Basic Qualification · B-005 Basic electronics and theory · B-005-010-003
La réactance d'un condensateur augmente lorsque:
- Ala fréquence augmente
- Bla fréquence diminue
- Cla tension appliquée augmente
- Dla tension appliquée diminue
Correct answer: B — la fréquence diminue. Question tirée de la banque officielle d'ISDE.
Why
Capacitors resist the flow of alternating current more when the signal changes slowly, meaning their opposition, called reactance, grows as the frequency drops. 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