Basic Qualification · B-003 Station assembly, practice and safety · B-003-016-010
What voltage and capacity will you achieve by connecting two 12 volts, 20 ampere-hour batteries in series?
- A 24 volts, 20 ampere-hours
- B 24 volts, 40 ampere-hours
- C 12 volts, 40 ampere-hours
- D 6 volts, 80 ampere-hours
Correct answer: A — 24 volts, 20 ampere-hours. From the official ISED question bank, verified word for word.
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
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.