The following 7% is supplied by different sources like hydro-dams, wind farms, solar cells and so on. It is important to notice that electricity is a secondary source of energy, meaning it depends on a first source of power to be made. These first sources are the ones noted above, and can further be broken down into replenish-able and non-renewable sources.

As highlighted a first source of energy is needed to generate electrical power, this power source is used to superheat water in a boiler to form steam. The steam outputted from boiler is of such a high pressure that it can turn the blades of a turbine. The turbine works turn to the linear motion of the steam into round about motion. Attached to this is a generator which homes a big magnet trapped by coiled copper wire, the motion of the blades in turn, swiftly spin the magnet which creates an electric current in the copper coil.

From the generator the electricity heads to transformer, where its voltage is stepped up significantly ( generally 345,000 volts ), which permits it to be transferred a long distance without any loss. The electricity is then placed on the nation's grid, where to start with it is carried by enormous transmission lines, able of handling the high voltages.

Across the grid there are many step-down transformers which act to cut back the voltage to a rather more controllable twelve thousand volts OK for the distribution lines. Before the electricity reaches your house it is stepped down once again to 240 volts.This happens in the little transformers that you frequently see at the very top of your community power line pole.