
- C
$\frac{1}{{4\pi {\varepsilon _0}}}.\frac{{2Q}}{R}$
- D
$\frac{1}{{4\pi {\varepsilon _0}}}.\frac{Q}{{2R}}$
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