Which of the following are commonly used as rectifiers in electrical circuits?

Which of the following are commonly used as rectifiers in electrical circuits?

• A. Anodes
• B. Cathodes
• C. Transistors
• D. Diodes

Answer: (D)

Rectification relies on a device that conducts current in one direction while blocking it in the opposite direction. Diodes fit this role because their PN junction allows forward conduction with a small drop and blocks reverse current. When connected to alternating current, a diode lets through only one polarity, producing pulsating DC after smoothing. For full-wave rectification, a bridge of four diodes uses both halves of the AC cycle to build a steady DC output. Anodes and cathodes are simply the two ends of a diode, not separate rectifying devices. Transistors can regulate or switch power, but they aren’t the basic rectifiers used to convert AC to DC. That makes diodes the common rectifying components.

Rectification relies on a device that conducts current in one direction while blocking it in the opposite direction. Diodes fit this role because their PN junction allows forward conduction with a small drop and blocks reverse current. When connected to alternating current, a diode lets through only one polarity, producing pulsating DC after smoothing. For full-wave rectification, a bridge of four diodes uses both halves of the AC cycle to build a steady DC output. Anodes and cathodes are simply the two ends of a diode, not separate rectifying devices. Transistors can regulate or switch power, but they aren’t the basic rectifiers used to convert AC to DC. That makes diodes the common rectifying components.