Induced charges

• Charging a body involves the addition or removal of electrons.
• A charge that “appears” on an uncharged object does so because of a charged object nearby
• if a positively charged rod is brought near a small piece of aluminum foil, electrons in foil are pulled towards rod, which leaves the bottom of the foil with a net positive charge. The attraction is stronger than repulsion because the attracting charges are closer than the repelling ones.