A rectifier is an electrical device that converts alternating current (AC) into direct current (DC). This process is essential for powering electronic devices that require a steady voltage, as most household electricity is supplied in AC form. Rectifiers are commonly found in power supplies, chargers, and various electronic circuits. There are different types of rectifiers, including half-wave and full-wave rectifiers. Half-wave rectifiers allow only one half of the AC waveform to pass through, while full-wave rectifiers utilize both halves, providing a smoother DC output. These devices often use components like diodes to control the flow of electricity.