Answer: At least one input is 1.
- A Both inputs are 0
- B At least one input is 1
- C Both inputs are 1 only
- D Neither input is 1
Correct answer: B. At least one input is 1
Explanation: OR gate: output = 1 if at least one input is 1. Output = 0 only if ALL inputs are 0.
Conductors have overlapping bands, semiconductors have a small energy gap that can be bridged by heat or doping, and insulators have a large gap that blocks conduction.
Concept context
Band theory, p-n junction, diodes, transistors, logic gates, and integrated circuits.