Basic Qualification · B-004 Circuit components · B-004-001-010
What term describes the ratio of output power to DC input power of an amplifier?
- A Loss factor
- B Efficiency
- C Current gain
- D Dynamic range
Correct answer: B — Efficiency. From the official ISED question bank, verified word for word.
Why
Efficiency measures how well an amplifier turns DC power from your supply into useful radio frequency output, with the rest lost as heat. The full explanation — and one for every question — is in Pro.
Practise this section
The parts inside the box: resistors, capacitors, inductors, diodes, transistors, tubes and what each does in a circuit.