Technician exam question T6B03
Subelement T6, ELECTRONIC AND ELECTRICAL COMPONENTS· Group T6B
T6B03
Which of these components can be used as an electronic switch?
- A.Varistor
- B.Potentiometer
- C.Transistor (correct answer)
- D.Thermistor
WhyA transistor can be used as an electronic switch. A transistor can be driven fully on or fully off by its control terminal, letting it act as an electronic switch, answer C. A varistor (A) and thermistor (D) are components whose resistance changes with voltage or temperature respectively, not switching elements, and a potentiometer (B) is a manually adjustable resistor, not a switch.
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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