Basic Qualification · B-004 Circuit components · B-004-005-002
Dans une triode à vide, quelles deux électrodes conduisent le courant de sortie?
- AL'émetteur et le collecteur
- BLa source et le drain
- CLa cathode et la plaque
- DLa cathode et la grille
Correct answer: C — La cathode et la plaque. Question tirée de la banque officielle d'ISDE.
Why
In a triode vacuum tube, the cathode heats up to release electrons, which then travel across the empty space to land on the positively charged plate, creating the main output current. 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