question_answer

The logic behind NOR gate is that which gives:

A)  high output when both inputs are high

B)  low output when both inputs are low

C)  high output when both inputs are low

D)  none of the above

Correct Answer: C

Solution :

Key Idea: NOR gate is an OR gate followed by a NOT gate. The NOR gate can be said to be a universal gate since, its repititive combinations can be used to accomplish any of the basic operations and can thus, produce an inverter, an OR gate, or an AND gate. Its output is high only when neither A nor B is high. That is, it is normally high but any kind of non-zero input will take it low. OR gate followed by a NOT gate is shown i.e., a NOR gate.