Basic Qualification · B-005 Basic electronics and theory · B-005-001-005
Si un émetteur portatif a une puissance de 500 milliwatts, quelle est sa puissance exprimée en watts?
- A0,05 watt
- B0,5 watt
- C5 watts
- D50 watts
Correct answer: B — 0,5 watt. Question tirée de la banque officielle d'ISDE.
Why
One watt equals one thousand milliwatts, so to change milliwatts into watts, you divide by one thousand. 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