Q 12-14-087JEE MainJEE Main 2023 (24 Jan, Shift 2)Medium
The logic gate equivalent to the given circuit diagram is
Answer: (B) NAND
The two switches are in series in a branch that is parallel to the lamp. The lamp is shorted (Y = 0) only when both $A_1$ and $B_1$ are closed; in every other case current flows through the lamp and it glows (Y = 1).
$Y=\overline{A\cdot B}$: a NAND gate.
Solution by Sreeraj P, M.Sc Physics