Question

Figure below shows a metal rod AB placed on an insulating stand. In figure (a) a negatively charged an ebonite rod C is touched with the metal rod AB, while in figure (b), the negatively charged ebonite rod C is held near the rod AB. State the kind of charges at the ends A and B of the rod, in each case.

Answer 1

In figure (a) conduction takes place. There is negative charge at both ends A and B

In figure (b) Induction takes place.

End A has an oppositely positive charge called Bound charge and End B is similarly charged i.e. negative free charge.