Laws of electromagnetic induction first proposed by M. Faraday. The first law states that an electromotive force is induced in a conductor when the magnetic field surrounding it changes. The second law states that the magnitude of the electromotive force is proportional to the rate of change of the field. The third law states that the sense of the induced electromotive force depends on the direction of the rate of the change of the field.
Some or all content above used with permission from J. H. Wittke.