Question
Question: A table tennis ball which has been covered with conducting paint is suspended by a silk thread so th...
A table tennis ball which has been covered with conducting paint is suspended by a silk thread so that it hang between two plates, out of which one is earthed and other is connected to a high voltage generator. This ball –
A
Is attracted towards high voltage plate and stays there
B
Hangs without moving
C
Swings backward and forward hitting each plate in turn
D
Is attracted to earthed plate and stays there
Answer
Swings backward and forward hitting each plate in turn
Explanation
Solution
Due to induction ball is attracted towards one plate, when ball closed to plate and touches charges are shared and there will be repulsion.