Question

In the following circuit, the output $Y$ becomes zero for the input combinations

• A. $A=1, B=0, C=0$
• B. $A=0, B=1, C=1$
• C. $A=0, B=0, C=0$
• D. $A=1, B=1, C=0$

Answer 1

Answer: (D)

The output of the circuit can be given by
$Y=\overline{(A B) \bar{C}}=\bar{A}+\bar{B}+C$
If the output is zero,
i.e. $Y=0$ then $A=1$
$B=1$ and $C=0$