Advanced Qualification · A-002 Advanced components and circuits · A-002-006-001
For what portion of a signal cycle does a Class A amplifier operate?
- A The entire cycle
- B Exactly 180 degrees
- C More than 180 degrees but less than degrees
- D Less than 180 degrees
Correct answer: A — The entire cycle. From the official ISED question bank, verified word for word.
Why
A Class A amplifier keeps its output transistor turned on for the entire cycle of the input signal, meaning it amplifies the full wave without ever cutting off. 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.