Faraday's law of induction/Faraday's law is a electromagnetism law predicting how a magnetic field interacts with an electric circuit to make an electromotive force (emf), a phenomenon called electromagnetic induction, the fundamental operating principle of transformers, inductors, and many electric motor types, generators and solenoids.[2][3]
The Maxwell–Faraday equation (listed as one of Maxwell's equations) depicts the fact a spatially varying (and also possibly time-varying, depending on how a magnetic field varies in time) electric field always accompanies a time-varying magnetic field, while Faraday's law states that emf (electromagnetic work done on a unit charge when it has traveled one round of a conductive loop) appears on a conductive loop when the magnetic flux through the surface enclosed by the loop varies in time.
A conductor placed in a varying magnetic field induces the electromotive force.
If the conductor circuit close, it induces the current, called induced current.