A 40 cm-long thin wire has a linear charge density of 10 C/cm, and a small particle (positioned 10 cm away from the center of the wire) is uniformly charged to 10 C. What is the electric field strength E (magnitude and direction) exactly midway between the particle and the wire

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.