Electricity

              Electricity is a basic part of nature and it is one of our most widely used forms of energy. We get electricity, which is a secondary energy source, from the conversion of other sources of energy, like coal, natural gas, oil, nuclear power, solar, wind and other natural sources, which are called primary sources. Many cities and towns were built alongside waterfalls that turned water wheels to perform work.

       The principles of electricity gradually became understood. In the mid-1800s, everyone's life changed with the invention of the electric light bulb. Prior to 1879, electricity had been used in arc lights for outdoor lighting. The lightbulb's invention used electricity to bring indoor lighting to our homes.

Generation of electricity

       An electric generator is a device for converting mechanical energy into electrical energy. The process is based on the relation between electricity & Magnetism. When wire or electrically conductive material moves across a magnetic field, an electric current occurs in that material. A magnet attached to the end of a rotating shaft. When the magnet rotates, it induces a small electric current in each section of wire as it passes. All the small currents of individual sections add up to one current of considerable size. This electric current is what is used for electric power. 
             Electric utility power station uses either a turbine, engine, water wheel, or other similar machine to drive an electric generator. The large generators used by the electric utility industry have a stationary conductor.

Types of natural resources 

1) Conventional sources

2) Non-conventional sources