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NEET2012PhysicsSemiconductorsActual

The input resistance of a silicon transistor is 100 . Base current is changed by 40 A which results in a change in collector current by 2 ~mA . This transistor is used as a common-emitter amplifier with a load resistance of 4 k . The voltage gain of the amplifier is

Options

  1. A2000
  2. B3000
  3. C4000
  4. D1000

Correct answer

A. 2000

Step-by-step solution

We know V_g= R_L R_i = I_C I_B R_L R_i ( = I_C I_B ) On putting given values aligned & V_g= 2 10⁻³ 40 10⁻⁶ 4 10^3 100 & V_g=2000 aligned

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