JEE Main & Advanced Physics Alternating Current / प्रत्यावर्ती धारा Question Bank ac Circuits

  • question_answer
    In LCR circuit, the capacitance is changed from C to 4C. For the same resonant frequency, the inductance should be changed from L to                                   [MP PMT 1986; BHU 1998]

    A)            2L  

    B)            L / 2

    C)            L / 4                                          

    D)            4 L

    Correct Answer: C

    Solution :

               \[\omega =\frac{1}{\sqrt{{{L}_{1}}{{C}_{1}}}}=\frac{1}{\sqrt{{{L}_{2}}{{C}_{2}}}}\Rightarrow \,{{L}_{2}}=\frac{{{L}_{1}}}{4}\]


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