Question Detail
Question
A thin uncharged conducting spherical shell has a charge q carefully placed at its centre through a small hole in the shell. The charge q does not touch the shell. What is the net charge on the shell?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Electrostatic induction causes -q to appear on the inner surface and +q on the outer surface of the (originally neutral) shell, so the shell's net charge remains 0.
Hint
Remember the shell started out neutral — induction redistributes charge on its surfaces but doesn't add or remove any net charge.