Basic Qualification · B-004 Circuit components · B-004-003-001
Lequel des composants suivants peut amplifier un faible signal en utilisant un bas voltage?
- AUn thyristor
- BUn redresseur commandé au silicium
- CUn transistor bipolaire
- DUne résistance variable
Correct answer: C — Un transistor bipolaire. Question tirée de la banque officielle d'ISDE.
Why
A Bipolar transistor acts like a valve that uses a tiny electrical signal to control a much larger flow of power, allowing it to make weak signals stronger even when powered by low voltages. 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