Technician exam question T6D06
Subelement T6, ELECTRONIC AND ELECTRICAL COMPONENTS· Group T6D
T6D06
What component changes 120 V AC power to a lower AC voltage for other uses?
- A.Variable capacitor
- B.Transformer (correct answer)
- C.Transistor
- D.Diode
WhyA transformer changes 120 V AC power to a lower AC voltage for other uses. A transformer uses two magnetically coupled windings to step 120 V AC down to a lower AC voltage for use elsewhere in a circuit, answer B. A variable capacitor (A) and diode (D) don't change AC voltage levels, and a transistor (C) is an active semiconductor device, not a voltage step-down component.
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.
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