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

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section17.1: Electric Current

Problem 17.1QQ: Consider positive and negative charges all moving horizontally with the same speed through the four...

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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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Express answer/s in mks (SI) .

Draw diagram whenever necessary

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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