A high-voltage power transmission line is 200 km long, and is constructed of aluminium cable of diameter 30 mm. What is the resistance of this length of cable? (Resistivity of aluminium is 2.8x108 2m.)

A high-voltage power transmission line is 200 km long, and is constructed of aluminium cable of diameter 30 mm. What is the resistance of this length of cable? (Resistivity of aluminium is 2.8x108 2m.)

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter27: Current And Resistance

Section: Chapter Questions

Problem 27.79AP

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

13)
A high-voltage power transmission line is 200 km long, and is constructed of aluminium
cable of diameter 30 mm. What is the resistance of this length of cable? (Resistivity of
aluminium is 2.8x10-8 2m.)

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