Basic Qualification · B-004 Circuit components · B-004-004-002
Which semiconductor device has a gate, a drain and a source?
- A Bipolar transistor
- B Unijunction transistor
- C Field-effect transistor
- D Point-contact transistor
Correct answer: C — Field-effect transistor. From the official ISED question bank, verified word for word.
Why
A Field-effect transistor uses an electric field to control current flow and is built with three specific terminals called the gate, drain, and source. 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.