Q2] A copper wire of 3mm diameter with conductivity of 5.8 10 (2.m)", and electron mobility of 0.0032 m V.Sec, is subjected to an electric field of 30mVm. Find (a) the charge density of free electrons, (b) current flowing in the wire, (c) the electron draft velocity,

Q2] A copper wire of 3mm diameter with conductivity of 5.8 10 (2.m)", and electron mobility of 0.0032 m V.Sec, is subjected to an electric field of 30mVm. Find (a) the charge density of free electrons, (b) current flowing in the wire, (c) the electron draft velocity,

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter27: Current And Resistance

Section: Chapter Questions

Problem 27.3CQ: When the potential difference across a certain conductor is doubled, the current is observed to...

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

Q2] A copper wire of 3mm diameter with conductivity of 5.8 10 (2.m)", and clectron mobility of 0.0032 m
V.Sec, is subjected to an electric field of 30mVm. Find (a) the charge density of free electrons, (b) current
flowing in the wire, (c) the clectron draft velocity,

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