Electric generator works on principle of electromagnetic induction discovered by Michael Faraday which reveals alternating magnetic fields induce an alternating electric current within the conducting materials in their immediate vicinity. These alternating magnetic fields’ can be produced in many ways.

As the strength of the magnetic field is inversely proportional to the distance from the source, alternating magnetic fields can be produced by continuously fluctuating the distance between the conducting material and the source of magnetism.

In his very first experiments Faraday had kept the distance of horse-shoe magnet altering from the copper coil using some sort of spring mechanism to induce the current. However, in later experiments it was revealed that rotating the coil in a strong magnetic field using a mechanism like crank shaft produced same effect and was also much more cost-effective.

To produce electricity on large scale, turbines are used in place of crank shafts that induce currents in huge generators and electrical connectors. Rotation of these gigantic turbines, which have four to five electrical outlets, at highest ‘revolutions per minute’ requires a huge amount of mechanical energy that is obtained by high speed of flowing water in dams or by releasing steam under pressure through a tiny nozzle that causes the turbines to rotate.

In hydro-electric power plants turbines are placed in way between rapidly flowing water jets. This is the most clean, simple source of electric energy. However, they have a very high cost and erection of dams causes a very large area to permanently submerge under-water.

Other types of power-stations use thermal-power or nuclear power to convert water into steam that can be released under pressure from a tiny nozzle that causes the turbines to rotate.

Thus, it’s not surprising that the usage of electrical supply has increased so dramatically. The website of inLine electrical, offers more of these appropriate uses.