Which device is used to convert alternating current to direct current?

Which device is used to convert alternating current to direct current?

• A. Converter
• B. Inverter
• C. Rectifier
• D. Amplifier

Answer: (C)

Rectification is the process of turning alternating current into direct current by forcing current to flow in only one direction. A rectifier uses diodes (or other controlled devices) to conduct during each half-cycle in the same polarity, producing direct current. The output is pulsating DC, which can be smoothed with capacitors or filters to become steadier DC. An inverter does the opposite—converting DC to AC. An amplifier simply increases the signal’s amplitude without changing its basic form. A converter is a broad term for various power-electronics functions, but the specific device for converting AC to DC is the rectifier.

Rectification is the process of turning alternating current into direct current by forcing current to flow in only one direction. A rectifier uses diodes (or other controlled devices) to conduct during each half-cycle in the same polarity, producing direct current. The output is pulsating DC, which can be smoothed with capacitors or filters to become steadier DC. An inverter does the opposite—converting DC to AC. An amplifier simply increases the signal’s amplitude without changing its basic form. A converter is a broad term for various power-electronics functions, but the specific device for converting AC to DC is the rectifier.