A piece of resistance wire, 15.6 m long and cross-sectional area 12mm2 at a temperature of 0°C, passes a current 0f 7.9 A when connected to DC supply at 240V. Calculate (a) resistivity of the wire (b) the current which will flow when the temperature rises to 55°C. The temperature coefficient of the resistance wire at 0°C is 0.00029.
A piece of resistance wire, 15.6 m long and cross-sectional area 12mm2 at a temperature of 0°C, passes a current 0f 7.9 A when connected to DC supply at 240V. Calculate (a) resistivity of the wire (b) the current which will flow when the temperature rises to 55°C. The temperature coefficient of the resistance wire at 0°C is 0.00029.
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter29: Direct Current (dc) Circuits
Section: Chapter Questions
Problem 19PQ
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A piece of resistance wire, 15.6 m long and cross-sectional area 12mm2 at a temperature of 0°C, passes a
current 0f 7.9 A when connected to DC supply at 240V. Calculate (a) resistivity of the wire (b) the current
which will flow when the temperature rises to 55°C. The temperature coefficient of the resistance wire at
0°C is 0.00029.
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