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Q. A logic gate whose output will be in logic 0 state only when all inputs are in logic 1 state is called

COMEDKCOMEDK 2010Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

For $AND$ gate,$ Y = A.B = 1.1 = 1$
For $OR$ gate, $Y = A + B = 1 + 1 = 1$
For $NOR$ gate, $Y = \overline{ A + B} = \overline{1 + 1} =\overline{1} = 0$
Also $Y = \overline{1 + 0} = \overline{1} = 0$
For $NAND$ gate, $Y= \overline{A·B } =\overline{1 .1} = \overline{1} =0$