This document discusses electromagnetic induction. It defines electromagnetic induction as the generation of an electric current by passing a metal wire through a magnetic field or the production of an electromotive force across an electrical conductor in a changing magnetic field. It covers the history of electromagnetic induction including experiments by Oersted and Faraday. It also describes Faraday's law, Lenz's law, self-induction, mutual induction, and applications such as transformers, generators, and induction motors.