Plastic insulation surrounds a wire having diameter d and length l as shown above. A decrease in the resistance of the wire would be produced by an increase in the
A. length l of the wire
B. diameter d of the wire
C. temperature of the wire
D. thickness of the plastic insulation.
Correct answer is option B. Diameter d of the wire. Explanation: Plastic insulation surrounds a wire having diameter d and length l as shown above. A decrease in the resistance of the wire would be produced by an increase in the diameter d of the wire.
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