VIT Engineering VIT Engineering Solved Paper-2014

  • question_answer
    An L-C-R circuit contains \[R=50\Omega ,\] L = 1 mH and \[C=0.\mu F.\]The impedance of the circuit will be minimum for a frequency of

    A) \[\frac{{{10}^{5}}}{2\pi }Hz\]   

    B) \[\frac{{{10}^{6}}}{2\pi }Hz\]

    C) \[2\pi \times {{10}^{5}}Hz\]        

    D) \[2\pi \times {{10}^{6}}Hz\]

    Correct Answer: A

    Solution :

    Impedance of L-C-R circuit will be minimum for a resonant frequency so,                     \[=2.81\times {{10}^{-23}}c{{m}^{3}}\]                     \[\underset{\left( nolp \right)}{\mathop{NH_{4}^{+}}}\,>\underset{\left( 1lp \right)}{\mathop{N{{H}_{3}}}}\,>\underset{\left( 2lp \right)}{\mathop{NH_{2}^{-}}}\,\]                     \[{{k}_{f}}=1.1\times {{10}^{-2}},{{k}_{b}}=1.5\times {{10}^{-3}}\]                                                                                                   


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