Which physical quantity is there in A.C. circ | vedclass

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(C) In an $A.C.$ circuit,the oscillation of charge $q$ is analogous to the displacement $x$ in mechanical simple harmonic motion. The current $I$ is t

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(C) In an $A.C.$ circuit,the oscillation of charge $q$ is analogous to the displacement $x$ in mechanical simple harmonic motion. The current $I$ is the rate of change of charge,$I = dq/dt$,which is analogous to velocity $v = dx/dt$. Therefore,the charge $q$ acts as the displacement variable in the differential equation of an $LCR$ circuit,which is $L(d^2q/dt^2) + R(dq/dt) + q/C = E(t)$.

Which physical quantity is there in $A.C.$ circuit as displacement variable?

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