In an AND gate, if one input is low, what will the output be?

In an AND gate, the principle of operation is such that the output is high only when all of its inputs are high. This means that if even one input is low, regardless of the state of any other inputs, the output will be low.

When one input of an AND gate is low (which represents a logical 0), this condition dominates the overall operation of the gate. Therefore, it is impossible for the output to be high since at least one input does not meet the required condition for the output to transition to high.

Consequently, the correct understanding is that the output will invariably be low when one input is low, making this the accurate answer. The other options do not align with the fundamental behavior of an AND gate under these circumstances, as they suggest scenarios (such as the output being high) that contradict the definition of the gate's logical operation.