What is the primary function of a diode in rectification?

The primary function of a diode in rectification is to convert alternating current (AC) to direct current (DC). Diodes allow current to flow in one direction while blocking it in the opposite direction, which is essential in the rectification process. When an AC signal is applied to a diode, the diode conducts during the positive half-cycles of the AC waveform and blocks the negative half-cycles. This results in an output that pulsates in one direction, effectively transforming AC into a form of DC.

Rectification is crucial in various applications, particularly in power supplies, where your electronics require a steady DC voltage derived from the AC mains supply. The ability of the diode to ensure current only flows in one direction makes it a key component in this conversion process.