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NEET Sample Paper NEET Sample Test Paper-85

  • question_answer
    In an p-n-p transistor working as a common base amplifier current gain is 0.96 and emitter current is 7.2 mA. The base current is

    A) 0.5 mA 

    B)        0.29 mA

    C) 0.35 mA           

    D)        0.4 mA

    Correct Answer: B

    Solution :

    [b] For common base Current gain\[=\frac{{{I}_{c}}}{{{I}_{e}}}=0.96\] \[{{I}_{c}}={{I}_{e}}\times 0.96=0.96\times 7.2=6.912\] \[{{I}_{b}}={{I}_{e}}-{{I}_{c}}=7.2-6.912\] \[=0.288\approx 0.29\,\,mA\]


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