A metallic spherical shell has an inner radius $R_1$ and outer radius $R_2$. A charge $Q$ is placed at the centre of the spherical cavity. What will be surface charge density on the inner surface
A metallic spherical shell has an inner radius $R_1$ and outer radius $R_2$. A charge $Q$ is placed at the centre of the spherical cavity. What will be surface charge density on the inner surface
- A
$\frac{Q}{{4\pi R_1^2}}$
- B
$ - \frac{Q}{{4\pi R_1^2}}$
- C
$\frac{Q}{{4\pi R_2^2}}$
- D
$ - \frac{Q}{{4\pi R_2^2}}$
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