Question

When the inputs of a two input logic gate are 0 and 0, the output is 1. When the inputs are 1 and 0 the output is 0. The logic gate is of the type

• A. AND
• B. NAND
• C. NOR
• D. OR

Hint:

NOR gate: output is HIGH (1) only when ALL inputs are LOW (0). It is equivalent to OR followed by NOT.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
NOR gate: output \(= \overline{A+B}\). Output is 1 only when both inputs are 0.
Step 2: Detailed Explanation:
\(A=0, B=0 \Rightarrow \overline{0+0} = \overline{0} = 1\)
\(A=1, B=0 \Rightarrow \overline{1+0} = \overline{1} = 0\)
This matches NOR gate.
Step 3: Final Answer:
The logic gate is NOR.