A few days ago
underworld

im doing some howe work and i need some facts about ….1st good answer gets best answet?

electricity any ideas please

Top 8 Answers
A few days ago
Anonymous

Favorite Answer

These are some sites that you can collect information about electricity : –
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A few days ago
Anonymous
if you understand how atoms work…electricity is a stream of electrons moving through matter…jumping from atom to atom…it uses magnetism to catylize the movement the movement usually makes a circular path (for electronics) or the path can be liniar like a bolt of lightning…but scientists still don’t completely understand magnetism…so we still don’t completely understand electricity either
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A few days ago
one Life to live
Did Edison invent the light bulb, Marconi the radio, Bell the telephone, Morse the telegraph? The answers are no. They didn’t invent the wheel. They were instrumental in making it better and, in some cases, obtaining the patent.

Electrical history goes back before Christ and brings us to the computer age. Along this journey you will discover it took several people, along the way, to make the light bulb glow.

The journey won’t end with this book, as we are constantly discovering new inventions that will someday even take us to the stars.

Benjamin Franklin (1706-1790)

His kite experiment demonstrated that lightning is electricity. He was the first to use the terms positive and negative charge.

Franklin was one of seventeen children. He quit school at age ten to become a printer. His life is the classic story of a self-made man achieving wealth and fame through determination and intelligence.

James Watt (1736-1819) was born in Scotland. Although he conducted no electrical experiments, he must not be overlooked. He was an instrument maker by trade and set up a repair shop in Glasgow in 1757. Watt thought that the steam engine would replace animal power, where the number of horses replaced seemed an obvious way to measure the charge for performance. Interestingly, Watt measured the rate of work exerted by a horse drawing rubbish up an old mine shaft and found it amounted to about 22,000 ft-lbs per minute. He added a margin of 50% arriving at 33,000 ft-lbs.

William Thomson, Lord Kelvin (1824-1907) was best known in his invention of a new temperature scale based on the concept of an absolute zero of temperature at -273°C (-460°F). To the end of his life, Thomson maintained fierce opposition to the idea that energy emitted by radioactivity came from within the atom. One of the greatest scientific discoveries of the 19th century, Thomson died opposing one of the most vital innovations in the history of science.

Thomas Seebeck (1770-1831) a German physicist was the discover of the “Seebeck effect”.

He twisted two wires made of different metals and heated a junction where the two wires met. He produced a small current. The current is the result of a flow of heat from the hot to the cold junction. This is called thermoelectricity. Thermo is a Greek word meaning heat.

Michael Faraday (1791-1867) an Englishman, made one of the most significant discoveries in the history of electricity: Electromagnetic induction. His pioneering work dealt with how electric currents work. Many inventions would come from his experiments, but they would come fifty to one hundred years later.

Failures never discouraged Faraday. He would say; “the failures are just as important as the successes.” He felt failures also teach. The farad, the unit of capacitance is named in the honor of Michael Faraday.

James Maxwell (1831-1879) a Scottish mathematician translated Faraday’s theories into mathematical expressions. Maxwell was one of the finest mathematicians in history. A maxwell is the electromagnetic unit of magnetic flux, named in his honor.

Today he is widely regarded as secondary only to Isaac Newton and Albert Einstein in the world of science.

Thomas Alva Edison (1847-1931) was one of the most well known inventors of all time with 1093 patents. Self-educated, Edison was interested in chemistry and electronics.During the whole of his life, Edison received only three months of formal schooling, and was dismissed from school as being retarded, though in fact a childhood attack of scarlet fever had left him partially deaf.

Nikola Tesla was born of Serbian parents July 10, 1856 and died a broke and lonely man in New York City January 7, 1943. He envisioned a world without poles and power lines. Referred to as the greatest inventive genius of all time. Tesla’s system triumphed to make possible the first large-scale harnessing of Niagara Falls with the first hydroelectric plant in the United States in 1886.

