Basic Qualification · B-004 Circuit components · B-004-001-004
Pour augmenter les signaux très faibles arrivant d'un microphone, il faut employer:
- Aun oscillateur audio
- Bun amplificateur audio
- Cun oscillateur RF
- Dun amplificateur RF
Correct answer: B — un amplificateur audio. Question tirée de la banque officielle d'ISDE.
Why
A microphone turns your voice into a very weak electrical signal that needs boosting before it can be sent out or recorded. 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