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NEET Sample Paper NEET Sample Test Paper-2

  • question_answer
    In a common base transistor \[{{I}_{c}}={{I}_{a}}{{I}_{b}},\] load and plate resistance are \[4K\Omega \] and \[1K\Omega \]. The voltage gain of amplifier will be:

    A)  \[80\]

    B)  \[4.2\]

    C)  \[3.8\]

    D)  \[76\]

    Correct Answer: C

    Solution :

    We have, \[a=\frac{{{i}_{c}}}{{{i}_{e}}}=\frac{{{i}_{c}}}{{{i}_{c}}+{{i}_{b}}}=\frac{19{{i}_{b}}}{19{{i}_{b}}+{{i}_{b}}}=\frac{19}{20}\] Voltage gain \[=\frac{19}{20}\times \frac{4}{1}=3.8\]


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