Basic Qualification · B-003 Station assembly, practice and safety · B-003-004-002

In a basic CW transmitter, what type of electricity directly powers each stage?

1. A Audio frequency current
2. B Alternating current
3. C Direct current
4. D Radio frequency current

Correct answer: C — Direct current. From the official ISED question bank, verified word for word.

Why

Each stage inside a basic CW transmitter needs steady, one-way power to work correctly, which is exactly what Direct current provides. The full explanation — and one for every question — is in Pro.

Practise this section

Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.

Drill B-003 — free, no account · All B-003 questions