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JEE Main 2019 Physics question

PhysicsElectrostatic Potential and CapacitanceJEE Main 2019

A solid conducting sphere, having a charge Q, is surrounded by an uncharged conducting hollow spherical shell. Let the potential difference between the surface of the solid sphere and that of the outer surface of the hollow shell be V. If the shell is now given a charge of −4Q, the new potential difference between the same two surfaces is:

Answer: (C)

Solution

Charge on the shell raises the potential of all points inside it equally, so the potential difference is unchanged: V.

Question ID VK-009209