Faraday's laws are two laws of electrolysis and three of electromagnetic induction, formulated by Michael Faraday. In modern form, the electrolysis laws state that (1) the amount of chemical change during electrolysis is proportional to (1) the amount of chemical change during electrolysis is proportional to the charge passed, and (2) the amount of chemical change produced in a substance by a certain amount of electricity is proportional to the electrochemical equivalent of that substance.

Faraday's laws of induction state that (1) an electromagnetic force is induced in a conductor if the magnetic field surrounding it changes, (2) the electromagnetic force is proportional to the rate of change of the field, and (3) the direction of the induced electromagnetic force opposes the change in the external field.