Basic Qualification · B-004 Circuit components · B-004-001-003
Pour augmenter le niveau d'un signal radio très faible reçu par une antenne, on utilise:
- Aun oscillateur RF
- Bun oscillateur audio
- Cun amplificateur audio
- Dun amplificateur RF
Correct answer: D — un amplificateur RF. Question tirée de la banque officielle d'ISDE.
Why
An RF amplifier boosts weak radio frequency signals right after they arrive from the antenna, making them strong enough for the rest of the radio to process. 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