The Fig shown input waveforms A and B to a logic gate. Draw the output waveform for an OR gate. Write the truth table for this logic gate and draw its logic symbol.

Explanation

The Boolean expression for OR gate is `y=A+B`. It means, the output of an OR gate will be maximum if one or more inputs will be maximum.
Thus the output waveform will be as showing in Fig.by curve y.
The truth table of OR gates is shown below:
`|{:(,A,B,y=A+B,),("For" t_(1)"to"t_(2),0,0,0,),("For" t_(2)"to" t_(3),1,0,1,),("For" t_(3)"to"t_(4),1,1,1,),("For" t_(4) "to" t_(5),0,1,1,),("For"t_(5) "to"t_(6),0,0,0,),("For" t_(6)"to"t_(7),1,0,0,),("For" gtt_(7),1,0,1,):}|`