J & K CET Medical J & K - CET Medical Solved Paper-2008

  • question_answer
    The natural frequency (\[{{\omega }_{0}}\]) of oscillations in L-C circuit is given by

    A) \[\frac{1}{2\pi }\frac{1}{\sqrt{LC}}\]                       

    B) \[\frac{1}{2\pi }\sqrt{LC}\]                          

    C) \[\frac{1}{\sqrt{LC}}\]                                   

    D) \[\sqrt{LC}\]

    Correct Answer: A

    Solution :

                     Natural frequency is nothing but resonant frequency. In this case \[{{X}_{L}}={{X}_{C}}\] \[\Rightarrow \]               \[{{\omega }_{0}}L=\frac{1}{{{\omega }_{0}}C}\] \[\Rightarrow \]               \[\omega _{0}^{2}=\frac{1}{LC}\] \[\Rightarrow \]               \[{{\omega }_{0}}=\frac{1}{\sqrt{LC}}\] \[\Rightarrow \]               \[2\pi f=\frac{1}{\sqrt{LC}}\] Or           \[f=\frac{1}{2\pi \sqrt{LC}}\]


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