Question

State Joule's law of heating.

Answer 1

Joule's law of heating states that when current flows through a conductor, the amount of heat produced $\left(H\right)$ in it is directly proportional to

1. Square of current $\left(I^2\right)$ flowing through the conductor for a given resistance and time.
2. Resistance $\left(R\right)$ of the conductor for a given current and time.
3. Time $\left(t\right)$ for which current is passed through a given conductor.

The expression for the amount of heat produced is given by $H=I^{2}Rt$.