Question:
When a transistor is used as a switch, it operates in
When a transistor is used as a switch, it operates in
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For switching action, transistor is OFF in cut-off region and ON in saturation region.
Updated On: May 27, 2026
- Active region only
- Cut-off and saturation regions
- Breakdown region only
- Inverse active region only
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The Correct Option is B
Solution and Explanation
Concept:
A transistor switch has two states: OFF state and ON state.
Step 1: In cut-off region, transistor current is almost zero. So transistor acts as an open switch.
Step 2: In saturation region, transistor conducts heavily. So transistor acts as a closed switch.
Step 3: Therefore, transistor used as a switch operates between cut-off and saturation regions. Hence: \[ \boxed{\text{Cut-off and saturation regions}} \]
Step 1: In cut-off region, transistor current is almost zero. So transistor acts as an open switch.
Step 2: In saturation region, transistor conducts heavily. So transistor acts as a closed switch.
Step 3: Therefore, transistor used as a switch operates between cut-off and saturation regions. Hence: \[ \boxed{\text{Cut-off and saturation regions}} \]
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