Basic Qualification · B-003 Station assembly, practice and safety · B-003-016-002
Which of the following has a positive terminal and a negative terminal?
- A A potentiometer
- B A fuse
- C A resistor
- D A battery
Correct answer: D — A battery. From the official ISED question bank, verified word for word.
Why
A battery creates electricity by storing chemical energy and pushing electrons from a negative terminal to a positive terminal, which is why it is the only item listed with distinct poles. 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.