Basic Qualification · B-004 Circuit components · B-004-003-009
Which electrode of the bipolar transistor controls the output current?
- A Source
- B Base
- C Emitter
- D Collector
Correct answer: B — Base. From the official ISED question bank, verified word for word.
Why
In a bipolar transistor, the Base acts like a small valve that controls the much larger flow of current between the other two parts. 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.