October 1893 George Westinghouse (1846-1914)was awarded the contract to build the first generators at Niagara Falls. He used his money to buy up patents in the electric field. One of the inventions he bought was the transformer from William Stanley. Westinghouse invented the air brake system to stop trains, the first of more than one hundred patents he would receive in this area alone. He soon founded the Westinghouse Air Brake Company in 1869.

Alexander Graham Bell (1847-1922) born in Scotland, was raised in a family that was interested and involved in the science of sound. Bell’s father and grandfather both taught speech to the deaf. A unit of sound level is called a bel in his honor. Sound levels are measured in tenths of a bel, or decibels. The abbreviation for decibel is dB.

Heinrich Hertz (1857-1894) a German physicist, laid the ground work for the vacuum tube. He laid the foundation for the future development of radio, telephone, telegraph, and even television. He was one of the first people to demonstrate the existence of electric waves. Hertz was convinced that there were electromagnetic waves in space.

Otto Hahn (1879-1968), a German chemist and physicist, made the vital discovery which led to the first nuclear reactor. He uncovered the process of nuclear fission by which nuclei of atoms of heavy elements can break into smaller nuclei, in the process releasing large quantities of energy. Hahn was awarded the Nobel prize for chemistry in 1944.

Albert Einstein (1879-1955). Einstein’s formula proved that one gram of mass can be converted into a torrential amount of energy. To do this, the activity of the atoms has to occur in the nucleus. E = energy, M = mass, and C = the speed of light which is 186,000 miles per second. When you square 186,000 you can see it would only take a small amount of mass to produce a huge amount of energy.

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A few days ago
Indeedy
If you put electricity through a coil of wire, it causes the coil to become magnetic.
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A few days ago
Anonymous
what do you want to now about elcetricity? how it works? how to make a light bulb glow? well, if you have a BIG battery, and a small light bulb, conect one copper wire on each side of the battery touching the bottem of the light bulb, it lights up
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A few days ago
Anonymous
electricity is meausserd in watts and is dangerous
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A few days ago
Misai
visit this page

http://en.wikipedia.org/wiki/Electricity

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A few days ago
MakeMyDay
History of electricity

Main articles: History of electricity and Etymology of electricity

Static electricity produced by rubbing objects against fur was known to the ancient Greeks, Phoenicians, Parthians and Mesopotamians. Some propose that the Parthians and Mesopotamians may have had some knowledge of electroplating, based on the discovery of the Baghdad Battery, which resembles a galvanic cell.

In 1600 the English scientist William Gilbert first used the New Latin word electricus (“of amber” or “like amber”, from ηλεκτρον [elektron], the Greek word for “amber”) to refer to the property of attracting small objects after being rubbed. This soon gave rise to the English words “electric” and “electricity”, in Sir Thomas Browne’s Pseudodoxia Epidemica of 1646.

Further work was conducted by Otto von Guericke , Robert Boyle, Stephen Gray and C. F. du Fay. In the 18th century, Benjamin Franklin conducted extensive research in electricity. He had theories on the relationship between lightning and static electricity, including his famous kite-flying experiment,which was a key attached to a wet string and kite. During a lightning storm a small spark struck his finger showing that lightning is electricity. It sparked the interest of later scientists whose work provided the basis for modern electrical technology. Most notably these include Luigi Galvani (1737–1798), Alessandro Volta (1745-1827), Michael Faraday (1791–1867), André-Marie Ampère (1775–1836), and Georg Simon Ohm (1789-1854).

The late 19th and early 20th century produced such giants of electrical engineering as Nikola Tesla, Antonio Meucci, Thomas Edison, George Westinghouse, Werner von Siemens, Charles Steinmetz, Alexander Graham Bell and William Thomson, 1st Baron Kelvin.

