For the following circuit and given inputs A and B, choose the...

For the following circuit and given inputs $A$ and $B,$ choose the correct option for output $‘ Y ’$

For the following circuit and given inputs A and B, choose the correct option for output ‘ Y ’

Options

Correct answer

A. A heavy string is fastened at one end to a movable support and at the other end to a light thread, as shown in the

Step-by-step solution

The signal $A$ is given to a NOR gate and $B$ is given to an OR gate. The output of these two signals is given to a NAND gate. Using the laws of Boolean algebra,
$Y = \overset{¯}{A \cdot B} = A + \overset{¯}{B}$ .
Analysing from the input graphs, one can see,
${t}_{1} - {t}_{2}: A = 0, \overset{¯}{B} = 0, Y = 0{t}_{2} - {t}_{3}: A = 1, \overset{¯}{B} = 0, Y = 1{t}_{3} - {t}_{4}: A = 0, \overset{¯}{B} = 1, Y = 1{t}_{4} - {t}_{5}: A = 1, \overset{¯}{B} = 0, Y = 1{t}_{5} - {t}_{6}: A = 1, \overset{¯}{B} = 1, Y = 1$

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