Answer :

Final answer:

Faraday's law explains how a changing magnetic field causes an electric current to flow in a closed circuit, enabling the operation of various devices.


Explanation:

The generation of an electric current in a closed circuit by a changing magnetic field is known as Faraday's law of electromagnetic induction. This phenomenon occurs when a changing magnetic field induces an electromotive force (emf) in a closed circuit, resulting in the flow of current. Faraday's law is fundamental in the operation of various technologies like electric generators, transformers, and more.


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