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    Physics for Scientists and Engineers
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    Exam 25: Electric Current and Direct-Current Circuits
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    By What Percentage Does the Resistance of a Copper Wire\(\alpha\)
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By What Percentage Does the Resistance of a Copper Wire α\alphaα

Question 12

Question 12

Multiple Choice

By what percentage does the resistance of a copper wire ( α\alphaα = 3.9 ×\times× 10-3/K) increase when its temperature increases from 20 to 75ºC?


A) 11%
B) 14%
C) 22%
D) 31%
E) 57%

Correct Answer:

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