question_answer

The given electrical network is equivalent to:

A) OR gate

B)        NOR gate

C) NOT gate          

D)        AND gate

Correct Answer: B

Solution :

[b] \[{{Y}_{1}}=\overline{A+B}\] \[{{Y}_{2}}=\overline{{{Y}_{1}}+{{Y}_{1}}}=\overline{{{Y}_{1}}}=A+B\] \[Y=\overline{{{Y}_{2}}}=\overline{A+B}\,\,i.e.\]NOR gate