thumb|A turbo generator transforms the energy of pressurized steam into electrical energy. Energy may be transformed between different forms at various efficiencies. Items that transform between these forms are called transducers. Examples of transducers include a battery (from chemical energy to electric energy), a dam (from gravitational potential energy to kinetic energy of moving water (and the blades of a turbine) and ultimately to electric energy through an electric generator), and a heat engine (from heat to work).
thumb|A turbo generator transforms the energy of pressurized steam into electrical energy. Energy may be transformed between different forms at various efficiencies. Items that transform between these forms are called transducers. Examples of transducers include a battery (from chemical energy to electric energy), a dam (from gravi,tational potential energy to kinetic energy of moving water (and the blades of a turbine) and ultimately to electric energy through an electric generator) and a heat engine (from heat to work).