Technician exam question T5C05
Subelement T5, ELECTRICAL PRINCIPLES· Group T5C
T5C05
What is the unit of impedance?
- A.Volt
- B.Ampere
- C.Coulomb
- D.Ohm (correct answer)
WhyThe unit of impedance is the ohm. Impedance, like resistance, is measured in ohms, answer D. Volt (A) measures potential, ampere (B) measures current, and coulomb (C) measures charge, none of which shares impedance's unit.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.