Question

The given electrical network is equivalent to

• A. OR gate
• B. NOR gate
• C. NOT gate
• D. AND gate

Answer 1

The correct option is B NOR gate

$$Y_1=\overline{A+B}$$
$$Y_2=\overline{Y_1+Y_1}=\overline{Y_1}=A+B$$
$$Y=\overline{Y_2}=\overline{A+B}$$
Thus the circuit is equivalent to NOR gate.