Red Seal Electrician Practice
AC theoryQuestion 962 of 1506

How does the change of reactance with frequency in a capacitor compare with that in an inductor?

  1. Opposite: one falls and the other rises
  2. They are the same: both reactances rise as frequency increases
  3. They are the same: both reactances fall as frequency increases
  4. Neither reactance depends on the frequency of the supply
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Correct answer: Opposite: one falls and the other rises

Capacitors allow more current as frequency rises. Inductors oppose faster current changes more strongly.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 4.2: AC Capacitor Circuits

Practice ac theory

Questions last reviewed: 18 October 2026