Basic Qualification · B-004 Circuit components · B-004-005-006
Dans une triode à vide, quelle électrode commande le courant?
- ALa cathode
- BLa plaque
- CLa grille
- DL'émetteur
Correct answer: C — La grille. Question tirée de la banque officielle d'ISDE.
Why
The Grid is the control element in a vacuum triode because it sits between the cathode and the plate, acting like a valve that regulates how many electrons flow through the tube to create an amplified signal. 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