Multiple choice general knowledge

Which of the following causes opposition to the flow of alternating current in an inductor?

  1. Admittance

  2. Conductance

  3. Reactance

  4. Reluctance
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C Correct answer
Explanation

Reactance is the opposition to AC flow specifically caused by inductors (inductive reactance) or capacitors (capacitive reactance). In an inductor, the back EMF generated by the changing magnetic field opposes the change in current, creating reactance. Inductive reactance increases with frequency. Admittance is the inverse of impedance, conductance is the inverse of resistance, and reluctance relates to magnetic circuits.

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