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Question 20267
JEE Physics · Medium

Semiconductors: Transistor — Current Gain Calculation MCQ

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Transistor — Current Gain CalculationMediumQuestion 20267

Question

A transistor has I_E = 2 mA and I_B = 20 μA. β is:
  1. A
    100
  2. B
    98
  3. C
    0.99
  4. D
    99
    Correct

Correct answer

99

Explanation

I_C = I_E − I_B = 2 mA − 0.02 mA = 1.98 mA. β = I_C/I_B = 1.98/0.02 = 99.

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