Question

Draw the logic symbol of a NOR gate and write its truth table.

Hint:

A NOR gate is the complement of an OR gate. It gives an output of 1 only when all inputs are 0.

Answer 1

Step 1: Logic symbol of a NOR gate.
The logic symbol for a NOR gate is:

\[ \text{NOR Gate Symbol:} \quad \text{(similar to OR gate, but with a circle at the output)} \]

Step 2: Truth table for NOR gate.
The truth table for a NOR gate is as follows:

\[ \begin{array}{|c|c|c|} \hline \text{Input A} & \text{Input B} & \text{Output (A NOR B)} \\ \hline 0 & 0 & 1 \\ 0 & 1 & 0 \\ 1 & 0 & 0 \\ 1 & 1 & 0 \\ \hline \end{array} \]

Step 3: Conclusion.
The NOR gate produces an output of 1 only when both inputs are 0.