A copper wire is carrying 5.0 A of current. Given that the electric field between the ends of the cable has a value of 0.75 V/m. (a) find the current density in the wire. (b) the drift speed of the mobile charges. (c) If a potential difference of 20.0 V is applied. Find the resistance, length and cross-sectional area of the cable. Note: the density of copper D=8960 kg/m3, and the molar mass of the copper is m=0.063 kg/mol. Assume each atom of contributes with one electron.

A copper wire is carrying 5.0 A of current. Given that the electric field between the ends of the cable has a value of 0.75 V/m. (a) find the current density in the wire. (b) the drift speed of the mobile charges. (c) If a potential difference of 20.0 V is applied. Find the resistance, length and cross-sectional area of the cable. Note: the density of copper D=8960 kg/m3, and the molar mass of the copper is m=0.063 kg/mol. Assume each atom of contributes with one electron.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 28P: An aluminum wire 1.628 mm in diameter (14-gauge) carries a current of 3.00 amps, (a) What is the...

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