Basic Qualification · B-005 Basic electronics and theory · B-005-001-002
If an ammeter marked in amperes is used to measure a 3000-milliampere current, what reading would it show?
- A 0.3 amperes
- B 0.03 amperes
- C 3 amperes
- D 0.003 amperes
Correct answer: C — 3 amperes. From the official ISED question bank, verified word for word.
Why
The meter shows 3 amperes because "milli" means one thousandth, so you must divide 3000 by 1000 to convert milliamperes to amperes. The full explanation — and one for every question — is in Pro.
Practise this section
The theory: Ohm's law, power, series and parallel circuits, AC and DC, frequency and wavelength, decibels, and the metric prefixes the exam leans on.