The electrical resistance of a cable varies directly as its length and inversely as the square of its diameter. If a cable 600 m long and 10 mm in diameter has a resistance of 0.1 ohm, find the length of a cable 20 mm in diameter with a resistance of 0.15 ohm.
The electrical resistance of a cable varies directly as its length and inversely as the square of its diameter. If a cable 600 m long and 10 mm in diameter has a resistance of 0.1 ohm, find the length of a cable 20 mm in diameter with a resistance of 0.15 ohm.
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter28: Current And Resistance
Section: Chapter Questions
Problem 67PQ
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The electrical resistance of a cable varies directly as its length and inversely as the square of its diameter. If a cable 600 m long and 10 mm in diameter has a resistance of 0.1 ohm, find the length of a cable 20 mm in diameter with a resistance of 0.15 ohm.
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