Technician exam question T5C12
Subelement T5, ELECTRICAL PRINCIPLES· Group T5C
T5C12
What is impedance?
- A.The opposition to AC current flow (correct answer)
- B.The inverse of resistance
- C.The inverse of reactance
- D.The power handling capability of a component
WhyImpedance is the opposition to AC current flow. Impedance is the total opposition an AC circuit presents to current flow, combining resistance with the reactance of any capacitors or inductors present, answer A. B and C both invert real relationships, impedance isn't the inverse of resistance or reactance, it's built from them, and D describes power-handling capacity, an unrelated rating.
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.