Which of the following is not true about electric fields? they always pull, never push

it has positives and negatives

It pulls with field lines that can be thought of like ropes.

It can cancel out with equal opposite charges

Pe = 1/2k(x)^2  and .05n/m = .05x10^-9m = x 

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.