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C. F. Du Fay recognized two kinds of electricity, which Benjamin Franklin and Ebenezer Kinnersley of Philadelphia later named positive and negative. Progress quickened after the Leyden jar was invented in 1745 by Pieter van Musschenbroek. The Leyden jar stored static electricity, which could be discharged all at once.
Thomas Edison and Electricity are almost synonymous. He was one of the most prolific inventors in history and was born in Milan, Ohio, on February 11, 1847. With little formal education, Thomas Edison gained experience as a telegraph operator and then went on to invent several electricity inspired ...
In fact, electricity did not begin when Benjamin Franklin flew his kite during a thunderstorm or when light bulbs were installed in houses all around the world. "His observations," says Dr. Stuber, "he communicated, in a series of letters, to his friend Collinson, the first of which is dated March 28, 1747.
Imagine a world without electricity. No computers. No televisions. None of the modern "conveniences" we take for granted. In the late 19th Century electricity was a new marvel. People had known about electricity for many years. Benjamin Franklin first achieved world renown for his experiments with electricity, including work with his famous ...
In 1660, Otto von Guericke invented a crude machine for producing static electricity. It was a ball of sulfur, rotated by a crank with one hand and rubbed with the other. Successors, such as Francis Hauksbee, made improvements that provided experimenters with a ready source of static electricity.
The ampere is a basic unit of electric current, often called an "amp". It is a unit of electrical constant current of one ampere. The ampere is one of several electrical charge units used to measure the electromagnetic force between straight parallel conductors carrying electric current. One ampere ...
This is a way of supplying three times as much electricity along three wires as can be supplied through two, without having to increase the thickness of the wires. It is usually used in industry to drive motors and other devices. three phase electricity is by its very nature a much smoother form of electricity than single-phase or two-phase power.
ALMOST 150 years after photovoltaic cells and wind turbines were invented, they still generate only 7% of the world’s electricity. Yet something remarkable is happening. From being peripheral to the energy system just over a decade ago, they are now growing faster than any other energy source and their falling costs are making them ...
Total harmonic distortion (THD) is critical when evaluating power quality in electrical systems. THD measures the level of distortion in a waveform caused by the presence of harmonics. Harmonics are multiples of the fundamental frequency of the waveform, which can result in a distorted waveform with ...
This device was invented in 1929 by Robert J. Van de Graaff and is used to generate high voltages of static electricity. The generator transfers electrons from a moving belt to a metal sphere, creating a charge imbalance between the two objects.