Which of the following is NOT a function of a full-wave rectifier?

A full-wave rectifier has several essential functions, the primary one being to convert alternating current (AC) into direct current (DC). It achieves this by allowing current to flow in one direction regardless of which half of the AC waveform is in play, effectively utilizing both halves of the waveform.

When a full-wave rectifier operates, it combines the positive and negative halves of the AC cycle into a single output that only flows in one direction. This process significantly increases the efficiency of the rectification process, as the output is smoother and has less ripple compared to half-wave rectification.

Filtering noise from the signal, however, is not a primary function of a full-wave rectifier. While some filtering might happen as a result of the rectification process (often with additional components like capacitors), the rectifier's main role is simply to convert the AC signal. Noise filtering is typically handled by separate circuits or components, such as filters or smoothing capacitors, which are added after rectification to improve the quality of the DC output. Hence, this makes filtering noise distinct from the essential functions of a full-wave rectifier itself.