What function does a rectifier serve in an electrical circuit?

A rectifier is an essential component in electrical circuits, primarily tasked with converting alternating current (AC) into direct current (DC). This function is crucial because many devices and components require a steady and unidirectional flow of current to operate correctly.

Alternating current alternates its direction, causing issues when powering devices that need constant current flow. By using a rectifier, the AC is allowed to pass only in one direction, effectively converting it to DC. This transformation is achieved through components such as diodes, which only allow current to flow in one designated direction, thus blocking the reverse flow.

Understanding the functionality of a rectifier is vital in the field of esthetics, especially when dealing with equipment that requires specific power configurations for safe and effective operation during treatments.