RCDD · Question #133
Which of the following electrical devices is used to convert AC to DC?
The correct answer is B. Rectifier. A rectifier is the electrical device that converts alternating current (AC) to direct current (DC), which is essential for powering DC-based electronics from AC mains.
Question
Which of the following electrical devices is used to convert AC to DC?
Options
- AInverter
- BRectifier
- CTransformer
- DLine filter
How the community answered
(31 responses)- A3% (1)
- B84% (26)
- C3% (1)
- D10% (3)
Why each option
A rectifier is the electrical device that converts alternating current (AC) to direct current (DC), which is essential for powering DC-based electronics from AC mains.
An inverter performs the opposite conversion - it changes DC input into AC output - and is used in UPS output stages and solar power systems.
A rectifier uses diodes or thyristors to allow current flow in only one direction, converting AC voltage waveforms into a unidirectional DC output. This rectification process is the core stage in virtually all electronic power supplies, transforming wall AC power into the DC voltages required by circuits and equipment.
A transformer changes the voltage level of an AC signal but keeps the output as AC; it cannot convert AC to DC.
A line filter removes electrical noise and harmonic interference from the AC supply but does not change the nature of the current from AC to DC.
Concept tested: AC to DC conversion function of a rectifier
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