Basic Qualification · B-005 Basic electronics and theory · B-005-009-010
Si vous branchez deux condensateurs de 20 microfarads en série, quelle est la capacité de la combinaison?
- A80 microfarads
- B5 microfarads
- C10 microfarads
- D40 microfarads
Correct answer: C — 10 microfarads. Question tirée de la banque officielle d'ISDE.
Why
When you connect two identical capacitors in series, the total ability to store charge drops to half of one unit, so two 20-microfarad capacitors become a single 10-microfarad combination. 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