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The current gain of a common emitter amplifier is 69 . If the emitter current is 7 . 0 mA , collector current is :

Options

  1. A69   mA
  2. B0 . 69   mA
  3. C6 . 9   mA
  4. D9 . 6   mA

Correct answer

C. 6 . 9   mA

Step-by-step solution

β = 69 = I C I B α = β 1 + β = 69 70 = I C I E I C = I E × 69 70 I C = 69 70 × 7 I C = 6.9   mA .

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