Diodes are used in electrical power supply circuits primarily as ______.

Diodes are used in electrical power supply circuits primarily as ______.

• A. Rectifiers
• B. Conductors
• C. Regulators
• D. Sensors

Answer: (D)

Rectification: turning AC into DC. A diode conducts current in only one direction, so when AC is fed into a rectifier circuit (a single diode or a bridge of four diodes), current is steered so it flows in the same direction through the load during both halves of the cycle. That produces pulsating DC, which is then smoothed by a filter to give a steady DC voltage for the power supply. While diodes can be used for regulation (with special types like Zener diodes) or sensing in other contexts, their primary role in a basic power supply is converting alternating current to direct current.

Rectification: turning AC into DC. A diode conducts current in only one direction, so when AC is fed into a rectifier circuit (a single diode or a bridge of four diodes), current is steered so it flows in the same direction through the load during both halves of the cycle. That produces pulsating DC, which is then smoothed by a filter to give a steady DC voltage for the power supply. While diodes can be used for regulation (with special types like Zener diodes) or sensing in other contexts, their primary role in a basic power supply is converting alternating current to direct current.