Extra exam question E7D03
Subelement E7, PRACTICAL CIRCUITS· Group E7D
E7D03
What device is used as a stable voltage reference?
- A.A Zener diode (correct answer)
- B.A digital-to-analog converter
- C.An SCR
- D.An analog-to-digital converter
WhyA Zener diode is the device used as a stable voltage reference. A Zener diode, biased into its reverse breakdown region, holds a stable, well-defined voltage across itself and is the device commonly used as a stable voltage reference in regulator and other precision circuits, answer A. Digital-to-analog and analog-to-digital converters are signal conversion devices, and an SCR is a power-switching device, none of them functions as a voltage reference.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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