Question

The electrical resistivity of copper at 27 degree Celsius is 1.72 x 10^(-8) ohm meter.compute its thermal conductivity if the Lorentz number is 2.26 x 10 ^(-8) watts ohm per levin square​

Answer 1

Answer:

Alan Turing: father of the modern

computer.

Answer 2

The thermal conductivity is $2.14*10^-19$

Explanation:

Given :

electric resistivity of a copper = $27$

$R = 1.72 x 10^-8 ohm meter$

Lorentz number = $2.26 x 10 ^-8$ watts ohm per levin square​

The Lorentz number is a dimensionless number that relates the thermal conductivity of a metal to its temperature and its electrical conductivity. The Lorentz number equals voltage squared times specific electrical conductivity divided by the temperature difference and specific thermal conductivity.

$f= m/en^2\pi$

$\pi =m/ne^2*f$

= $9.11*10^-31/8.4*10^28*1.7*10^-8*(1.6*^-19)^2$

= $2.14*10^-19$