Basic Qualification · B-004 Circuit components · B-004-005-001
What is one reason a triode vacuum tube might be used instead of a transistor in a circuit?
- A It uses less current
- B It is much smaller
- C It uses lower voltages
- D It may be able to handle higher power
Correct answer: D — It may be able to handle higher power. From the official ISED question bank, verified word for word.
Why
Triode vacuum tubes can withstand much higher voltages and dissipate more heat than small transistors, making them suitable for powerful radio transmitters where solid-state devices might burn out. 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.