įaraday's law of induction (or simply Faraday's law) is a law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (emf).
But when the small coil is moved in or out of the large coil ( B), the magnetic flux through the large coil changes, inducing a current which is detected by the galvanometer ( G). When the coils are stationary, no current is induced. Faraday's experiment showing induction between coils of wire: The liquid battery (right) provides a current which flows through the small coil ( A), creating a magnetic field.
