Advanced Qualification · A-004 Power supplies · A-004-001-002
In a half-wave power supply with a capacitor input filter and a load drawing little or no current, the peak inverse voltage (PIV) across the diode can reach _____ times the RMS voltage.
- A2.8
- B0.45
- C5.6
- D1.4
Correct answer: A — 2.8. From the official ISED question bank, verified word for word.
Why
In a half-wave supply with a capacitor filter and almost no load, the capacitor charges to the peak voltage of the AC wave and holds it there. The full explanation — and one for every question — is in Pro.
Practise this section
Power supplies is section A-004 of the Advanced exam: Power supplies: rectifiers, filtering, regulation, switching supplies and their failure modes.
Drill A-004 — free, no account