Physics - Semiconductors Question with Solution | TestHub

The Boolean expression for an OR gate is $Y=A+B$.

Evaluating each given entry:

For (i): $A=1,B=0\Rightarrow Y=1+0=1$. This is correct.

For (ii): $A=1,B=1\Rightarrow Y=1+1=1$. The given value is $0$, so this is wrong.

For (iii): $A=0,B=0\Rightarrow Y=0+0=0$. The given value is $1$, so this is wrong.

For (iv): $A=0,B=1\Rightarrow Y=0+1=1$. This is correct.

The wrong entries are (ii) and (iii).

Answer: (ii) and (iii)