Advanced Qualification · A-002 Advanced components and circuits · A-002-006-011
Which class of amplifier operates over less than 180 degrees of the cycle?
- A Class AB
- B Class A
- C Class B
- D Class C
Correct answer: D — Class C. From the official ISED question bank, verified word for word.
Why
Class C amplifiers conduct for less than half of the input signal cycle, meaning the active device is on for under 180 degrees. 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.