Which logic gate output is high only when both inputs are low?

The NOR gate is designed to output a high signal (logic level '1') only when both of its inputs are low (logic level '0'). In this case, if you have two inputs, say A and B, the output of the NOR gate will be high only when both A and B are at a low state.

In terms of truth table representation, the NOR gate provides the following outputs:

• When A = 0 and B = 0, output = 1 (high)

• When A = 0 and B = 1, output = 0 (low)

• When A = 1 and B = 0, output = 0 (low)

• When A = 1 and B = 1, output = 0 (low)

This behavior distinguishes the NOR gate from other types of gates. For example, the AND gate produces a high output only when all its inputs are high, and the OR gate outputs high if any of its inputs are high. The XOR gate, on the other hand, outputs high when the inputs are different but does not relate to both inputs being low. Therefore, the NOR gate uniquely fulfills the condition of being high solely when both inputs are low.