Electricity And Its Origins
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
Some countries, for example, Denmark have issued a new legislation restricting the use of electric heating in new buildings, if allowed at all. Electricity is an extremely helpful source for refrigeration. As the demand for air conditioning increases so does the overall electricity demand which electricity utilities will have to cater for.
Electricity is of course used in telecommunication. The electrical telegraph was one of the earliest applications that electricity was used for, commercially demonstrated by Crooke and Wheatstone in 1837.
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.
Electromagnetism is best seen in an electric motor, one of the cleanest sources of motive power. A stationary motor like a winch can easily be powered by a stationary external power source, but a moving motor like that of an electric vehicle must carry a power source with it, unless it works using a pantograph like some modern trains.
The transistor is undoubtedly one of the most important breakthrough inventions of the 1900s. All modern electrical circuits use one to direct the right amount of electricity flow to the right application. Several billion tiny transistors can fit into only a few centimetres.
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