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AP EAMCET2013PhysicsSemiconductors

The base current in a transistor circuit changes from 45 A to 140 A . Accordingly, the collector current changes from 0.2 ~mA to 0.400 ~mA . The gain in current is

Options

  1. A9.5
  2. B1
  3. C40
  4. D20

Correct answer

C. 40

Step-by-step solution

aligned & Current gain = i_c i_b & i_c=(4-0.2) mA =3.8 10⁻³ ~A & i_b=(140-45) A =95 10⁻⁶ ~A & = 3.8 10⁻³ 95 10⁻⁵ =40 & aligned

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