An iron wire with cross-section 2,9 × 10–6 m² carries current 144 A. Find the drift velocity Va, in units of milimeters per second, by assuming the existence of two carriers per iron atom. Hint: First, calculate number density n of the charge carriers.

An iron wire with cross-section 2,9 × 10–6 m² carries current 144 A. Find the drift velocity Va, in units of milimeters per second, by assuming the existence of two carriers per iron atom. Hint: First, calculate number density n of the charge carriers.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 65PQ

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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.

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An iron wire with cross-section 2,9 × 10-º m² carries current 144 A. Find the drift velocity Va, in units of milimeters per second, by
assuming the existence of two carriers per iron atom.
Hint: First, calculate number density n of the charge carriers.

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