Question

A point charge is kept at the centre of a metallic insulated spherical shell

Answer 1

Explanation:

The net charge induced is zero for an isolated spherical shell since the spherical shell can't acquire or give up charge.

It's like a poker game with your friends, the money can only move around. Some might lose money some might gain money but the net change in money for all of you is zero.

If the spherical shell were grounded or held at a constant potential things would be different because charge could flow to or from the shell.

Answer 2

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The charge comes out in the surface of sphere and total charge inside cell become 0

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