AdvancedA-002-010-002
What is an OR gate?
D
Answer
Circuit design and power supplies
Type
A
A circuit that produces a logic "0" at its output if any input is logic "1"
B
A circuit that produces a logic "0" at its output if all inputs are logic "1"
C
A circuit that produces logic "1" at its output if all inputs are logic "0"
D
A circuit that produces a logic "1" at its output if any input is logic "1"
Answer Notes
An OR gate is a fundamental digital logic gate that performs logical disjunction. It outputs a logic "1" (TRUE) if at least one of its inputs is a logic "1".
It only outputs a logic "0" (FALSE) if every single input is logic "0". Think of it like a set of parallel switches completing a circuit; if switch A or switch B (or both) is closed, the current flows.
Distractors here often confuse OR with AND (requires all inputs to be "1") or NOR (inverts the OR output). The key is the word "any" — if any input is high, the output is high.
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What is a NAND gate?
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What is a NOR gate?