Show the Joule's law can be expressed as `Q=rhol^(2) or sigmaE^(2)` where Q is the heat generated
Channel: Doubtnut
Date: 2021-11-02

Show the Joule's law can be expressed as `Q=rhol^(2) or sigmaE^(2)` where Q is the heat generated per unit  volume of the conductor, j=current density, `rho`=respectively of the material of the conductor, `sigma`=conductivity and E= electric field step up in the conductor.