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AMU Medical AMU Solved Paper-2001

  • question_answer
    In a series L-C circuit L = 0.405 H and\[\text{C}=\text{25}\,\mu \text{F}.\]The resistance R is zero. The frequency of resonance is

    A)  30 Hz                                   

    B)  25 Hz

    C)  50 Hz                                   

    D)  20 Hz

    Correct Answer: C

    Solution :

                     The frequency \[(f)\] at resonance is given by                 \[f=\frac{1}{2\pi \,\sqrt{LC}}\] Given,   L = 0.405 H,                 \[C=25\mu F=25\times {{10}^{-6}}F\] \[\therefore \]  \[f=\frac{1}{2\pi \,\sqrt{0.405\times (25\times {{10}^{-6}})}}\] \[\Rightarrow \]               \[f=50\,Hz\]


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