An LC circuit contains a \( 20 \mathrm{mH} \) inductor and a \( 50 \mu \mathrm{F} \) capacitor w...

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An LC circuit contains a \( 20 \mathrm{mH} \) inductor and a \( 50 \mu \mathrm{F} \) capacitor with an initial charge of \( 10 \mathrm{mC} \). The resistance of the circuit is negligible. At the instant the circuit is closed be \( t=0 \). At what time is the energy stored completely magnetic
[AMU (Engg.) 2009]
(a) \( t=0 \)
(b) \( t=1.54 \mathrm{~ms} \)
(c) \( t=3.14 \mathrm{~ms} \)
(d) \( t=6.28 \mathrm{~ms} \)
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