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NEET AIPMT SOLVED PAPER SCREENING 2011

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

    A)  75        

    B)         100                       

    C)         25                         

    D)         50

    Correct Answer: D

    Solution :

    \[\beta =\frac{\Delta {{I}_{C}}}{\Delta {{I}_{B}}}=\frac{(20-10)mA}{(300-100)mA}=\frac{10\times {{10}^{-3}}}{300\times {{100}^{-6}}}=50\]


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