Which of the following changes would decrease the force between two charged particles by a factor of 9? A.
Increasing the amount of charge on each particle by a factor of 9
close

B.
Decreasing the distance between the particles by a factor of 3
done

C.
Increasing the distance between the particles by a factor of 3

D.
Decreasing the amount of charge on one of the particles by a factor of 3

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.