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Determine the resistance, in milliOhms, of a metal rod 3.99 m long, 0.39cm diameter and composed of aluminum of resistivity 2.8 x 10-8 Ωm .
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Determine the resistance, in milliOhms, of a metal rod 3.99 m long, 0.39cm diameter and composed of aluminum of resistivity 2.8 x 10-8 Ωm .

User MadBoy
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1 Answer

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In order to solve this, we need the formula for resistance

R = ρL/A

R = (2.8 x 10-8 Ωm)(3.99 m) / π(0.39 * 10^-2)^2 = 0.00233 ohms = 2.33 milliohms

User Pat R Ellery
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