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JEE Main & Advanced Physics Semiconducting Devices Question Bank Junction Transistor

  • question_answer
    In a common emitter transistor, the current gain is 80. What is the change in collector current, when the change in base current is 250 mA                                                     [CBSE PMT 2000]

    A)            80 ´ 250 mA                           

    B)            (250 ? 80) mA

    C)            (250 + 80) mA                       

    D)            250/80 mA

    Correct Answer: A

    Solution :

               Current gain \[\beta =\frac{\Delta {{i}_{c}}}{\Delta {{i}_{b}}}\]\[\Rightarrow \Delta {{i}_{c}}=\beta \times \Delta {{i}_{b}}\]= 80 ´ 250 mA.


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