Basic Qualification · B-004 Circuit components · B-004-003-006
A semiconductor device is labelled as a "general purpose audio NPN device." What is it?
- AThyristor
- BBipolar transistor
- CField-effect transistor
- DTriac
Correct answer: B — Bipolar transistor. From the official ISED question bank, verified word for word.
Why
An NPN label describes a specific way of stacking materials inside a bipolar transistor, which is the standard component used to amplify audio signals. 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