5. A piece of wire of cross-sectional area 2 mm2 has a resistance of 300 ohms. Find (a) the resistance of a wire of the same length and material if the cross- sectional area is 5 mm2, (b) the cross-sectional area of a wire of the same length and material of resistance 750 ohms.
5. A piece of wire of cross-sectional area 2 mm2 has a resistance of 300 ohms. Find (a) the resistance of a wire of the same length and material if the cross- sectional area is 5 mm2, (b) the cross-sectional area of a wire of the same length and material of resistance 750 ohms.
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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