Two equal metal spheres of radius 10 cm are joined together by a long fine wire. They are insulated and electrified by a battery of e.m.f. 10 V. Connection with the battery is not disturbed. If now one of the spheres contract to one-fourth its original surface, will the system consisting of the two spheres draw or give charge to the battery? by how much? What amount of charge was taken by the system in the beginning?
