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What is the term for the inverse of impedance?

Admittance is the inverse of impedance.

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  1. Conductance
  2. Susceptance
  3. Admittance ✔

Why: Impedance is the ratio of voltage to current. Flip that ratio over and you get admittance. Reactance, by contrast, is the opposition to AC from a capacitor or inductor.

Huh, didn't know that: Reactance is measured in ohms and is represented by the letter X.

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References

Answer: Admittance. Impedance is the ratio of voltage to current. Flip that ratio over and you get admittance. Reactance, by contrast, is the opposition to AC from a capacitor or inductor.

  1. NCVEC 2023-2027 General Class Pool and Syllabus (6th Errata, Feb 4 2026) ncvec.org/downloads/General%20Class%20Pool%20and%20Syllabus%202023-2027%20Public%20Release%20with%206th%20Errata%20Feb%204%202026.pdf
    Admittance
    Checked 2026-10-11.

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