Question

The circuit given represents which of the logic operations ?

• A. OR
• B. NOR
• C. NOT
• D. AND

Answer 1

The Correct Option is B

Correct Answer: B (NOR)

Explanation: The circuit represents a NOR gate because:

• Structure: A NOR gate is equivalent to an OR gate followed by a NOT gate (inverter).
• Behavior: The output is HIGH (1) only when both inputs are LOW (0), matching the NOR truth table.

Why other options are incorrect:

• A (OR): OR gates lack the final inversion step.
• B (AND): AND gates require both inputs to be HIGH for a HIGH output.
• C (NOT): NOT gates have only one input, not two.

Key Insight: The inversion (bubble) at the output signifies the NOT operation combined with OR, defining NOR logic.