What is electromagnetic induction?

Electromagnetic induction refers to the process in which a changing magnetic field induces an electric current in a conductor. This phenomenon is foundational in many electrical applications, including generators and transformers. When a magnetic field around a conductor changes — whether by moving the conductor through a stationary magnetic field or varying the magnetic field strength — it causes electrons in the conductor to move, thereby generating an electric current.

This principle was first described by Michael Faraday and is summarized by Faraday's law of induction, which states that the induced electromotive force (or voltage) in a closed circuit is directly proportional to the rate of change of the magnetic field passing through the circuit.

This understanding allows for the design and implementation of various technologies that depend on converting mechanical energy into electrical energy and vice versa. Essentially, it’s a crucial aspect of how many electrical devices function and plays a significant role in modern electrical engineering.