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AP EAMCET2016PhysicsSemiconductors

For a common-emitter transistor amplifier, the current gain is 60 . If the emitter current is 6.6 ~mA , then its base current is

Options

  1. A6.492 ~mA
  2. B0.108 ~mA
  3. C4.208 ~mA
  4. D0.343 ~mA

Correct answer

B. 0.108 ~mA

Step-by-step solution

aligned & Using l_ E =l_ B +l_ C & l_ B =l_ E -l_ C & =6.6 10⁻³-60 l_ B & l_ B +60 l_ B =6.6 10⁻³ & or 61 l_ B =6.6 10⁻³ & l_ B = 6.6 10⁻³ 61 0.108 ~mA & =0.108 10⁻³ & =0.108 ~mA aligned

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