Wiktor Wise
The foundation for generating electricity was laid by pioneers like Benjamin Franklin, Volta, Faraday, and Tesla. The fundamental principles of electricity generation were discovered in the 1820s and 1830s by British scientist Michael Faraday, who formulated the laws of electromagnetic induction and demonstrated the generation of electricity through moving magnetic fields. Faraday's disc was inefficient, but it showed the possibility of generating electric power using magnetism. The development of electrical components like the capacitor and resistor played a vital role in turning raw discoveries into usable technology. The first coal-fired steam generators provided low-pressure steam for steam engines driving DC dynamos. In 1867, Werner von Siemens, Charles Wheatstone, and S.A. Varley devised the self-exciting dynamo-electric generator. In 1870, a Belgian inventor, Zenobe Gramme, devised a dynamo that produced a steady DC source well-suited to powering motors.
| Characteristics | Values |
|---|---|
| Pioneers who laid the foundation for generating electricity | Benjamin Franklin, Volta, Faraday, Tesla, Robert Boyle, Thomas Edison |
| Discovery of fundamental principles of electricity generation | 1820s and early 1830s |
| Inventor of the voltaic pile | Not mentioned |
| Discovery of the triboelectric effect | Not mentioned |
| Inventor of the Van de Graaf generator | Not mentioned |
| Inventor of the first steam turbine generator | Sir Charles Parsons |
| Inventor of the first self-exciting dynamo-electric generator | Werner von Siemens, Charles Wheatstone, and S.A. Varley |
| Inventor of the first reliable dynamo design | Charles F. Brush |
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What You'll Learn
Michael Faraday's electromagnetic principles
Michael Faraday was an English chemist and physicist who made significant contributions to the field of electromagnetism and electrochemistry. His work laid the foundation for modern electricity generation and motor technology. Faraday's experiments and discoveries established the concept of the electromagnetic field and demonstrated the relationship between electricity and magnetism.
Faraday's key discoveries include the principles underlying electromagnetic induction, diamagnetism, and electrolysis. In 1831, Faraday conducted a series of experiments using two coils of wire wound around opposite sides of a ring of soft iron. He observed that when a current was passed through the first coil, the iron ring became magnetized, and this induced a current in the second coil. This phenomenon, known as magnetic induction, demonstrated that a changing magnetic field could produce an electric field.
Faraday's work on electromagnetic rotations further demonstrated the use of both electricity and magnetism to generate motion. He discovered that by passing a current through a wire, a magnetic field was created around it, which interacted with the field of a magnet, causing the wire to move in a circular motion. This discovery excited Faraday, and he spent the next decade trying to understand the underlying physics of electromagnetism.
Faraday's experiments also showed that an electric current could be induced by moving a magnet, turning an electromagnet on and off, or moving an electric wire in the Earth's magnetic field. These findings challenged the prevailing idea that induction occurred "at a distance" and instead supported the concept of induction occurring along curved lines of force due to the action of contiguous particles.
Faraday's work on electromagnetic induction was later summarised and modelled mathematically by James Clerk Maxwell, who deeply admired Faraday's work. Maxwell's equations, including Faraday's law, have become the basis of all modern theories of electromagnetic phenomena. Faraday's discoveries and principles continue to be foundational in the field of electricity and have had a lasting impact on modern power generation and motor technology.
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![Historic Framed Print, [Sketch by Michael Faraday, in his diary, of an electric generator], 17-7/8" x 21-7/8"](https://m.media-amazon.com/images/I/4101jDYCdVL._AC_UY218_.jpg)
Benjamin Franklin's work in 1752
Benjamin Franklin is known for his work in electricity, specifically his experiments from 1746 to 1752 that changed people's understanding of the phenomenon. In 1752, Franklin organized the Philadelphia Contributionship, the Colonies' first homeowner's insurance company. However, his most notable work from that year was his famous kite experiment.
On a stormy afternoon in June 1752, Benjamin Franklin decided to fly a kite in Philadelphia, Pennsylvania. He had been waiting for a thunderstorm to demonstrate the electrical nature of lightning. Franklin's experiment aimed to prove that lightning is electricity by flying a kite in a storm. He used the kite to collect some electric charge from a storm cloud, showing that lightning was electrical. This experiment did not involve him being struck by lightning, as is often depicted in popular literature, as that would have been dangerous. Instead, he stood on an insulator and stayed dry under a roof to avoid the risk of electric shock.
Franklin's experiment with the kite and the Leyden jar allowed him to "collect electric fire very copiously". This "electric fire", or electricity, could then be discharged at a later time. He described the experiment in his newspaper, the Pennsylvania Gazette, on October 19, 1752, without mentioning that he had performed it himself. This account was later read to the Royal Society and printed in the Philosophical Transactions.
Franklin's work in electricity laid the foundation for modern inventions, including the smartphone. His research has also influenced modern technology, with lightning rods being installed on buildings such as the Academy of Philadelphia (now the University of Pennsylvania) and the Pennsylvania State House (now Independence Hall) in 1752.
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Thomas Edison's electric utility
The foundation of our modern understanding of electricity was laid by pioneers like Franklin, Volta, Faraday, and Tesla. The development of electrical components like the capacitor and resistor played a vital role in turning raw discoveries into usable technology.
