A popular physics lab involves a hand generator and an assortment of wires with different values of resistance. In the lab, the leads of the generator are connected across each wire in turn. For each wire, students attempt to turn the generator handle at the same constant rate.
You find that you must push harder on the handle when the leads of the generator are connected .
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A popular physics lab involves a hand generator and an assortment of wires with different values of...
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