3. A 2.0 mm diameter iron wire carries a current of 2.5 A. Determine : a.) the electric field magnitude in the wire potential difference between 2 points in the wire 20 m apart. c.) the resistance of this 20m length of the wire. b.) the

3. A 2.0 mm diameter iron wire carries a current of 2.5 A. Determine : a.) the electric field magnitude in the wire potential difference between 2 points in the wire 20 m apart. c.) the resistance of this 20m length of the wire. b.) the

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 3CQ: If two different wires having identical cross-sectional areas carry the same current, will the drift...

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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

3. A 2.0 mm diameter iron wire carries a current of 2.5 A. Determine : a.) the electric field magnitude in the wire
potential difference between 2 points in the wire 20 m apart. c.) the resistance of this 20m length of the wire.
b.) the

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