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NEET2009PhysicsSemiconductorsActual

A transistor is operated in common-emitter configuration at V_c=2 volt such that a change in the base current from 100 A to 200 A produces a change in the collector current from 5 ~mA to 10 ~mA . The current gain is

Options

  1. A75
  2. B100
  3. C150
  4. D50

Correct answer

D. 50

Step-by-step solution

For a transistor aligned & where array l I _ E = I _ B + I _ C I _ E = emitter current I _ B = base current I _ C = collector current and current gain = I _ C I _ B I _ C =5 10⁻³ ~A I _ B =100 10⁻⁶ ~A = 5 100 1000=50 array aligned

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