Consider a negatively charged rubber rod brought near a neutral conducting sphere that is insulated. The repulsive force between the electrons in the rod and those in the sphere causes a redistribution of charge on the sphere so that some electrons move to the side of the sphere farther away from the rod. The region of the sphere nearest the negatively charged rod has an excess of positive charge because of the migration of electrons away from this location. If grounded conducting wire is then connected to the sphere, some of the electrons leave the sphere and travel to ground. If the wire to the ground is then removed, the conducting sphere is left with an excess of induced positive charge, and when the rubber rod is removed, the induced positive charge remains on the ungrounded sphere, and this way of charging is called charging by induction.