A point charge Q is placed at the centre of an uncharged spherical shell of inner radius a and outer radius b. There is a small tunnel in the body of

Monjur Alahi

A point charge Q is placed at the centre of an uncharged spherical shell of inner radius a and outer radius b. There is a small tunnel in the body of the shell. Calculate the work done to transfer the charge through the tunnel to infinity.
[Hint: Remove the charge bit by bit and calculate the total work done.]


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Salim Ahmed Kawsar

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Correct Answer - `(Q^(2))/(8piepsilon_(0))((1)/(a)-(1)/(b))`

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