A certain wire has a resistance of R. The resistance of another wire identical with the first except for having thrice its radius is?

EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN:9781337516549
Author:Simmons
Publisher:Simmons
Chapter27: Service-entrance Equipment
Section: Chapter Questions
Problem 44R
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A certain wire has a resistance of R. The resistance of another wire identical with the first except for having thrice its radius is?

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