  We study the nature of currents, input energy and entropy production in
different types of adiabatically rocked ratchets using the method of stochastic
energetics. The currents exhibit a peak as a function of noise strength. We
show that there is no underlying resonance or synchronisation phenomena in the
dynamics of the particle with these current peaks. This follows from the
analysis of energy loss in the medium. We also show that the maxima seen in
current as well as the total entropy production are not directly correlated.
