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2) In ##U = \frac{1}{2}LI^2 + \frac{1}{2}\frac{Q^2}{C}##

##E = \frac{1}{2}mv^2 + \frac{1}{2}kx^2## where ##x(t) = Acos(wt + \phi)##

following this pattern where ##k = \frac{1}{C}## and x = Q, ##q(t) = q_0cos(wt+\phi)##, m = L, v = I; could x= I and k = L so that ##I(t) = I_0cos(wt + \phi)##?