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Question
Why is electrostatic potential constant throughout the volume of the conductor and has the same value (as inside) on its surface?
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Solution
We know that the electric field inside a conductor is zero, so E = 0. This is the reason why
Electrostatic potential is constant, as `E = - (dV)/(dr)`
So, if E = 0
`(dV)/(dr) = 0`
Thus, V = constant
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