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Passage : The thermal coefficient of resistivity is given by alpha=(1)/(rho)(d rho)/(dT) where rho is resistivity at a temperature T. alpha is not constant, rather varies as alpha=(-n)/(T), where T is temperature in Kelvin and n is a constant. For carbon alpha=-0.0005K^(-1)and rho=3.5xx10^(-5)(Omega-m)"at"27^(@)C Find the value of .n. for carbon |
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Answer» 0.15 |
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