Answer to Question #294557 in Physics for sana

Question #294557

A 3000-km long cable consists of 7 turns, with diameter of 0.73mm each. Calculate the resistance R of the cable. The resistivity of the copper wire is 3x10^-6Ω.cm.

Expert's answer

The resistance is

"R=\\dfrac{4n\\rho L}{\\pi d^2}=150\\text M\\Omega."

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