Advanced Qualification · A-004 Power supplies · A-004-004-008
In a regulated power supply, four diodes connected together in a BRIDGE act as:
- A a rectifier
- B equalization across the transformer
- C matching between the secondary of power transformer and the filter
- D a tuning network
Correct answer: A — a rectifier. From the official ISED question bank, verified word for word.
Why
Four diodes arranged in a bridge convert alternating current, which flows back and forth, into direct current that flows in only one direction, which is the exact job of a rectifier. 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.