JEE Main 2026 · 6 Apr · Shift 2 · Physics Q43 · Dronacharya Exams

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Refer to the logic circuit given below. For two inputs ( $A=1$ , $B=1$ ) and ( $A=0$ , $B=1$ ), output (Y) will be ________.

A passes through a NOT gate. The NOT output and B feed an OR gate; the NOT output and B also feed an AND gate. The OR and AND outputs feed a NOR gate whose output is Y.

A

1, 0 respectively

B

0, 1 respectively

C

0, 0 respectively

D

1, 1 respectively

Answer and worked solution

Official answer: C

Circuit. $Y=\overline{(\bar A+B)+\bar AB}=\overline{\bar A+B}$ .

$A=1,B=1$ : $\bar A+B=1$ , so $Y=0$ .
$A=0,B=1$ : $\bar A+B=1$ , so $Y=0$ .

(C)

Topics:Logic gates

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