Advanced Qualification · A-002 Advanced components and circuits · A-002-010-004
What is a NOT gate (also known as an INVERTER)?
- AA circuit that allows data transmission only when its input is high
- BA circuit that produces a logic "1" at its output when the input is logic "1"
- CA circuit that produces a logic "0" at its output when the input is logic "1"
- DA circuit that does not allow data transmission when its input is high
Correct answer: C — A circuit that produces a logic "0" at its output when the input is logic "1". From the official ISED question bank, verified word for word.
Why
A NOT gate, or inverter, simply flips the signal it receives: if you feed it a logic "1" (high voltage), it immediately outputs a logic "0" (low voltage), and vice versa. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits is section A-002 of the Advanced exam: Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.
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