So that means in electrochemical cells called voltaic cells, electrons flow from the Higher electric potential electrode, the lower electric potential electrode. So that means they travel from the anode electrode to the cathode electrode. So we can define something called the electromotive force or simply EMF as the difference in this electric potential between the anode and the cathode. So to really understand what the Electric Motor Force is, we have to explore a concept called Electric Potential Energy. So electric potential energy, or simply electrical work is equal to the charge of an object times the change in electrical potential. Now, we just said the change in electrical potential between the animal and the capital is simply EMF.