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MHT CET202519 Apr 2025Evening ShiftPhysicsSemiconductorsActual

In a transistor amplifier, AC current gain is 64 , the load resistance is 5400 and the input resistance of the transistor is 540 . The voltage gain is

Options

  1. A540
  2. B600
  3. C640
  4. D6400

Correct answer

C. 640

Step-by-step solution

The voltage gain A_v of a transistor amplifier follows the relationship A_v = A_i R_L R_ in , where A_i = 64 is the AC current gain, R_L = 5400 the load resistance, and R_ in = 540 the input resistance. Substituting the values yields A_v = 64 5400 540 . The resistance ratio simplifies to 10 , giving A_v = 64 10 = 640 . The calculated voltage gain corresponds to option C .

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