Alternator - GCSE Physics Definition

An alternator is a device used in various applications, notably in vehicles, to convert mechanical energy into electrical energy in the form of alternating current (AC).

It operates on the principle of electromagnetic induction, where a rotating magnet or a coil of wire is used to create a changing magnetic field, inducing a flow of current in a surrounding coil. This process provides electricity to power the electrical systems of a car, such as the lights and radio, while also recharging the battery.

Understanding alternators is crucial for GCSE Physics students as it demonstrates practical applications of concepts like electromagnetism and energy conversion.