Question Detail
Question
A charge q is placed at the centre of a conducting spherical shell. What is the charge on the inner surface of the shell?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Electrostatic induction: the free charges in the (initially neutral) conducting shell rearrange so field lines from q terminate on the inner surface. The induced inner-surface charge is -q (and, to keep the shell neutral overall, the outer surface carries +q).
Hint
Electrostatic induction: the free charges in the (initially neutral) conducting shell rearrange so field lines from q terminate on the inner surface.