Basic Qualification · B-004 Circuit components · B-004-005-003
A feature common to triode tubes and transistors is that both:
- A can amplify signals
- B have electrons drifting through a vacuum
- C dissipate heat when not conducting
- D use heat to cause electron movement
Correct answer: A — can amplify signals. From the official ISED question bank, verified word for word.
Why
Both triode tubes and transistors can amplify signals because they use a small input to control a much larger flow of electricity, making weak radio waves stronger. 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.