A transistor can be made to operate as a switch by operating it in which of the following regions?

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SSC JE EE Previous Year Paper 15 (Held On: 26 Sep 2019 Evening)
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  1. Active region
  2. active region, cut-off region
  3. Active region, saturation region
  4. Saturation region, cut-off region

Answer (Detailed Solution Below)

Option 4 : Saturation region, cut-off region
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Detailed Solution

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Mode

EB Biasing

Collector Base Biasing

Application

Cut off

Reverse

Reverse

OFF switch

Active

Forward

Reverse

Amplifier

Reverse Active

Reverse

Forward

Not much Useful

Saturation

Forward

Forward

On Switch

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