Advanced Qualification · A-002 Advanced components and circuits · A-002-003-008
Quel composant conduit l'électricité d'un émetteur positif à un collecteur négatif quand l'alimentation de sa base est négative?
- AUn varactor
- BUn transistor NPN
- CUn transistor PNP
- DUne triode à vide
Correct answer: C — Un transistor PNP. Question tirée de la banque officielle d'ISDE.
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