2. Solved Papers
  3. JAMIA MILLIA ISLAMIA

JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2015

  • question_answer
    For a transistor amplifier in common emitter configuration for a load impedance of \[{{m}_{1}}\times {{m}_{2}}\]\[\frac{{{\lambda }_{1}}}{{{\lambda }_{2}}}\], the current gain is

    A) \[-48.78\]                           

    B) \[-52\]

    C) \[-24.8\]             

    D) \[-15.7\]

    Correct Answer: A

    Solution :

    In terms of hybrid parameter, the current gain is given by \[{{f}_{o}}=10\times 4\] Here,     \[=\text{ 4}0\text{ cm}\]                 \[Z=\sqrt{{{R}^{2}}+4{{\pi }^{2}}{{f}^{2}}{{L}^{2}}}\]                 \[=\sqrt{{{1}^{2}}+4{{\pi }^{2}}(50)\times {{2}^{2}}}\]                 \[=\sqrt{394385}\] \[=628\]


You need to login to perform this action.
You will be redirected in 3 sec spinner