Advanced Qualification · A-004 Power supplies · A-004-001-003
In a full-wave centre-tap power supply, regardless of load conditions, the peak inverse voltage (PIV) will be _____ times the RMS voltage:
- A0.636
- B0.707
- C1.4
- D2.8
Correct answer: D — 2.8. From the official ISED question bank, verified word for word.
Why
In a full-wave centre-tap supply, each diode must block the entire voltage from the other half of the transformer winding plus the output voltage, which totals roughly twice the peak voltage of one half. 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