opposite polarization
Figure 18.15 Both positive and negative objects attract a neutral object by polarizing its molecules. a A positive object brought near a neutral insulator polarizes its molecules. There is a slight shift in the distribution of the electrons orbiting the molecule, with unlike charges being brought nearer and like charges moved away. Since the electrostatic force decreases with distance, there is a net attraction. b A negative object produces the opposite polarization, but again attracts the neutral object. c The same effect occurs for a conductor; since the unlike charges are closer, there is a net attraction.