Two copper wires of different diameter are joined end-to-end, and a current flows in the wire combination. When electrons move from the larger-diameter wire into the smaller-diameter wire, Q25.1 A. their drift speed increases. B. their drift speed decreases. C. their drift speed stays the same. D. not enough information given to decide
Electrons in an electric circuit pass through a resistor. The wire has the same diameter on each side of the resistor. Compared to the potential energy of an electron before entering the resistor, the potential energy of an electron after leaving the resistor is A. greater. B. less. C. the same. D. not enough information given to decide Q25.3
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