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A negligibly small current is passed thr...

A negligibly small current is passed through a wire of length 15 m and uniform cross-section `6 xx 10^(-7)" m"^(2)` and its resistance is measured to be `5 Omega`. What is the resistivity of the material at the temperature of the experiment?

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`R = rho (l)/( A) rArr rho = ( RA)/( l) = (5 xx 6 xx 10^(-7) )/( 15) = 2 xx 10^(7) Omega - m`
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