Water Energy Converting Into Electrical energy
When water is stored at a suitable place, it posses potential energy because of the head or height created. Whenever this water flows towards turbine the potential energy is converted into kinetic energy. After that turbine starts to rotate, at this time kinetic energy is converted into mechanical energy.
The Water turbine & generator are mechanically coupled, when turbine starts to rotate simultaneously generator starts to rotate, the mechanical energy is converted into electrical energy. This type arrangement is done in hydro-electric power plant.