CBSE Class 12-science Answered

A charged polythene rod can be used to transfer charge onto an insulated conductor without the two object coming into contact. The negatively charged polythene rod is brought close to the conductor. The electrons within the conductor are repelled by the charged polythene rod and the positive ions are attracted to the polythene rod. The conductor has a separation of charge on it. If the negatively charged side is momentarily earthed, the negative charge is able to flow to earth but the positive charge remains attracted to the negatively charged polythene rod. When the rod is taken away from the conductor, the positive charge on the conductor distributes itself evenly around the surface of the conductor leaving it charged.