Faraday's law of electromagnetic induction

Faraday's law of electromagnetic induction states that a changing magnetic field around a coil of wire creates an electric current in that wire. Essentially, when the magnetic environment of a conductor changes—either by moving a magnet near it, moving the coil itself, or altering the magnetic field—electricity is generated without any physical contact. This principle is fundamental to how transformers, electric generators, and many electrical devices work, converting mechanical energy into electrical energy by exploiting the relationship between changing magnetic fields and induced currents.