(a) What will you observe in Figure-I ?
(b) What will you observe in Figure-II ?
© What conclusion will you draw ?
A.(a) In the figure-I the thermocole ball will be attracted to the glass rod.
(b) In the figure-II the thermocole ball will be repelled due to similar charge.
© The conclusion we draw is that attraction between two bodies is not a sure test of the presence of charge on a body. Repulsion is a sure that of charge on a body.