If the distance between two charged particles is quadrupled, the magnitude of the electric force each exerts on the other is changed. If you wanted to change the amount of charge on each of the particles by the same amount so that the force between them went back to its original value, what would you do? If the distance between two charged particles is quadrupled, the magnitude of the electric force each exerts on the other is changed. If you wanted to change the amount of charge on each of the particles by the same amount so that the force between them went back to its original value, what would you do? increase each charge by sixteen times increase each charge by four times decrease each charge to one-fourth its original value.