The current during electrical oscillations in the oscillating circuit changes over time depending on the dependence I(t) =Imax sin(8πt / t0 +π/5), t0-constant, Imax - amplitude value of current. Find the period of oscillations. Write an expression for the time change of charge. Determine the amplitude value of the charge.

It is d, all the other ones say incorrect answer .

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.