Transistor when working in the saturation region acts as _________ and in the cut off region acts as _________.

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SSC JE Electrical 14 Nov 2022 Shift 3 Official Paper
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  1. closed switch; amplifier
  2. amplifier; open switch
  3. open switch; closed switch 
  4. closed switch; open switch

Answer (Detailed Solution Below)

Option 4 : closed switch; open switch
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Transistor

F1 Vinanti Engineering 26.12.22 D18

A transistor is a three-layer, three-terminal device.

The three layers can be (n-p-n or p-n-p) and the three terminals are the collector, base, and emitter.

Transistor when working in the saturation region acts as a closed switch (ON Button) and in the cut-off region acts as an open switch (OFF Button).

F1 Vinanti Engineering 26.12.22 D19

Working modes of transistor

Mode

Emitter Junction

Collector Junction

Application

Cut-off

Reverse bias

Reverse bias

OFF Button

Active

Forward bias

Reverse bias

Amplifier

Saturation

Forward bias

Forward bias

ON Button

Reverse active

Reverse bias

Forward bias

Attenuator

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