Advanced Qualification · A-002 Advanced components and circuits · A-002-010-002
What is an OR gate?
- A A circuit that produces a logic "0" at its output if any input is logic "1"
- B A circuit that produces a logic "1" at its output if any input is logic "1"
- C A circuit that produces a logic "0" at its output if all inputs are logic "1"
- D A circuit that produces logic "1" at its output if all inputs are logic "0"
Correct answer: B — A circuit that produces a logic "1" at its output if any input is logic "1". From the official ISED question bank, verified word for word.
Why
An OR gate acts like a simple switch where the output turns on, or becomes a logic "1", as soon as at least one of its inputs is active or a logic "1". The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.