In rectifier circuits, the function of a diode is to

In rectifier circuits, the function of a diode is to

• A. Convert AC to DC
• B. Increase voltage
• C. Store charge
• D. Filter noise

Answer: (A)

In rectifier circuits, a diode’s job is to let current flow in only one direction, which turns alternating current into direct current. It conducts when the anode is more positive than the cathode, and it blocks current when the polarity reverses. This uneven conduction means the load receives current during each half-cycle in the same direction, producing a pulsating DC voltage. A smoothing capacitor can then reduce the ripple to give a steadier DC output. The diode doesn’t increase voltage, it simply directs current; it doesn’t store charge—that’s the role of capacitors or batteries—and it isn’t a primary component for filtering noise, which is handled by dedicated filters.

In rectifier circuits, a diode’s job is to let current flow in only one direction, which turns alternating current into direct current. It conducts when the anode is more positive than the cathode, and it blocks current when the polarity reverses. This uneven conduction means the load receives current during each half-cycle in the same direction, producing a pulsating DC voltage. A smoothing capacitor can then reduce the ripple to give a steadier DC output. The diode doesn’t increase voltage, it simply directs current; it doesn’t store charge—that’s the role of capacitors or batteries—and it isn’t a primary component for filtering noise, which is handled by dedicated filters.