A 6.20 nF capacitor is charged to 21.0 V then disconnected from the battery in the circuit and connected in series with a coil that has L = 0.0650 H and negligible resistance.
After the circuit has been completed, there are current oscillations.At an instant when the charge on the capacitor is 0.0500μC ,
what is the magnitude of the voltage across the capacitor ? Express your answer with the appropriate units.