A 100-cm-long copper wire of radius 0.50 cm has a
Chapter 17, Problem 17.26(choose chapter or problem)
A 100-cm-long copper wire of radius 0.50 cm has a potential difference across it sufcient to produce a current of 3.0 A at 20C. (a) What is the potential difference? (b) If the temperature of the wire is increased to 200C, what potential difference is now required to produce a current of 3.0 A?
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