Question

Identify the logic gate given in the circuit :

• A. NAND - gate
• B. OR - gate
• C. AND gate
• D. NOR gate

Answer 1

The Correct Option is B

The given circuit has two inputs, A and B, each passing through a NOT gate, making the inputs Ā and B̄. These modified inputs are then fed into a NAND gate, which gives the output Y as follows:

1. **Output of NAND Gate:**
Y = (Ā ⋅ B̄).

2. **Apply De Morgan’s Law:**
Using De Morgan’s law:
Y = (Ā ⋅ B̄) = A + B.

Thus, the output Y behaves as an OR gate.

Answer: OR gate