Answered: Question 7 A 2.0 mm diameter wire of…

Question 7 A 2.0 mm diameter wire of length 20 m has a resistance of 0.25 2. What is the resistivity of the wire? 0.25 2.m 5.0 × 10-7.m 3.9 × 10-8 Q.m 4.0 × 10-7.m x 10-8 Q.m O 16 ×

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section: Chapter Questions

Problem 17P: A potential difference of 12 V is found to produce a current of 0.40 A in a 3.2-m length of wire...

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

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