Franklin Kite Plaque

[edit] Electric potential

Main article: Electric potential

The electric potential difference between two points is defined as the work done (against electrical forces) per unit of charge in moving a positive point charge slowly between two points. If one of the points is taken to be a reference point with zero potential, then the electric potential at any point can be defined in terms of the work done per unit charge in moving a positive point charge from that reference point to the point at which the potential is to be determined. For isolated charges, the reference point is usually taken to be infinity. The potential is measured in volts. (1 volt = 1 joule/coulomb) The electric potential is analogous to temperature : there is a different temperature at every point in space, and the temperature gradient indicates the direction and magnitude of the driving force behind heat flow. Similarly, there is an electric potential at every point in space, and its gradient indicates the direction and magnitude of the driving force behind charge movement.

[edit] Electric current

Main article: Current (electricity)

Nikola TeslaAn electric current is a flow of electric charge, and its intensity is measured in amperes. Examples of electric currents include metallic conduction, where electrons flow through a conductor or conductors such as a metal wire, and electrolysis, where ions (charged atoms) flow through liquids. The particles themselves often move quite slowly, while the electric field that drives them propagates at close to the speed of light. See electrical conduction for more information.

Devices that use charge flow principles in materials are called electronic devices.

A direct current (DC) is a unidirectional flow, while an alternating current (AC) reverses direction repeatedly. The time average of an alternating current is zero, but its energy capability (RMS value) is not zero.

Ohm’s law is an important relationship describing the behaviour of electric currents, relating them to voltage.

For historical reasons, electric current is said to flow from the most positive part of a circuit to the most negative part. The electric current thus defined is called conventional current. It is now known that, depending on the conditions, an electric current can consist of a flow of charged particles in either direction, or even in both directions at once. The positive-to-negative convention is widely used to simplify this situation. If another definition is used – for example, “electron current” – it should be explicitly stated.

[edit] Electric field

Main article: Electric field

Michael FaradayThe concept of electric fields was introduced by Michael Faraday. The electrical field force acts between two charges, in the same way that the gravitational force acts between two masses. However, the electric field is a little bit different. Gravitational force depends on the masses of two bodies, whereas electric force depends on the electric charges of two bodies. While gravity can only pull masses together, the electric force can be an attractive or repulsive force. If both charges are of same sign (e.g. both positive), there will be a repulsive force between the two. If the charges are opposite, there will be an attractive force between the two bodies. The magnitude of the force varies inversely with the square of the distance between the two bodies, and is also proportional to the product of the unsigned magnitudes of the two charges.

[edit] Electric charge

Main article: Electric charge

Electric charge is a property of certain subatomic particles (e.g., electrons and protons) which interacts with electromagnetic fields and causes attractive and repulsive forces between them. Electric charge is a fundamental conserved property of matter and can be precisely quantified. It couples to the electromagnetic field, one of the four fundamental forces of nature.

In this sense, the phrase “quantity of electricity” is used interchangeably with the phrases “charge of electricity” and “quantity of charge”. There is fundamentally only one type of electric charge, and only one variable is needed to keep track of the amount of charge.[1] The amount of charge may be positive or negative. Through experimentation, we find that like-charged objects repel and opposite-charged objects attract one another. The magnitude of the force of attraction or repulsion is given by Coulomb’s law.

Electricity (from New Latin ēlectricus, “amberlike”) is a general term for a variety of phenomena resulting from the presence and flow of electric charge. This includes many well-known physical phenomena such as lightning , electromagnetic fields and electric currents, and is put to use in industrial applications such as electronics and electric power . These related, but distinct, concepts are better identified by more precise terms:

Electric field — an effect produced by an electrically charged object that exerts a force on other charged objects in its vicinity.

Electric potential — the capacity of an electric field to do work, typically measured in volts (V).

Electric current — a movement or flow of electrically charged particles, typically measured in amperes (A).

Electrical energy — the energy made available by the flow of electric charge through an electrical conductor.

Electric power — the rate at which electric energy is converted to or from another energy form, such as light, heat, or mechanical energy.

Electric charge — a connection conserved property of some subatomic particles, which determines their electromagnetic interactions. Electrically charged matter is influenced by, and produces, electromagnetic fields.

Electromagnetism — a fundamental interaction

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