A metal wire 3.50 m long has a circular cross section of radius 0.54 mm and an end-to-end resistance of 70.0 Ohms. The metal wire is then stretched uniformly so that its cross-section is still circular but its total length is now 22.75 m. What is the resistance of the wire after stretching? (Units: Ohm.) (I keep getting 455 Ohm, but that is incorrect.)

A metal wire 3.50 m long has a circular cross section of radius 0.54 mm and an end-to-end resistance of 70.0 Ohms. The metal wire is then stretched uniformly so that its cross-section is still circular but its total length is now 22.75 m. What is the resistance of the wire after stretching? (Units: Ohm.) (I keep getting 455 Ohm, but that is incorrect.)

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 70AP: A 10.00-meter long wire cable that is made of copper has a resistance of 0.051 ohms, (a) What is the...

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