Connect one terminal of a D-cell battery to the base of a
Chapter 17, Problem 17.68(choose chapter or problem)
Connect one terminal of a D-cell battery to the base of a ashlight bulb with insulated wire, tape a second wire to the other battery terminal, and tape a third wire to the center conductor of the bulb, as in Figure A17.1. Make sure to remove about 1 cm of insulation from the ends of all wires before making the connections. Now bridge the gap between the open wires with different objects, such as a plastic pen, an aluminum can, a penny, a rubber band, and a spoon. Which objects make the bulb light up? Explain your observations.
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