A copper wire of radius a = 0.161 mm has an aluminum jacket of outer radius b = 0.218 mm. There is a current i = 1.58 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 × 10-8-m and 2.75 × 10-8-m. Calculate the current in (a) the copper and (b) the aluminum. (c) If a potential difference V = 11.8 V between the ends maintains the current, what is the length in meters of the composite wire?

A copper wire of radius a = 0.161 mm has an aluminum jacket of outer radius b = 0.218 mm. There is a current i = 1.58 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 × 10-8-m and 2.75 × 10-8-m. Calculate the current in (a) the copper and (b) the aluminum. (c) If a potential difference V = 11.8 V between the ends maintains the current, what is the length in meters of the composite wire?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 31P: Consider a wire of a circular cross-section with a radius of R = 3.00mm. The magnitude of the...

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