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AFMC AFMC Solved Paper-2006

  • question_answer
    An amplifier has a voltage gain Ay = 1000. The voltage gain in dB is:

    A) 30 dB                                    

    B) 60 dB

    C) 3 dB                                      

    D) 20 dB

    Correct Answer: A

    Solution :

    Voltage gain. \[{{A}_{v}}=1000\] In dB, voltage gain \[A=10{{\log }_{10}}1000\,dB\] \[=(10\times 3)lo{{g}_{10}}10\,dB\] = 30 dB                                        \[(\because \,lo{{g}_{10}}10=1)\]     


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