Advanced Qualification · A-002 Advanced components and circuits · A-002-005-002
What are the two stable operating conditions of a silicon controlled rectifier (SCR)?
- A NPN conduction and PNP conduction
- B Oscillating and quiescent
- C Conducting and non-conducting
- D Forward conducting and reverse conducting
Correct answer: C — Conducting and non-conducting. From the official ISED question bank, verified word for word.
Why
A silicon controlled rectifier, or SCR, acts like a one-way electronic switch that has only two stable states: it is either fully letting current flow or completely blocking it. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.