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NEET Sample Paper NEET Sample Test Paper-31

  • question_answer
    In the circuit shown in figure, the supply has constant rms value V but variable frequency f. Calculate the frequency at which the voltage drop across R is maximum -

    A)  100 Hz        

    B)  500 Hz               

    C)  300 Hz

    D)  None    

    Correct Answer: B

    Solution :

    It happens at resonance \[f=\frac{1}{2\pi \sqrt{LC}}=\frac{1}{2\pi \sqrt{\frac{1}{\pi }\left( \frac{1}{\pi }\times {{10}^{-6}} \right)}}\] \[=\frac{1}{2\times {{10}^{-3}}}=500\]


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