A fully charged capacitor C with intial charge

Question:

A fully charged capacitor $\mathrm{C}$ with intial charge $\mathrm{q}_{0}$ is connected to a coil of self inductance $\mathrm{L}$ at $\mathrm{t}=0$. The time at which the energy is stored equally between the electric and the magnetic fields is :-

  1.  $2 \pi \sqrt{\mathrm{LC}}$

  2. $\sqrt{\mathrm{LC}}$

  3.  $\pi \sqrt{\mathrm{LC}}$

  4.  $\frac{\pi}{4} \sqrt{\mathrm{LC}}$


Correct Option: , 4

Solution:

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