Get premium membership and access revision papers with marking schemes, video lessons and live classes.

Processing. Please wait.

A positively charged sphere is suspended by an insulating thread. A negatively charged conductor is suspended near it. The conductor is first attracted, after touching the sphere it is repelled. Explain this observation.

Answer Text:
The conductor is initially attracted because of opposite charge. It is neutralized and then acquires same charges as the sphere hence the repulsion.