A copper wire has a square cross section 2.3 mm on a side. The wire is 4.0 m long and carries a current of 3.6 A. The density of free electrons is 8.5 x1028/m3 Find the magnitudes of (a) the current density in the wire (b) the electric field in the wire (c) How much time is required for an electron to travel the length of the wire? For copper: p = 1.72 x10-82. m n = 8.5 x1028/m3

A copper wire has a square cross section 2.3 mm on a side. The wire is 4.0 m long and carries a current of 3.6 A. The density of free electrons is 8.5 x1028/m3 Find the magnitudes of (a) the current density in the wire (b) the electric field in the wire (c) How much time is required for an electron to travel the length of the wire? For copper: p = 1.72 x10-82. m n = 8.5 x1028/m3

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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