Answer to Question #176646 in Physics for oliver

Question #176646

A 7 strand aluminium conductor is 1.2 miles long. Its resistance at 35 °C is 2Ω. Determine the diameter of each strand in inches.

Expert's answer

"R=\\rho\\frac{l}{nA}\\\\2=(2.7\\cdot10^{-8})\\frac{1931}{7A}\\\\A=3.7\\cdot10^{-6}\\ m^2=3.7\\ mm^2"

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