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Question 214

How does an inductor react to AC?

  1. As the frequency of the applied AC increases, the reactance decreases
  2. As the amplitude of the applied AC increases, the reactance increases
  3. As the amplitude of the applied AC increases, the reactance decreases
  4. As the frequency of the applied AC increases, the reactance increasesCorrect answer

Explanation

Inductive reactance is directly proportional to frequency, so raising the frequency raises the reactance. Signal amplitude does not appear in the formula at all, so the amplitude choices are wrong.

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Question 214: How does an inductor react to AC? · FCC General Class (Element 3) · Questena