2- A copper wire of 3mm diameter with conductivity of 6.7 * 107 (Q.m)1 , and electron mobility of 0.0064 m2 /V sec. Is subjected to an electric field of 30 mV/m. Find (a) the charge density of free electrons, (b) the current density, (c) current flowing in the wire, (d) the electron draft velocity.

2- A copper wire of 3mm diameter with conductivity of 6.7 * 107 (Q.m)1 , and electron mobility of 0.0064 m2 /V sec. Is subjected to an electric field of 30 mV/m. Find (a) the charge density of free electrons, (b) the current density, (c) current flowing in the wire, (d) the electron draft velocity.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

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Question

2- A copper wire of 3mm diameter with conductivity of 6.7 * 107 (2.m)1 , and
electron mobility of 0.0064 m2 V sec. Is subjected to an electric field of 30
mV/m.
Find (a) the charge density of free electrons,
(b) the current density,
(c) current flowing in the wire,
(d) the electron draft velocity.

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