Thomas Edison was an American inventor and businessman who contributed significantly to the field of electric power generation. He established the first industrial research laboratory and developed many devices in fields such as electric power generation, mass communication, sound recording, and motion pictures.
Edison's company, the Edison Manufacturing Company, was tasked with installing electric lights at the Pan-American Exposition in Buffalo, New York, in 1901. He had previously devised a commercially viable electric light bulb in 1879 and founded the Edison Illuminating Company on December 17, 1880, to construct electrical generating stations, initially in New York City. The company established the first investor-owned electric utility.
On September 4, 1882, Edison's 600 kW cogeneration steam-powered generating station, the Pearl Street Station, began distributing electrical power in New York City, providing 110 volts of direct current (DC) to 59 customers in lower Manhattan. The customer base quickly expanded to 508, with 10,164 lamps. The Pearl Street Station was the first commercial power plant in the United States and the world's first cogeneration plant.
Edison's work in electricity generation and distribution laid the groundwork for the establishment of numerous other local illuminating companies in the United States during the 1880s. He opened plants in Sunbury, Pennsylvania (1883); Brockton, Massachusetts (1883); Mount Carmel, Pennsylvania (1883); Fall River, Massachusetts (1883); Cumberland, Maryland (1884); Tamaqua, Pennsylvania (1885); and Boston (1886).
In recognition of his contributions, Edison received numerous awards, including the Franklin Medal from The Franklin Institute in 1915 and the Navy Distinguished Service Medal from the United States Navy department in 1920. The American Institute of Electrical Engineers created the Edison Medal in 1923, with Edison as its first recipient.
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Voltaic pile and the electrical battery
The foundation of our modern understanding of electricity was laid by pioneers like Franklin, Volta, Faraday, and Tesla. One of the key inventions that helped us understand electricity was the voltaic pile, invented by Italian physicist and chemist Alessandro Volta in 1800. The voltaic pile was the first electrical battery that could continuously provide an electric current to a circuit.
The invention of the voltaic pile can be traced back to a disagreement between Volta and his fellow Italian scientist Luigi Galvani, who conducted experiments on frogs' legs. Volta disagreed with Galvani's theory and began his own experiments with animal electricity. By 1800, he had introduced the voltaic pile, which he described in a letter to Sir Joseph Banks of the London Royal Society. In his letter, he wrote:
> The apparatus to which I allude, and which will, no doubt, astonish you, is only the assemblage of a number of good conductors of different kinds arranged in a certain matter.
The voltaic pile consisted of several pairs of alternating copper (or silver) and zinc discs (electrodes) stacked together, separated by cloth or cardboard soaked in brine. This increased the total electromotive force, and when the top and bottom contacts were connected by a wire, an electric current flowed through the voltaic pile and the connecting wire. This was the first "true" battery, and it gave off a continuous charge.
The use of the voltaic pile enabled a rapid series of other discoveries, including the electrical decomposition (electrolysis) of water into oxygen and hydrogen by William Nicholson and Anthony Carlisle in 1800. Humphry Davy showed that the electromotive force, which drives the electric current through a circuit containing a single voltaic cell, was caused by a chemical reaction, not by the voltage difference between the two metals. He also used the voltaic pile to decompose chemicals and produce new ones.
The voltaic pile played a crucial role in shaping the development of electrical technology and our understanding of electricity. It served as a precursor to modern electrical batteries, and batteries related to Volta's design powered the entire 19th-century electrical industry until the advent of the dynamo (the electrical generator) in the 1870s.
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Zenobe Gramme's DC source
The foundation of our modern understanding of electricity was laid over centuries by pioneers like Franklin, Volta, Faraday, and Tesla. The development of electrical components like the capacitor and resistor played a vital role in turning raw discoveries into usable technology.
Zenobe Theophile Gramme, a Belgian electrical engineer, invented the first successful direct-current (DC) dynamo. His dynamo, or generator, produced much higher voltages than earlier designs and was the first electric generator to be used commercially. Gramme replaced the toothed-ring armature of earlier designs with a uniform ring-wound armature that came to be known as the "Gramme ring."
In 1873, Gramme and his associate Hippolyte Fontaine accidentally discovered that the device was reversible and would spin when connected to any DC power supply. The Gramme machine was the first electrical motor capable of delivering useful power that was successful industrially. Before Gramme's invention, electric motors attained only low power and were primarily used as toys or laboratory curiosities.
Gramme's DC dynamo attracted great attention at the 1876 Centennial Exhibition in Philadelphia and quickly became a commercial success. In 1871, Gramme and Fontaine opened a factory that manufactured electrical devices and set the standards for the industry. The factory produced the Gramme dynamo, Gramme ring, Gramme armature, and other devices. In recognition of his contributions, Gramme was inducted into the National Inventors Hall of Fame and was made an officer of the National Order of the Legion of Honour in 1877.
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Frequently asked questions
American polymath Benjamin Franklin is most credited with discovering electricity in 1752.
Pioneers like Volta, Faraday, and Tesla also laid the foundation for our modern understanding of electricity. Faraday formulated the laws of electromagnetic induction and demonstrated the generation of electricity through moving magnetic fields.
The fundamental principles of electricity generation were discovered in the 1820s and 1830s. The voltaic pile, an ancestor of the electrical battery, was invented in the 18th century and provided a viable source of electricity. The triboelectric effect, which can lift light objects and generate sparks, was another early method, but it was extremely inefficient.
