General exam question G5A09
Subelement G5, ELECTRICAL PRINCIPLES· Group G5A
G5A09
What unit is used to measure reactance?
- A.Farad
- B.Ohm (correct answer)
- C.Ampere
- D.Siemens
WhyReactance is measured in ohms. Reactance behaves like resistance in how it opposes current flow, so it's measured in the same unit, the ohm, answer B. The farad measures capacitance, the ampere measures current, and the siemens measures conductance/admittance, none of which is the unit for reactance itself.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.
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