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.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 15P: If the current carried by a conductor is doubled, what happens to (a) the charge carrier density,...

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