Solved: A tungsten wire has a radius of 0.075 mm and is
Chapter 20, Problem 20.81(choose chapter or problem)
A tungsten wire has a radius of 0.075 mm and is heated from 20.0 to 1320 C. The temperature coefficient of resistivity is 4.5 103 (C ) 1 . When 120 V is applied across the ends of the hot wire, a current of 1.5 A is produced. How long is the wire? Neglect any effects due to thermal expansion of the wire. *
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