Q. A table tennis ball which has been covered with a conducting paint is suspended by a silk thread so that it hangs between two metals plates. One plate is earthed. When the other plate is connected to a high voltage generator, the ball
(a) Is attached to the high voltage
(b) Hangs without moving
(c) Swings backward and forward hitting the plates
(d) Is repelled to the earthed plate and stays there
Ans: (C)