Most telephone cables are made of copper wire of either 24 or 26 gauge. If the resistance of 24-gauge wire is 137 ohm /mile and the resistance of 26-gauge wire is 220 ohm /mile, what is the ratio of the diameter of 24-gauge wire to that of 26-gauge wire?

Most telephone cables are made of copper wire of either 24 or 26 gauge. If the resistance of 24-gauge wire is 137 ohm /mile and the resistance of 26-gauge wire is 220 ohm /mile, what is the ratio of the diameter of 24-gauge wire to that of 26-gauge wire?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 42P: What current flows through a 2.54-cm-diameter rod of Pure silicon that is 20.0 cm long, when 1.00103...

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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

Most telephone cables are made of copper wire of
either 24 or 26 gauge. If the resistance of 24-gauge
wire is 137 ohm /mile and the resistance of 26-gauge
wire is 220 ohm /mile, what is the ratio of the
diameter of 24-gauge wire to that of 26-gauge wire?
Select one:
а.
1.6
b. 1.3
c. 0.88
d. 0.79
е. 0.62

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