Write the truth table for circuit given in figure below consisting of NOR gates and identify the logic operation (OR , AND , NOT) which this circuit is performing . (Hint : A = 0 , B = 1 , then A and B inputs of second NOR gate will be 0 and hence Y = 1 . Similarly work out the values of Y for other combination of A and B . Compare with the truth table of OR , AND , NOT gates and first the correct one .)

Explanation