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CMC Medical CMC-Medical Ludhiana Solved Paper-2011

  • question_answer
    For a transistor, the current amplication factor is 0.8, the transistor is connected in common-emitter configuration. The change in the collector current when the base current changes by 6 mA is

    A)  6 mA                                    

    B)  4.8 mA

    C)  24 mA                                 

    D)  8 mA

    Correct Answer: C

    Solution :

                                    \[\alpha =0.8\] \[\beta =\frac{\alpha }{1-\alpha }\] \[=\frac{0.8}{1-0.8}=4\] \[\beta =\frac{\Delta \,{{I}_{C}}}{\Delta \,{{I}_{B}}}\] or \[\Delta \,{{I}_{C}}=\beta \,\Delta \,{{I}_{B}}\] \[=4\times 6\] \[=24\,mA\]


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