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Concepts Of Physics MCQ Edition [Volume 2]PhysicsSemiconductors and Semiconductor Devices

An amplifier circuit employs a transistor in common-emitter mode, with a load resistor of 2 k connected in the collector branch. The transistor has a current gain = 50 and an input resistance of 0.50 k . When the input current is altered by 50 A , determine the change in the output voltage.

Options

  1. A12.5 V
  2. B5.0 V
  3. C2.5 V
  4. D0.1 V

Correct answer

B. 5.0 V

Step-by-step solution

The given parameters are: Current gain, = 50 Load resistance, R_L = 2 k = 2 10^3 Change in input current, I_B = 50 A = 50 10⁻⁶ A The change in output current (collector current) is given by: I_C = I_B I_C = 50 50 10⁻⁶ A = 2.5 10⁻³ A The change in output voltage across the load resistor is: V_ out = I_C R_L V_ out = 2.5 10⁻³ 2 10^3 V = 5.0 V

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