Saturday, August 8, 2009

The Importance Of Electricity In Modern Times

By Shaun Ivan McDonald

Over the last 200 years, electricity has become an essential part of most aspects of modern life. One of the first successful, publicly available applications of electricity was the early incandescent light bulb.

The introduction of electricity to society has introduced some new household hazards; however it did eradicate some of the old ones like the naked flames of the gas lighting that was widely used up until that point.

The Joule heating effect that can be found in light bulbs is also present in electric heating. Electric heating has been thought of as wasteful in the past because in order to create that heat energy, heat has already been used in the power stations

Denmark (among a few other countries) has issued a new law restricting electric heating use in new buildings, if allowed at all. As well as heating, electricity provides a hugely beneficial source of refrigeration. As temperatures get hotter, the demand for air conditioning gets higher, increasing the amount of energy used, and so climate change is increasing in a snowball effect.

Another area that depends on electricity to function is telecommunication. The electric telegraph was in fact one of the first ways in which electricity was used successfully.

In the 1860s, global communication was made a possibility with telegraph systems going intercontinental, then transatlantic. Fibre optic technology and satellites have now taken a large chunk of the communications market but electricity still powers every communications application we have available to us.

You can visibly see electromagnetism best in an electric motor, which is one of the best providers of clean, motive power. A motor that doesn't move, like that of a winch, can easily be powered by an external source, but an electric motor that needs to move with its application, like an electric scooter, must carry a power supply such as a battery along with it, unless it uses a pantograph like cable cars.

Perhaps the most important invention of the 1900s is the transistor. It is a vital part of all modern electrical circuits and a modern integrated circuit may contain several billion miniaturised transistors in a region of only a few centimetres squared.

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