Which of the following expressions gives the Joule's law of heating?

Correct option is C

Joule's law of heating states that the heat produced in a conductor due to the passage of electric current is directly proportional to the square of the current, the resistance of the conductor, and the time for which the current flows. Mathematically, it is expressed as:

$$H = I^2 R t$$​

Where H is the heat produced, I is the current, R is the resistance, and t is the time. This relationship shows how electrical energy is converted into heat in a conductor.