Basic Qualification · B-003 Station assembly, practice and safety · B-003-016-010
Quelle tension et quelle capacité obtiendrezvous en connectant deux batteries de 12 volts, 20 ampèreheures en série?
- A12 volts, 40 ampèreheures
- B6 volts, 80 ampèreheures
- C24 volts, 20 ampèreheures
- D24 volts, 40 ampèreheures
Correct answer: C — 24 volts, 20 ampèreheures. Question tirée de la banque officielle d'ISDE.
Why
Connecting batteries in series adds their voltages together while keeping the capacity the same, so two 12-volt units become 24 volts, but the 20 ampere-hour rating does not increase. The full explanation — and one for every question — is in Pro.
Practise this section
Station assembly, practice and safety is section B-003 of the Basic exam: 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