Red Seal Electrician Practice
AC theoryQuestion 993 of 1506

What is susceptance?

  1. The reciprocal of reactance
  2. The reciprocal of resistance
  3. The same as impedance
  4. The product of reactance and frequency
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Correct answer: The reciprocal of reactance

Susceptance (B) is 1/X, the complement of reactance, in the same way that conductance complements resistance.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 5.5: Susceptance and Admittance

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Questions last reviewed: 18 October 2026