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MHT CET202123 Sep 2021Evening ShiftPhysicsSemiconductorsActual

In common emitter amplifier, a change of 0.2 ~mA in the base current causes a change of 5 ~mA in the collector current. If input resistance is 2 k and voltage gain is 75 , load resistance used in the circuit is

Options

  1. A8 k
  2. B4 k
  3. C12 k
  4. D6 k

Correct answer

D. 6 k

Step-by-step solution

= I _ C I _ b = 5 0.2 =25 Voltage gain, A_v= R_L R_i R _ L = A _ v R _ i = 75 2 25 =6 k

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