PhysicsNEET 2024Logic gates

Semiconductor Electronics

A logic circuit provides the output $Y$ as per the following truth table:

A	B	Y
0	0	1
0	1	0
1	0	1
1	1	0

The expression for the output $Y$ is:

A. $A\cdot B + \bar{A}$
B. $\bar{B}$ ✓
C. $B$
D. $\bar{A}\cdot B + A$

Solution

The output is 1 exactly when $B = 0$ , regardless of $A$ — the table is that of $\bar{B}$ .

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Last revised 8 Sept 2026. Found a mistake? Tell us — corrections are the fastest thing we act on.

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