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CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2010

  • question_answer
    The collector supply voltage is 6 V and the voltage drop across a resistor of\[600\,\Omega \]. in the collector circuit is 0.6 V, in a transistor connected in common emitter mode. If the current gain is 20, the base current is

    A)  0.25mA               

    B)         0.05mA

    C)  0.12mA               

    D)         0.02mA

    E)  0.07mA

    Correct Answer: B

    Solution :

    \[{{i}_{C}}{{R}_{C}}={{V}_{C}}\] \[{{i}_{C}}=\frac{{{V}_{C}}}{{{R}_{C}}}=\frac{0.6}{600}=1\,mA\] \[\therefore \]  \[\beta =\frac{{{i}_{C}}}{{{i}_{B}}}\] Or           \[{{i}_{B}}=\frac{{{i}_{C}}}{\beta }=\frac{1}{20}=0.05\,mA\]


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