College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Two wires A and B with circular cross-section are made of the same metal and have equal lengths, but the resistance of wire A is four times greater than that of wire B. What is the ratio of the cross-sectional area of A to that of B? (AA / AB) What is the ratio of the radius of A to that of B ? |(rA/ rB)
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Transcribed Image Text:Two wires A and B with circular cross-section are made of the same metal and have equal lengths, but the resistance of wire A is four times greater than that of wire B. What is the ratio of the cross-sectional area of A to that of B? (AA / AB) What is the ratio of the radius of A to that of B ? |(rA/ rB)
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