Q79 / 90 · JEE Main 2022 (27 Jun Shift 2) · Physics
For a transistor to act as a switch, it must be operated in
- AActive region
- Correct answerBSaturation and cut-off region
- CCutoff region only
- DSaturated region only
Solution

The saturation zone and cut-off area are known as the transistor switch’s working regions. This implies that, by switching between its “top-off” (saturation) and “absolute OFF,” the transistor is used as a switch.
Hence, the correct answer is option: 'B'.