In which condition does an OR gate output a HIGH signal?

An OR gate outputs a HIGH signal when at least one of its inputs is HIGH. This means that if any input to the OR gate is energized or activated, the output will reflect that by turning HIGH. This characteristic makes OR gates particularly useful in digital circuits for creating conditions where multiple signals can control an output, providing flexibility in signal interpretation.

In contrast, when all inputs are LOW or when there are specific conditions where inputs are HIGH, the output will not yield a HIGH signal. The nature of the OR gate is essentially to detect any positive signal, resulting in a HIGH output as long as there's at least one active signal. This fundamental property is crucial for understanding how logical operations are implemented in digital electronics.