The output of an OR gate is LOW when 

Electrical Engineering XYZ MCQs

The output of an OR gate is LOW when:

1. All inputs are HIGH
2. All inputs are LOW
3. Any input is LOW
4. Any input is HIGH

Correct answer: 2. All inputs are LOW

Explanation:

An OR gate produces a HIGH output when at least one of its inputs is HIGH. Conversely, the output is LOW only when all of its inputs are LOW. This behavior is in line with the logical operation of an OR gate, where the output is true (HIGH) if at least one of the inputs is true (HIGH). If all inputs are false (LOW), the output is false (LOW).

So, the correct condition for the output of an OR gate to be LOW is when all inputs are LOW.