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JEE Main & Advanced Physics Semiconducting Devices Question Bank Self Evaluation Test - Semiconductor Electronics: Materials, Devices and Simple Circuits

  • question_answer
    A transistor is operated in common emitter configuration at \[{{V}_{C}}=2V\] such that a change in the base current from \[100\,\mu A\] to \[300\,\mu A\] produces a change in the collector current from \[10\,mA\] to\[20\,mA\]. The current gain is

    A)  \[50\] 

    B)                     \[75\]    

    C)  \[100\]             

    D)         \[25\]

    Correct Answer: A

    Solution :

    [a] The current gain \[\beta =\frac{\Delta {{I}_{C}}}{\Delta {{I}_{B}}}=\frac{10mA}{200\,\mu A}=\frac{10\times {{10}^{3}}}{200}=50\]  


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