Electromagnetic induction is the process where an electromotive force (EMF) or voltage is induced in a conductor when it is exposed to a changing magnetic field. This phenomenon was first discovered by Michael Faraday and forms the basis of electric generators, transformers, and many electrical devices. Key points about electromagnetic induction: Magnetic Field Variation: When a conductor, usually a coil of wire, experiences a change in the magnetic field strength or when the conductor moves within a magnetic field, an induced EMF is created. Applications: Electromagnetic induction is the underlying principle behind generators that convert mechanical energy into electrical energy, as well as transformers used to change voltage levels in electrical circuits. This phenomenon is crucial in understanding how electricity can be generated by moving a conductor within a magnetic field or by changing the magnetic field around a conductor, playing a pivotal role in electricity generation and transmission.