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JEE Main & Advanced JEE Main Paper (Held On 22 April 2013)

  • question_answer
    An LCR circuit as shown in the figure is connected to voltage source \[{{\operatorname{V}}_{\operatorname{ac}}}\] whose frequency can be varied. The frequency, at which the voltage across the resistor is maximum, is:   JEE Main  Online Paper (Held On 22 April 2013)

    A)  902 Hz                  

    B)  143 Hz

    C)  23 Hz                    

    D)  345 Hz

    Correct Answer: C

    Solution :

     Frequency \[f=\frac{1}{2\pi \sqrt{LC}}\] \[=\frac{1}{2\times 3.4\sqrt{24\times 2\times {{10}^{-4}}}}\] \[=23Hz\]


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