A solid metal wire has a certain resistance. It is heated and carefully stretched to form a longer, thinner wire. After it cools, the resistance is than it was before. A. The resistance will be the same since the resistance is independent of the length and cross-sectional area. Increasing the length and shrinking the radius will not affect the resistance. B. The resistance will be greater since the resistance is proportional to length and inversely proportional to cross-sectional area. C. Increasing the length and shrinking the radius both act to increase the resistance. D. The resistance will be less than before since the resistance is inversely proportional to length and proportional to cross-sectional area. E. Increasing the length and shrinking the radius both act to decrease the resistance.
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A solid metal wire has a certain resistance. It is heated and carefully stretched to form a longer,...
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