Mathematics, 18.02.2021 02:00, izzyisawesome5232

The resistance of a wire varies directly as its length and inversely as the square of its diameter. A wire 50 m long and 0.01 m in diameter has a resistance of 25 ohms. Find the resistance of a wire made of the same material that is 20 m long and has diameter 0.02 m.

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The resistance of a wire varies directly as its length and inversely as the square of its diameter....