The Importance Of Electricity In Modern Times
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 electric overhaul of society obviously brought many fresh new dangers with it, but it eliminated some of the old ones, like the naked flames of gas lighting that was commonly used in homes and factories then.
The Joule heating effect that is used in light bulbs is also used in electric heating. Electric heating, although easily controllable and versatile, could be deemed wasteful as heat has already been used to create this electricity in power stations.
A few countries, including Denmark have introduced new laws restricting the use of electric heating in new buildings as it is having an adverse affect on climate change. However as the global temperature rises the demand for Air conditioning goes up, and so climate change is getting worse with a snowball effect.
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, electricity had made global communication possible with the first intercontinental telegraph systems (this was of course before the telephone) and then the first transatlantic ones. Since then, satellite communication and optical fibre have taken a share of the communications market, but electricity is sure to remain a vital part of the process.
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.
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. - 21396
The electric overhaul of society obviously brought many fresh new dangers with it, but it eliminated some of the old ones, like the naked flames of gas lighting that was commonly used in homes and factories then.
The Joule heating effect that is used in light bulbs is also used in electric heating. Electric heating, although easily controllable and versatile, could be deemed wasteful as heat has already been used to create this electricity in power stations.
A few countries, including Denmark have introduced new laws restricting the use of electric heating in new buildings as it is having an adverse affect on climate change. However as the global temperature rises the demand for Air conditioning goes up, and so climate change is getting worse with a snowball effect.
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, electricity had made global communication possible with the first intercontinental telegraph systems (this was of course before the telephone) and then the first transatlantic ones. Since then, satellite communication and optical fibre have taken a share of the communications market, but electricity is sure to remain a vital part of the process.
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.
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. - 21396
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