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NEET NEET SOLVED PAPER 2017

  • question_answer
    In a common emitter transistor amplifier the audio signal voltage across the collector is 3 V. The resistance of collector is\[3\,k\Omega .\]If current gain is 100 and the base resistance is \[2\,k\Omega ,\] the voltage and power gain of the amplifier is                                                                                                                                                  

    A)  20 and 2000      

    B)  200 and 1000

    C)   15 and 200                        

    D)   150 and 15000

    Correct Answer: D

    Solution :

                     Current gain\[(\beta )=100\] Voltage gain \[({{A}_{V}})=\beta \frac{{{R}_{c}}}{{{R}_{b}}}\]                                 \[=100\left( \frac{3}{2} \right)\]                                 \[=150\] Power gain         \[={{A}_{v}}\beta \]                                 \[=150\,(100)\]                                 = 15000


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