Answered: A copper wire has a resistance of 0.480…

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 12CQ: Explain why R=R0(1 + a?T) for the temperature variation of the resistance R of an object is not as...

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A copper wire has a resistance of 0.480 Ω at 20.0°C, and an iron wire has a resistance of 0.519 Ω at the same temperature. At what temperature are their resistances equal? The temperature coefficient of resistivity for copper is 3.90 10^-3(°C)⁻¹ and for iron it is 5.00 10^-3(°C)⁻¹.
_____°C

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$W e h a v e g i v e n R e s i s \tan c e o f c o p p e r w i r e (R_{c}) = 0.480 o h m T e m p e r a t u r e (T) = 20 ° C R e s i s \tan c e o f I r o n w i r e (R_{i}) = 0.519 o h m$

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