Faraday's law of induction

Rare card · No. 64897

In electromagnetism, Faraday's law of induction describes how a changing magnetic field can induce an electric current in a circuit. This phenomenon, known as electromagnetic induction, is the fundamental operating principle of transformers, inductors, and many types of electric motors, generators and solenoids. In the literature, however, Faraday's law is used to refer to two closely related but technically distinct statements, either of which can be used to explain the phenomenon of induced current described above. One is the Maxwell–Faraday equation, one of Maxwell's equations, which states that a time-varying magnetic field is always accompanied by a circulating electric field. This law applies to the fields themselves and does not require the presence of a physical circuit. The other is Faraday's flux rule, or the Faraday–Lenz law, which relates the electromotive force (emf) around a closed conducting loop to the time rate of change of magnetic flux through the loop. This rule can...

Read on Wikipedia · Image Federal Aviation Administration, Public domain