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. So this is our EMF. So in order to understand what the EMF is, we have to really understand what charges and what electrical work or electrical potential energy is. So let's look at electrical work first.