Multiple choice general knowledge

How does a capacitor react to AC?

  1. As the frequency of the applied AC increases, the reactance increases

  2. As the amplitude of the applied AC increases, the reactance increases

  3. As the frequency of the applied AC increases, the reactance decreases

  4. As the amplitude of the applied AC increases, the reactance decreases
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C Correct answer
Explanation

Capacitive reactance is inversely proportional to frequency (Xc = 1/(2πfC)). Higher frequency means the capacitor offers less opposition to current flow. The reactance depends only on frequency and capacitance, not on amplitude.

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