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AP EAMCET2002PhysicsSemiconductors

In a transistor circuit, when the base current is increased by 50 micro-amperes keeping the collector voltage fixed at 2 volts, the collector current increases by 1 ~mA . The current gain of the transistor is

Options

  1. A20
  2. B40
  3. C60
  4. D80

Correct answer

A. 20

Step-by-step solution

Increase in base current I_b=50 A Increase in collector current I_c=1 ~mA Current gain = I_c I_b = 1 10⁻³ 50 10⁻⁶ = 10^3 50 =20

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