What is overall gain of the given below darlington pair?

This question was previously asked in
RSMSSB JE Electrical (Diploma) 19 May 2022 Official Paper
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  1. 300
  2. 3000
  3. 20000
  4. 100

Answer (Detailed Solution Below)

Option 3 : 20000
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Detailed Solution

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Darlington Transistor

The Darlington Transistor is a special arrangement of two standard NPN or PNP bipolar junction transistors (BJT) connected. 

The Emitter of one transistor is connected to the base of the other to produce a more sensitive transistor with a much larger current gain being useful in applications where current amplification or switching is required.

Calculation

Given, 

β = 100 × 200 = 20000

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