So, now that we know what electrical work is and what charges, we can rearrange this formula to give us the change in electric potential. So, by bringing this guy over to this side, we get electrical work divided by charge. And by the way, electrical work, like any work, has the units of Joules. So the units of electrical work divided by charge is Joules divided by Coulomb. And this equals our changing electrical potential, which is also the voltage difference. And which is also what we said before is the electromotive force or EMF.