Inductance HW Question?

Question

LC circuit consists of a 20.0 mH inductor and a 0.100 µF capacitor. If the maximum instantaneous current is 0.250 A, what is the greatest potential difference across the capacitor?

___ V

Answer 1

V = 5 millivolts

Answer 2

Max. inductor energy LI^2/2 = max capacitor energy CV^2/2.

V(max) = sqrt(LI^2/C) = 111.8 V