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JEE Main & Advanced Physics Alternating Current / प्रत्यावर्ती धारा Question Bank Self Evaluation Test - Alternating Current

  • question_answer
    In a LCR circuit capacitance is changed from C to 1C. For the resonant frequency to remain unchanged, the inductance should be change from L to

    A) 4L

    B) 2L   

    C) \[L/2\]

    D) \[L/4\]

    Correct Answer: C

    Solution :

    [c] Resonance frequency, \[{{\omega }_{0}}=\frac{1}{\sqrt{LC}}=\frac{1}{\sqrt{L'(2C)}}\]   \[\therefore \,\,\,L'=\frac{L}{2}\].


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