Basic Qualification · B-003 Station assembly, practice and safety · B-003-016-009
What voltage and capacity will you achieve by connecting two 12 volts, 20 ampere-hour batteries in parallel?
- A24 volts, 20 ampere-hours
- B24 volts, 40 ampere-hours
- C12 volts, 40 ampere-hours
- D6 volts, 80 ampere-hours
Correct answer: C — 12 volts, 40 ampere-hours. From the official ISED question bank, verified word for word.
Why
Connecting two batteries side by side in parallel keeps the voltage the same as a single unit, so you still have 12 volts, but it doubles the total energy storage, giving you 40 ampere-hours of capacity. 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