A potential is placed across a wire. When the potential is 300 V and the wire is 14.5 m long, the current density through the wire is 1.3 x 104 A/m2. What is the resistivity of the wire? Put your answer in Ω.m.

A potential is placed across a wire. When the potential is 300 V and the wire is 14.5 m long, the current density through the wire is 1.3 x 104 A/m2. What is the resistivity of the wire? Put your answer in Ω.m.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section: Chapter Questions

Problem 58AP

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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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