A transmission line cable consists of 13 strands of identical copper conductors, each 1.55 mm in diameter. The physical length of the cable is 6 km. But, because of the twist on each strand, the actual lengths of the conductors are increased by 4%. What is the resistance of the cable at 20°C? Inferred zero Temperature Coefficient @ Resistivity @ 20°C Material resistance 20°C 39.06×10-4/°C temperature -236 °C Aluminum 2.83x10-8 Q-m Copper 1.72x10-8 Q-m 39.29×10-4/°C -234.5 °C Silver 1.64×10-8 Q-m 38.02×10-4/°C -243 °C Tungsten 5.5x10-8 Q-m 45.05×10-4/°C -202 °C
A transmission line cable consists of 13 strands of identical copper conductors, each 1.55 mm in diameter. The physical length of the cable is 6 km. But, because of the twist on each strand, the actual lengths of the conductors are increased by 4%. What is the resistance of the cable at 20°C? Inferred zero Temperature Coefficient @ Resistivity @ 20°C Material resistance 20°C 39.06×10-4/°C temperature -236 °C Aluminum 2.83x10-8 Q-m Copper 1.72x10-8 Q-m 39.29×10-4/°C -234.5 °C Silver 1.64×10-8 Q-m 38.02×10-4/°C -243 °C Tungsten 5.5x10-8 Q-m 45.05×10-4/°C -202 °C
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Transcribed Image Text:A transmission line cable consists of 13 strands of identical copper conductors, each 1.55 mm in diameter. The physical length of the cable is 6
km. But, because of the twist on each strand, the actual lengths of the conductors are increased by 4%. What is the resistance of the cable at
20°C?
Inferred zero
Temperature
Coefficient @
Resistivity @
20°C
Material
resistance
20°C
temperature
2.83×10-8 Q-m
39.06×10-4 °C
-236 °C
Aluminum
Copper
1.72x10-8 Q-m
39.29×10-4 °C
-234.5 °C
Silver
1.64x10-8 Q-m
38.02×10-4 °C
-243 °C
Tungsten
5.5x10-8 Q-m
45.05x10-4 /°C
-202 °C
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