Basic Qualification · B-005 Basic electronics and theory · B-005-010-006
Quel changement de paramètre entraîne une augmentation de la réactance d'une bobine dans un circuit?
- AUne diminution de la fréquence
- BUne augmentation du courant
- CUne augmentation de la tension
- DUne augmentation de la fréquence
Correct answer: D — Une augmentation de la fréquence. Question tirée de la banque officielle d'ISDE.
Why
An inductor resists changes in current, and when the frequency of the signal rises, the current changes direction faster, making the inductor push back harder. 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