When the output of an OR gate is applied as input to a NOT gate, then the combination acts as a

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Professor PC Thomas Classes · Answer

(b) : For OR gate, $Y=A+B$ NOT gate is applied to $Y$, \ $ 	herefore \quad \bar{Y}=\overline{A+B} $ \  which is NOR gate. \ So, when output of OR gate is applied as input to a NOT gate, then the combination acts as a NOR gate.