The following figure shows a logic gate circuit with two inputs A and… | NEET 2006 (AIPMT)

Q179NEET 2006 · AIPMTEasy

Logic Gates

The following figure shows a logic gate circuit with two inputs A and B and the output C.

The voltage waveforms of A, B and C are as shown below.

The logic circuit gate is

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Answer: (b)

First pulse: $A = 1, B = 1 \Rightarrow C = 1$ .
Second $A$ pulse: $B = 0$ there, so $C = 0$ ; when only $B = 1$ (A = 0), $C = 0$ too.
Third pulse: $A = 1, B = 1 \Rightarrow C = 1$ .
$C = 1$ only when both inputs are 1, so $C = A \cdot B$ .
So the answer is (b) AND gate.

Logic Gates question from NEET 2006 (AIPMT)