Basic Qualification · B-005 Basic electronics and theory · B-005-010-001
How does an inductor react to AC?
- A As the frequency of the applied AC increases, the reactance decreases
- B As the frequency of the applied AC increases, the reactance increases
- C As the amplitude of the applied AC increases, the reactance decreases
- D As the amplitude of the applied AC increases, the reactance increases
Correct answer: B — As the frequency of the applied AC increases, the reactance increases. From the official ISED question bank, verified word for word.
Why
An inductor resists changes in current, and alternating current changes direction constantly. The full explanation — and one for every question — is in Pro.
Practise this section
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.