JEE Main 2026 · 8 Apr · Shift 2 · Physics Q45 · Dronacharya Exams

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The output $Y$ for the given inputs $A$ and $B$ to the circuit is :

Left: waveforms. A is 0 for 0-1 s, 1 for 1-3 s, then 0. B is 1 for 0-2 s, 0 for 2-3 s, then 1. Right: A and B feed one AND gate; Ā (through a bubble) and B feed a second AND gate; both outputs go to an OR gate giving Y.

A

Option A: Y = 1 for 0-1 s, 0 for 1-3 s, then 1 after 3 s.

B

Option B: Y = 1 for 0-2 s, 0 for 2-3 s, then 1 after 3 s.

C

Option C: Y = 0 for 0-2 s, 1 for 2-3 s, then 0 after 3 s.

D

Option D: Y = 0 for 0-1 s, 1 for 1-2 s, then 0 after 2 s.

Answer and worked solution

Official answer: B

Circuit. $Y=AB+\bar AB=B$ .

Waveform. B is 1 from 0 to 2 s, 0 from 2 to 3 s, then 1 again; that is graph (B).

(B)

Topics:Logic gates

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