MCQ
Which logic gate with inputs $A$ and $B$ performs the same operation as that performed by the following circuit?
- A$NAND$ gate
- ✓$OR$ gate
- C$NOR$ gate
- D$AND$ gate
✓
Answer
Correct option: B.
$OR$ gate
b
When either of $A$ or $B$ is $1$ i.e. closed then lampwill glow.
When either of $A$ or $B$ is $1$ i.e. closed then lampwill glow.
In this case, Truth table
$\begin{array}{|c|c|c|}\hline & {\text { Inputs }} & {\text { Output }} \\ \hline \mathrm{A} & {\mathrm{B}} & {\mathrm{Y}} \\ {0} & {0} & {0} \\ {0} & {1} & {1} \\ \hline 1 & {0} & {1} \\ {1} & {1} & {1} \\ \hline\end{array}$
This represents $OR$ gate.
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