Test Index

JAMB Computer Studies 2022 Paper

Question : 141

Total: 159

When does the output of a NOR gate =0?

Solution:

Concept:

A NOR gate gives an output of

1

only when all inputs are

0

Explanation:

The NOR gate is the opposite of an OR gate followed by a NOT gate.

Its output is expressed as:

Y = \overline{A+B}

The output

Y = 0

whenever the OR operation

A+B = 1

This happens when at least one input is

1

So, if any input is

1

, the output becomes

0

Answer:

C. whenever 1 is present at input

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