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A negligibly small current is passed through a wire of length 15 m and uniform cross-section6.0 xx 10^(-7)m^2 , and its resistance is measured to be 5.0 Omega . What is the resistivity of the material atthe temperature of the experiment ? |
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Answer» Solution :Here L = 15 , A ` = 6.0 xx 10^(-7) m^2 and R = 5.0 Omega` `THEREFORE RHO = (RA)/(l) = (5.0 xx 6.0 xx 10^(-7) )/(15) = 2 xx 10^(-7) Omega m` |
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