Can the net motion of electrons in an AC circuit be considered an example of simple harmonic oscillation. Furthermore, how can the general formulae of SHM be adapted to suit a scenario of an AC current. More specifically how can formulae such as $a=-\frac{k \Delta x}{m}$ or $x=Acos(\omega t + \delta)$ be expressed in parameters more relevant to electricity (e.g. Voltage or net electron displacement).