Question

The following circut represents(a) OR gate(b) XOR gate(c) AND gate(d) NAND gate

Answer 1

Its opt is B

Substitute all the possible values in place of A and B and form the truth table and then compare the truth table with the truth table of the options given

The truth table for the above circuit is

00-0

01-1

10-1

11-0

Answer 2

QUESTION :-

The following circut represents

(a) OR gate

(b) XOR gate

(c) AND gate

(d) NAND gate

SOLUTION :-

(b) XOR gate

EXPLANATION :-

Substitute all the possible values in place of A and B and form the truth table and then compare the truth table with the truth table of the options given.

Output of upper AND gate = $\sf{\dfrac{}{A}}$B

Output of lower AND gate = A$\sf{\dfrac{}{B} }$

Thus, output of OR gate =  $\sf{\dfrac{}{A}}$B + A$\sf{\dfrac{}{B} }$

→ This is Boolean expression for XOR gate.

The truth table for the above circuit is :-

00-0

01-1

10-1

11-0