Question #335184

What is Lorentz number?Â The thermal and electrical conductivities of Cu at 20^{o}C areÂ 390 Wm^{-1}K^{-1Â }and

5.87x10^{7}W^{-1}m^{-1}Â respectively. Calculate Lorentz number.â€‹â€‹

Expert's answer

The Lorentz number is given by

"L=\\frac{\\kappa}{\\sigma T}""L=\\rm\\frac{290\\: Wm^{-1}K^{-1}}{5.87\\times 10^{7}\\: \\Omega ^{-1}m^{-1}\\times 293\\: K}=1.69\\times 10^{-8}\\: W\\Omega K^{-2}"

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