The resistance (in ohms) of a circular conductor varies directly with the length of the conductor and
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The resistance (in ohms) of a circular conductor varies directly with the length of the conductor and inversely with the square of the radius of the conductor. If 50 feet of wire with a radius of 6 × 10-3 inch has a resistance of 10 ohms, what would be the resistance of 100 feet of the same wire if the radius were increased to 7 × 10-3 inch?
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