Solved: PHYSICS Question for NEET

NEET PHYSICSMedium

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

OR gate

NOR gate

AND gate

NAND gate

Step-by-Step Solution

Analyze Waveforms: To identify the logic gate from the given voltage waveforms, one must observe the logic levels (high as $1$ and low as $0$ ) of inputs $A$ and $B$ , and the corresponding output $C$ across different time intervals.
Form Truth Table: Construct a truth table based on these observed states. You evaluate the output $C$ 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 $C=1$ whenever input $A=1$ or input $B=1$ (or both). The output is $0$ only when both $A=0$ and $B=0$ . This corresponds to the Boolean expression $C = A + B$ , which represents an OR gate.

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