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  • A system of four gates is set up as shown . The ' truth table ' corresponding to this system is :   <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAU0AAACf

A system of four gates is set up as shown . The ' truth table ' corresponding to this system is :

 

Option: 1


Option: 2


Option: 3


Option: 4


Answers (1)

best_answer

 

 

 

 

 

 

 

In the given system all four gates are NOR gate.

\begin{array}{|c|c|c|c|c|c|} \hline \mathrm{A} & \mathrm{B} & \left(\mathrm{y}^{\prime}=\overline{\mathrm{A}+\mathrm{B}}\right) & \mathrm{y}^{\prime \prime}=(\overline{\mathrm{A}+\mathrm{y}^{\prime}}) & \mathrm{y}^{\prime \prime \prime}=(\overline{\mathrm{B}+\mathrm{y}^{\prime}}) & \mathrm{y}=\overline{\mathrm{y}^{\prime \prime}+\mathrm{y}^{\prime \prime \prime}} \\ \hline 0 & 0 & 1 & 0 & 0 & 1 \\ \hline 0 & 1 & 0 & 1 & 0 & 0 \\ \hline 1 & 0 & 0 & 0 & 1 & 0 \\ \hline 1 & 1 & 0 & 0 & 0 & 1 \\ \hline \end{array}

i.e 

\begin{array}{|c|c|c|} \hline \mathrm{A} & \mathrm{B} & \mathrm{y} \\ \hline 0 & 0 & 1 \\ \hline 0 & 1 & 0 \\ \hline 1 & 0 & 0 \\ \hline 1 & 1 & 1 \\ \hline \end{array}

Correct option is A

Posted by

Kuldeep Maurya

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