Extra exam question E7A01
Subelement E7, PRACTICAL CIRCUITS· Group E7A
E7A01
Which circuit is bistable?
- A.An AND gate
- B.An OR gate
- C.A flip-flop (correct answer)
- D.A bipolar amplifier
WhyA flip-flop is a bistable circuit. A flip-flop is bistable, meaning it has two stable output states and holds whichever one it's currently in until specifically triggered to switch, the basic building block of digital memory and counters, answer C. AND and OR gates are simple combinational circuits with no memory of their own, and a bipolar amplifier is an analog device, none of them is bistable in this sense.
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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