Basic Qualification · B-005 Basic electronics and theory · B-005-010-011
In general, the reactance of inductors increases with:
- Adecreasing applied voltage
- Bincreasing applied voltage
- Cincreasing AC frequency
- Ddecreasing AC frequency
Correct answer: C — increasing AC frequency. From the official ISED question bank, verified word for word.
Why
Inductors resist changes in current, and when the AC frequency rises, the current changes direction more rapidly, forcing the inductor to push back harder; this opposition is called reactance, so it grows as the frequency increases. 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