AMU Medical AMU Solved Paper-2013

  • question_answer
    In an n-p-n transistor circuit, the collector current is 10 mA. If 90% of the electrons emitted reach the collector

    A)  the emitter current will be nearly 9 mA and the base current will be nearly 1 mA

    B)  the emitter current will be nearly 11 mA and the base current will be nearly 9 mA

    C)  the emitter current will be nearly 11 mA and the base current will be nearly 1 mA

    D)  the emitter and base currents will be 10 mA and 1 mA respectively

    Correct Answer: C

    Solution :

                     Given that                 \[{{i}_{c}}=10\,mA\] According to question                 \[{{i}_{E}}\times \frac{90}{100}=10\]                 \[{{i}_{E}}\approx 11\,mA\] Now from           \[{{i}_{E}}={{i}_{b}}+{{i}_{c}}\]                                 \[{{i}_{b}}=1\,mA\]


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