A copper wire is (50 m) long, and has a cross-sectional area of (5 mm2). a/ Calculate the resistance of this wire at a temperature of ( 30°C), if you know that the resistivity of copper at this temperature equal to (1.8× 10-8 Q m). b/ What is the resistance of the wire if heated to (90°C)? Note that the resistivity of copper at a temperature of ( 20°C) equal to (1.724x 10-8 Q m), and the temperature coefficient of resistivity of copper is (0.004 C)?

A copper wire is (50 m) long, and has a cross-sectional area of (5 mm2). a/ Calculate the resistance of this wire at a temperature of ( 30°C), if you know that the resistivity of copper at this temperature equal to (1.8× 10-8 Q m). b/ What is the resistance of the wire if heated to (90°C)? Note that the resistivity of copper at a temperature of ( 20°C) equal to (1.724x 10-8 Q m), and the temperature coefficient of resistivity of copper is (0.004 C)?

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.2P: The temperature dependence of resistance is also quantified by the relation R2=R1[ 1+(T2T1) ] where...

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