Basic Qualification · B-005 Basic electronics and theory · B-005-001-002
Si on veut mesurer un courant de 3000 milliampères avec un ampèremètre gradué en ampères, quelle lecture obtiendra-t-on?
- A3 ampères
- B0,003 ampère
- C0,3 ampère
- D0,03 ampère
Correct answer: A — 3 ampères. Question tirée de la banque officielle d'ISDE.
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
Basic electronics and theory is section B-005 of the Basic exam: 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.
Drill B-005 — free, no account