Sources of Electricity

Electricity, also known as electrical energy, is a fundamental form of energy that is generated in facilities called power plants by converting other sources of energy into usable electricity. Different types of power plants rely on distinct sources, such as burning fuels, rapidly flowing water, rushing wind, or the nucleus of an atom, to produce the electrical energy that powers devices, homes, and industries.

Pioneers and everyday uses of electricity

Before modern discoveries, the world lacked electrical power to operate devices and machines. In 1752, the scientist Benjamin Franklin made a major discovery, which was later developed across different eras by Michael Faraday, Alessandro Volta, Thomas Alva Edison, and Nikola Tesla. Today, electrical energy is essential because flipping a switch turns on lights, runs fans, powers kitchen mixers and grinders, charges mobile phones, and keeps industrial machinery operating. Furthermore, electrical energy can be converted into many other useful forms, including light energy, sound energy, heat energy, and mechanical energy.

Thermal power plants

A thermal power station is a production facility where thermal energy is converted into electrical energy. Inside these stations, fuel sources such as diesel or gaseous substances are burned thoroughly to release power. The intense heat energy generated by burning these fuels is captured and converted into electrical energy. This electrical energy is then sent through supply systems to power homes, appliances, and industrial machines.

Hydro and wind power plants

• Hydro power stations generate electrical energy by allowing water to flow very rapidly.
• The rapid movement of the flowing water creates a large amount of kinetic energy.
• This kinetic energy from the water is then converted directly into electrical energy.
• Wind farms place massive windmills in open locations where the wind blows strongly and fast.
• The kinetic energy of the moving air spins the windmills, and this motion is converted into electrical energy.

Nuclear power plants

• Every atom contains a central core called a nucleus, which rests at a specific energy level.
• In a nuclear power station, specific atoms are used to release the nuclear energy held inside the nucleus.
• The released nuclear energy is first converted into heat energy.
• That heat energy is subsequently converted into electrical energy for general distribution.
• In Tamil Nadu, functioning nuclear power stations are established at Kalpakkam in Kanchipuram district and at Kudankulam in Tirunelveli district.