Some wire of cross-sectional area 1mm? has a resistance of 20a. Determine (a) the resistance of a wire of the same length and material if the cross-sectional area is 4mm2, and (b) the cross-sectional area of a wire of the same length and material if the resistance is 32n.

Some wire of cross-sectional area 1mm? has a resistance of 20a. Determine (a) the resistance of a wire of the same length and material if the cross-sectional area is 4mm2, and (b) the cross-sectional area of a wire of the same length and material if the resistance is 32n.

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 21P

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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.

Question

9. Some wire of cross-sectional area 1mm2 has a resistance of 202. Determine (a)
the resistance of a wire of the same length and material if the cross-sectional
area is 4mm2, and (b) the cross-sectional area of a wire of the same length and
material if the resistance is 32n.

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