Electric Potential of Only One Charge

The electric potential of only one charge is given by: where is the distance between the charge and the point where we measure our voltage. So the only thing that has an influence on voltage is the distance . The bigger becomes, the smaller will V be. If we want to measure the voltage from point P1 to point P2, then the voltage must be: , where is the distance from the charge to P1, and is the distance from to P2. From the following equation: , we can conclude that the bigger the difference between and becomes, the greater become the voltage between them.