Some energy is lost in most machines, in most energy transformations. In the case of Transformers, the main problem is eddy currents - unwanted currents, that are minimized, but not eliminated completely, by laminating the iron.
Part of the energy is lost in heat by processes in the transformer. That is usually only 1-2% for power supply transformers. The remainder is passed on to the load.
Transformers Animated - 2007 Lost and Found 1-11 is rated/received certificates of: Australia:PG
Transformers Animated - 2007 Lost and Found 1-11 was released on: USA: 1 March 2008
Energy is lost during the generation, transmission, and distribution of electricity from power stations to homes in the form of heat due to resistance in power lines and transformers. This energy loss is known as transmission and distribution loss, and it occurs as electricity travels long distances over power lines. Transformers are also used to step up or step down voltage, which can result in additional energy loss.
Transformers inherently do not have frictional losses, but transformers and rotating machines perform completely different functions, so I'm not sure it is fair to compare them. Transformers are used to transform electric energy (the input is electric energy, and the output is electric energy). Rotating machines either take electric energy and convert it to mechanical/kinetic energy, or take kinetic energy and convert it to electric energy.
Transformers.
They are energy transformers. They convert light energy to chemical energy
Energy transmission is not possible without transformers. Therefore, transformers are an integral part of the transmission system. High voltages achieved using transformers result in lower currents which, in turn, allow conductors of smaller cross-sectional area to be used with transmission lines. In this sense, transformers might be thought of as 'reducing the cost of energy transmission', but as its impossible to transmit energy without transformers this is of academic interest only.
Power is conserved in transformers provided you allow for the heat lost in the transformer. The input power is split between output power, heat loss in the copper-wire windings and heat loss in the iron core. Obviously designers try to make the efficiency as high as possible subject to other constraints, mainly cost, and high-power transformers can have a transfer efficiency of 99%.
Energy is never lost or destroyed.
The most important transformers of energy in ecosystems are producers (such as plants) that convert sunlight into chemical energy through photosynthesis, and decomposers (such as bacteria and fungi) that break down organic matter into simpler compounds and release nutrients back into the ecosystem. These transformers play crucial roles in the flow of energy through the food chain.
I believe they are, and they are still both hot.