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NEET AIPMT SOLVED PAPER SCREENING 2009

  • question_answer
    A transistor is operated in common-emitter configuration at \[\frac{\pi a\sqrt{3}}{2T}\] volt such that a change in the base current from 100 \[\frac{\pi a}{T}\] to 200 \[\frac{3{{\pi }^{2}}a}{T}\]produces a change in the collector current from 5 mA to 10 mA. The current gain is

    A) 75   

    B)                                        100                        

    C)        150                        

    D)        50

    Correct Answer: D

    Solution :

    For a transistor \[=200-180=20\,\text{J}\] where   \[\overrightarrow{r}\] emitter current \[\overrightarrow{F}.\] base current \[\overrightarrow{\tau }=\overrightarrow{r}\times \overrightarrow{F}\]collector current and current gain \[\overrightarrow{r}\] \[\overrightarrow{F}\] \[\therefore \] \[\overrightarrow{\tau }.\overrightarrow{r}=0\]


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