Previous Year Question
When the input to an inverter is LOW (0), the output is
Correct answer: C
Explanation
An inverter implements logical NOT. Therefore a LOW input is logic 0 and its complement at the output is logic 1, i.e. HIGH. Hence option C is correct.
Formula
Y=Ā; A=0 → Y=1
Step-by-step solution
Correct Answer
C — HIGH or 1
Concept and Reasoning
An inverter implements logical NOT. Therefore a LOW input is logic 0 and its complement at the output is logic 1, i.e. HIGH. Hence option C is correct.
Calculation / Key Relation
Y=Ā
A=0 → Y=1
Exam Takeaway
NOT simply reverses the logic state: 0↔1.
Common Mistake
Keep HIGH paired with logic 1 and LOW with logic 0.
Common mistake
Keep HIGH paired with logic 1 and LOW with logic 0.
Exam tip
NOT simply reverses the logic state: 0↔1.
Quick method
NOT simply reverses the logic state: 0↔1.