Basic Qualification · B-004 Circuit components · B-004-003-010
Lorsqu'un transistor bipolaire est utilisé comme interrupteur, quelle électrode commande son état?
- APorte
- BBase
- CÉmetteur
- DCollecteur
Correct answer: B — Base. Question tirée de la banque officielle d'ISDE.
Why
In a bipolar transistor, the Base acts as the control valve; a small current entering this terminal allows a much larger current to flow between the other two terminals, effectively turning the device on or off like a switch. 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