Eletricity and it's application is one of the greatest invention of science and technology. Electricity is useful in every aspect of life.
With the invention of electricity scientist can carry out experiments , Industries can manufacture goods, Hospitals can save lives,
Computers are used in offices to achieve quick results, refrigerators are used to chill drinks and preserve food, cybercafes are open to create employment, people watch television's programs to relax.
How is electric power transmitted. Electricity flow through conductors and power is transmitted in either low frequency or high frequency.
Cables are used in low frequency to carry alternative current. The conductors are connected to a source of electricity such as battery.
The equipment for low frequency power transmission are sockets and generators.
When electric power is needed for transmitting messages over long distances, high frequency is required.
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