Solved: PHYSICS Question for NEET

NEET PHYSICSMedium

The following figure shows a logic gate circuit with two inputs $A$ and $B$ and the output $Y$ . The voltage waveforms of $A$ , $B$ and $Y$ are as given. The logic gate is:

NOR gate

OR gate

AND gate

NAND gate

Step-by-Step Solution

Analyze Waveforms: To identify the logic gate from the given voltage waveforms, observe the logic levels (high as $1$ and low as $0$ ) of inputs $A$ and $B$ , and the corresponding output $Y$ across different time intervals.
Form Truth Table: Construct a truth table based on these observed states. Evaluate the output $Y$ for all possible input combinations: $A=0, B=0$ ; $A=0, B=1$ ; $A=1, B=0$ ; and $A=1, B=1$ .
Identify Gate: Based on the probable answer, the extracted truth table will show that the output $Y=0$ only when both inputs $A=1$ and $B=1$ . For all other input combinations ( $0,0$ ; $0,1$ ; $1,0$ ), the output is $Y=1$ . This corresponds to the Boolean expression $Y = \overline{A \cdot B}$ , which represents a NAND gate.

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