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A negligibly small current is passed thr...

A negligibly small current is passed through a wire of length 20 m and uniform cross-section `6.0 xx 10^(7) m^(2)`, and its resistance is measured to be 10.0 `Omega` . What is the resistivity of the material at the temperature of the experiment ?

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Resistance of a conducting wire is R = `(rho l)/(A)`
`rho = (RA)/(l)`
`= (5 xx 6 xx 10^(7))/(15)`
`rho = 2 xx 10^(-7) Omega` m
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