Joule's law

noun Physics.

the principle that the rate of production of heat by a constant direct current is directly proportional to the resistance of the circuit and to the square of the current.
the principle that the internal energy of a given mass of an ideal gas is solely a function of its temperature.

Origin of Joule's law

First recorded in 1850–55; named after J. P. Joule

British Dictionary definitions for joule's law

Joule's law

noun

physics the principle that the heat produced by an electric current is equal to the product of the resistance of the conductor, the square of the current, and the time for which it flows
thermodynamics the principle that at constant temperature the internal energy of an ideal gas is independent of volume. Real gases change their internal energy with volume as a result of intermolecular forces

Word Origin for Joule's law

C19: named after James Prescott Joule