Advanced Qualification · A-004 Power supplies · A-004-001-009
What are the two major ratings that must not be exceeded for silicon-diode rectifiers used in power-supply circuits?
- A Average power; average voltage
- B Capacitive reactance; avalanche voltage
- C Peak load impedance; peak voltage
- D Peak inverse voltage; average forward current
Correct answer: D — Peak inverse voltage; average forward current. From the official ISED question bank, verified word for word.
Why
Silicon diodes in power supplies face two main limits: the highest reverse voltage they can block without breaking down, called peak inverse voltage, and the maximum average current they can safely carry in the forward direction without overheating. 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.