Advanced Qualification · A-004 Power supplies · A-004-004-010
In a regulated power supply, the output of the electrolytic filter capacitor is connected to the:
- A solid-state by-pass circuit
- B matching circuit for the load
- C voltage regulator
- D pi filter
Correct answer: C — voltage regulator. From the official ISED question bank, verified word for word.
Why
The electrolytic filter capacitor smooths out the rough pulses from the rectifier, but the voltage still wavers with changes in load or input power. The full explanation — and one for every question — is in Pro.
Practise this section
Power supplies: rectifiers, filtering, regulation, switching supplies and their failure modes.