A positively charged rod is brought near an uncharged pith b

A positively charged rod is brought near, an uncharged pith ball that is being touched by a copper wire. Both the rod and the copper -wire are simultaneously removed, and the pith ball is tested to find if any electrostatic charge is present. What is the result? The pith ball has been positively charged by conduction. The pith ball has been positively charged by induction. The pith ball has been negatively charged by conduction. The pith ball has been negatively charged by induction. The pith ball has not been charged in any way

Solution

When the rod is brought near the pith ball the near side is induced with –ve charge and the far side will have a +ve charge, the positive charge flows into the copper wire as it is touched.

When the rod and the wire are simultaneously removed the –ve charge on the ball remains.

C) The pith ball is –vely charged by conduction