A.\({i^2} = \frac{C}{L}\left( {U_0^2 - {u^2}} \right)\)
B.\({i^2} = \frac{L}{C}\left( {U_0^2 - {u^2}} \right)\)
C.\({i^2} = LC\left( {U_0^2 - {u^2}} \right)\)
D.\({i^2} = \sqrt {LC} \left( {U_0^2 - {u^2}} \right)\)

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