Question

In the circuit below, A and B represent two inputs and C represents the output. The circuit represents:

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

Hint:

When analyzing logic circuits, always identify the components first, such as NOT, AND, OR, and NAND gates, and then trace how the signals flow through the circuit to determine the final output.

Answer 1

The Correct Option is B

The circuit consists of two NOT gates, which are connected to two inputs A and B. The NOT gates invert the inputs A and B, producing the outputs \( A' \) and \( B' \) respectively. These outputs are then fed into an OR gate.
In an OR gate, the output is high (1) when at least one of the inputs is high (1). Therefore, in this circuit, the final output \( C \) will be a logical OR of the inverted inputs.
The function of the circuit is equivalent to the OR gate, as the logic operation that connects the inputs through the NOT gates and the OR gate is characteristic of an OR gate.
Thus, the circuit represents an OR gate, and the correct answer is (B).