Rectifiers perform which function?

• A. Convert DC to AC
• B. Store energy
• C. Convert AC to DC
• D. Increase voltage

Answer: (B)

Rectifiers convert alternating current into direct current. They achieve this by using diodes to allow current to flow in only one direction, turning the bidirectional AC waveform into a unidirectional DC output. In power systems and equipment, this DC is often smoothed with capacitors or other filters to provide stable voltage for motors, control circuits, and signaling gear. Remember, the rectifier’s role is direction change, not energy storage—the storage happens in components like capacitors, batteries, or inductors that may be part of the overall circuit. If you need DC to become AC or to increase voltage, different devices are used (an inverter for DC-to-AC, and a transformer or other circuit for voltage change), which are not the rectifier’s function.