Basic Qualification · B-004 Circuit components · B-004-003-007
What are the two basic types of bipolar transistors?
- A NPN and PNP
- B Diode and triode
- C Varicap and varistor
- D P channel and N channel
Correct answer: A — NPN and PNP. From the official ISED question bank, verified word for word.
Why
Bipolar transistors come in two basic arrangements based on how their semiconductor layers are stacked: either a negative layer sandwiched between two positive layers (NPN) or a positive layer between two negative ones (PNP). 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.