(a) (i) Write the truth tables of the logic gates marked P and Q in the given circuit.

      (ii) Write the truth table for the circuit.

 

 
 
 
 
 

Answers (1)

(a) The truth table of the given logic rates :

(i)                     P                                                                

A Y
0 1
1 0

                        Q

A B Y
0 0 1
0 1 0
1 0 0
1 1 0

(ii) The truth table for the given circuit ;

A B Y
0 0 0
0 1 0
1 0 1
1 1 0

 

(b) The NOR gate is called a universal gate because it performs all the logic operations of basic gates like.AND, OR, NOT

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