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

To identify the logic gate in the provided circuit, let's analyze the image.

The circuit has two inputs, A and B, connected to an OR gate. An OR gate functions as follows:

• If either input A or B is high (1), or if both are high, the output Y is high (1).
• If both inputs A and B are low (0), the output Y is low (0).

The logical operation of an OR gate is represented by the expression:

Y = A + B

Here, '+' signifies the logical OR operation.

Let's evaluate each option:

• NAND gate: Produces a low output only when both inputs are high. This contradicts the circuit's behavior.
• OR gate: Produces a high output if at least one input is high, which aligns with the circuit's behavior.
• AND gate: Produces a high output only when both inputs are high. This does not match the circuit's behavior.
• NOR gate: Produces a high output only when both inputs are low. This does not match the circuit's behavior.

Based on the preceding analysis, the circuit correctly represents an OR gate.