Basic Qualification · B-004 Circuit components · B-004-004-007
What is the control electrode in a field-effect transistor?
- A Base
- B Gate
- C Source
- D Drain
Correct answer: B — Gate. From the official ISED question bank, verified word for word.
Why
In a field-effect transistor, the Gate acts as the control electrode because it regulates the flow of electricity through the device without drawing significant current itself, much like a valve controlling water in a pipe. 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.