Advanced Qualification · A-002 Advanced components and circuits · A-002-003-008
Which component conducts electricity from a positive emitter to a negative collector when its base is made negative?
- AA varactor
- BAn NPN transistor
- CA PNP transistor
- DA triode vacuum tube
Correct answer: C — A PNP transistor. From the official ISED question bank, verified word for word.
Why
A PNP transistor conducts current from its positive emitter to its negative collector when the base is made negative, because this negative voltage allows holes to flow across the junctions inside the device. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits is section A-002 of the Advanced exam: Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.
Drill A-002 — free, no account