Red Seal Electrician Practice
AC theoryQuestion 959 of 1506

A 100 µF capacitor is on a 60 Hz supply. The supply frequency is then raised. What happens to the capacitive reactance?

  1. It increases
  2. It stays the same
  3. It becomes zero at once
  4. It decreases
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Correct answer: It decreases

Capacitive reactance is inversely proportional to frequency, so a higher frequency lowers it.

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

Practice ac theory

Questions last reviewed: 18 October 2026