Basic Qualification · B-004 Circuit components · B-004-004-003
In a field-effect transistor, which electrode controls the resistance of the device's channel?
- AGate
- BDrain
- CSource
- DCollector
Correct answer: A — Gate. From the official ISED question bank, verified word for word.
Why
The Gate acts like a faucet handle for a field-effect transistor, where applying a small voltage changes how easily electricity flows through the channel between the other two ends. The full explanation — and one for every question — is in Pro.
Practise this section
Circuit components is section B-004 of the Basic exam: The parts inside the box: resistors, capacitors, inductors, diodes, transistors, tubes and what each does in a circuit.
Drill B-004 — free, no account