A particle with charge −5 µC is located on the x-axis at the point 8 cm , and a second
particle with charge 3 µC is placed on the
x-axis at 6 cm .What is the magnitude of the total electrostatic force on a third particle with charge
7 µC placed on the x-axis at −2 cm ? The
Coulomb constant is 8.9875 × 109 N · m2
/C
2
.
Answer in units of N.

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.

Answerit increases at a steady rate;

1. electricity2. discharge: )