Question

To get output $1$ for the following circuit, the correct choice for the input is.

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

Answer 1

The correct option is D A$=1$, B$=0$, C$=1$

From left side the first gate is OR gate and next one is AND gate. So the out put of OR gate is $A+B$ and the output of AND gate $Y=(A+B).C$

We know that for AND gate the put will be 1 if both inputs are 1. So, $A+B=1$and $C=1$

In logic gate , $1+0=1$ so $A=1,B=0,C=1$ will be the correct choice for output 1.