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MHT CET202611 April 2026Evening ShiftPhysicsSemiconductorsActual

In common emitter mode of transistor, the d.c. current gain is 20 , the emitter current is 7 mA. The collector current is

Options

  1. A14 3 mA
  2. B20 3 mA
  3. C7 3 mA
  4. D8 3 mA

Correct answer

B. 20 3 mA

Step-by-step solution

Given the d.c. current gain in common emitter mode, = 20 Emitter current, I_E = 7 mA The relation between current gain in common base mode ( ) and common emitter mode ( ) is given by: = 1 + Substituting the value of : = 20 1 + 20 = 20 21 We also know that = I_C I_E , where I_C is the collector current. Therefore, I_C = I_E Substituting the values: I_C = 20 21 7 = 20 3 mA Answer: 20 3 mA

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