Problem 1. A copper wire of cross-sectional area 2.5 mm2 carries a current with a current density of 2.60 A/mm2 . The density of free electrons for copper is 9.5x1028 electrons per cubic meter. The resistivity of copper is 1.68x10−8 ·m. The charge of the electron is 1.6x10−19 C. (a) Calculate the current in the wire. (b) The magnitude of the drift velocity of electrons in the wire. (c) Find the electric field inside the wire.

Problem 1. A copper wire of cross-sectional area 2.5 mm2 carries a current with a current density of 2.60 A/mm2 . The density of free electrons for copper is 9.5x1028 electrons per cubic meter. The resistivity of copper is 1.68x10−8 ·m. The charge of the electron is 1.6x10−19 C. (a) Calculate the current in the wire. (b) The magnitude of the drift velocity of electrons in the wire. (c) Find the electric field inside the wire.

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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