Advanced Qualification · A-004 Power supplies · A-004-001-008
Full-wave voltage doublers:
- A create four times the output voltage of half-wave doublers
- B use less power than half-wave doublers
- C are used only in high-frequency power supplies
- D use both halves of an AC wave
Correct answer: D — use both halves of an AC wave. From the official ISED question bank, verified word for word.
Why
A full-wave voltage doubler works by capturing energy from both the positive and negative parts of an alternating current cycle, effectively doubling the output voltage compared to a single half-cycle. 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.