Basic Qualification · B-003 Station assembly, practice and safety · B-003-016-006
The voltage at a battery's terminals will drop when it supplies current. What is the cause of the drop?
- A Current capacity
- B Voltage capacity
- C Internal resistance
- D Electrolyte becoming dry
Correct answer: C — Internal resistance. From the official ISED question bank, verified word for word.
Why
Every battery has a tiny amount of resistance built inside it, called internal resistance. 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.