Semiconductor Electronics Materials Devices And Simple Circuits Ques 99

99. For the logic circuit shown, the truth table is:

[2020]

(a) $A \quad B \quad Y$

$\begin{matrix} \quad 0 & 0 & 0\end{matrix} $

$\begin{matrix} \quad 0 & 1 & 1\end{matrix} $

$\begin{matrix} \quad 1 & 0 & 1\end{matrix} $

$\begin{matrix}\quad 1 & 1 & 1\end{matrix} $

(b) $\begin{matrix} A & B & Y\end{matrix} $

$\begin{matrix} \quad 0 & 0 & 1\end{matrix} $

$\begin{matrix} \quad 0 & 1 & 1\end{matrix} $

$\begin{matrix} \quad 1 & 0 & 1\end{matrix} $

$\begin{matrix} \quad 1 & 1 & 0\end{matrix} $

(c) $\begin{matrix} A & B & Y\end{matrix} $

$\begin{matrix} \quad 0 & 0 & 1\end{matrix} $

$\begin{matrix} \quad 0 & 1 & 0\end{matrix} $

$\begin{matrix} \quad 1 & 0 & 0\end{matrix} $

$\begin{matrix} \quad 1 & 1 & 0\end{matrix} $

(d) $\begin{matrix} A & B & Y\end{matrix} $

$\begin{matrix} \quad 0 & 0 & 0\end{matrix} $

$\begin{matrix} \quad 0 & 1 & 0\end{matrix} $

$\begin{matrix} \quad 1 & 0 & 0\end{matrix} $

$\begin{matrix} \quad 1 & 1 & 1\end{matrix} $

Show Answer

Answer:

Correct Answer: 99.(d)

Solution:

  1. (d)

$ Y=\overline{\bar{A}+\bar{B}}=\overline{A \cdot B}=A + B \Rightarrow \text{ AND Gate } $

Truth Table is :

$ \begin{matrix} A & B & Y \ 0 & 0 & 0 \\ 0 & 1 & 0 \\ 1 & 0 & 0 \\ 1 & 1 & 1 \end{matrix} $



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