Joule’s Law is the rate of heat production by a steady current in any part of an electrical circuit that is proportional to the resistance (R) and to the square of the current (I^2), or the internal energy of an ideal gas depends only on its temperature. The electric power loss (P) = R * I^2 * t
Reference Definition by Britannica: Joule’s law, in electricity, mathematical description of the rate at which resistance in a circuit converts electric energy into heat energy. The English physicist James Prescott Joule discovered in 1840 that the amount of heat per second that develops in a wire carrying a current is proportional to the electrical resistance of the wire and the square of the current. He determined that the heat evolved per second is equivalent to the electric power absorbed, or the power loss.
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