00:01
In this question we have to draw the truth table and find out the boolean expression on the basis of the given symbols.
00:09
The first part is 2 input and gate, 2 and gate and gate.
00:20
We drawn as a and b are the two inputs and after that we have an and gate.
00:27
Y is equal to a dot b and b is the output.
00:34
Find the truth table a, b, y.
00:38
If a equal to 0, b equal to 0, inputs are 0 so it is 0.
00:44
If a input is 1 and b input is 0, since both are not 1, it will again be 0.
00:53
Similarly, if b is 1, it will be 0.
00:56
Similarly, if a and b both are equal to 1, the output will be equal to 1.
01:03
This is the truth table for a 2 input and gate and boolean expression can be written as boolean y is equal to a and b.
01:18
Now coming to the second part, we have a not gate.
01:28
The function of not gate is basically reverse the input value to the output value.
01:36
This is a not gate where the input is a and the output is y is equal to a bar or a complement.
01:47
Hence truth table can be drawn as, truth table, if the value of a is equal to 0, that is input is equal to 0, the output y will be equal to 1 and if the input is equal to 1, the output will be equal to 0 and this is the truth table for a not gate and its boolean expression can be given by y is equal to a bar.
02:21
This is its boolean expression.
02:23
Coming to the third part, that is the c part, we have to draw a 3 input or gate and this can be drawn as, we have 3 inputs a, b and c.
02:40
A, b, c and connected to them is an or gate drawn something like this and it has an output y...