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MHT CET202523 Apr 2025Morning ShiftPhysicsSemiconductorsActual

In a common emitter transistor amplifier circuit, the current gain =0.8 . If the base current changes by 3 A then the collector current changes by

Options

  1. A4 A
  2. B6 A
  3. C12 A
  4. D24 A

Correct answer

C. 12 A

Step-by-step solution

The common emitter current gain relates to the common base current gain = 0.8 through the formula = 1 - = 0.8 0.2 = 4 . For a transistor in common emitter configuration, the change in collector current relates to the base current change as I_C = I_B . With I_B = 3 A , the collector current changes by I_C = 4 3 A = 12 A . Final answer: 12 A

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