Technician exam question T6A02
Subelement T6, ELECTRONIC AND ELECTRICAL COMPONENTS· Group T6A
What type of component is often used as an adjustable volume control?
- A.Fixed resistor
- B.Power resistor
- C.Potentiometer (correct answer)
- D.Transformer
WhyA potentiometer is often used as an adjustable volume control. A potentiometer is a three-terminal variable resistor whose wiper taps off a portion of the applied voltage, exactly the mechanism behind an adjustable volume control, answer C. A fixed resistor (A) can't be adjusted, a power resistor (B) is just a resistor built to dissipate more heat, and a transformer (D) changes voltage by a fixed turns ratio, not a smoothly adjustable one.
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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