A tungsten wire has a radius of 0.093 mm and is heated from 20.0 to 1322 °C. The temperature coefficient of resistivity is a -4.5 x 10 3 (Cº)-¹. When 110 V is applied across the ends of the hot wire, a current of 2.3 A is produced. How long is the wire? Neglect any effects due to thermal expansion of the wire.
A tungsten wire has a radius of 0.093 mm and is heated from 20.0 to 1322 °C. The temperature coefficient of resistivity is a -4.5 x 10 3 (Cº)-¹. When 110 V is applied across the ends of the hot wire, a current of 2.3 A is produced. How long is the wire? Neglect any effects due to thermal expansion of the wire.
Chapter9: Current And Resistance
Section: Chapter Questions
Problem 28P: An aluminum wire 1.628 mm in diameter (14-gauge) carries a current of 3.00 amps, (a) What is the...
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