Joule's first law expresses the relationship between heat generated in a conductor and current flow, resistance, and time.
[1] The magnetostriction effect describes a property of ferromagnetic materials which causes them to change their shape when subjected to a magnetic field.
[2] In 1845, Joule studied the free expansion of a gas into a larger volume.
[3] The cooling of a gas by allowing it to expand freely is occasionally referred to as the Joule effect.
[4] If an elastic band is first stretched and then subjected to heating, it will shrink rather than expand.