What did Michael Faraday discover?
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he discovered the capacitor and defined capacitance.\nhe gave the formula.\nCHARGE(Q)=C(capactiance)* voltage(v)\nthe unit for measuring capacitance of a capacitor is FARAD.\ncapacitor is a linear component that stores charge.\nit consist of two metal plates separated by a dielectric material eg->glass,mica,fibre..etc,\n\ncapacitance of a capacitor is 1 farad if it can store a charge of  1 coloumb when i volt of current flows through it.
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Carl Wilhelm Scheele discovered it in 1772, and Joseph Priestly found it in 1774 (independently).  Scheele was a Swede, Priestly was an Englishman.
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Well, rainbows (which are a spectrum) have been known for ages and ages. That crystals will produce rainbows has also been known for ages. Newton was the first person to seriously investigate the properties of light using prisms. The discovery of spectral *lines* was later, but I'm not sure by whom. But it was mostly done by the late 1800's. As a point of interest, Helium was first discovered through the spectrum of sunlight and only later found on earth.
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In 1928, bacteriologist Alexander Fleming made a chance discovery from an already discarded, contaminated Petri dish. The mold that had contaminated the experiment turned out to contain a powerful antibiotic, penicillin.\n\nRadium was discovered in 1898 by French physicist and Nobel laureate Marie Curie in pitchblende (a uranium and radium-bearing mineral).
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http://en.wikipedia.org/wiki/Discovery_of_america\nNothing is known for absolute certain, but there are lots of theories
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Michael Farday invented electricity as we know it.\nAs a sidenote If Benny Franklin was  a creator of anything it was the lightning rod and the grounding priciple.\nFor centuries electricity has been a challenge to scientists. They have long known that it exists, and have discovered how to generate it on a large scale, but find it difficult to explain exactly what electricity is.\n\nWhere did it all begin?\n\nAround 600 BC Greeks found that by rubbing an 'electron' (a hard Fossilised resin that today is known as Amber) against a fur cloth, it would attract particles of straw. This strange effect remained a mystery for over 2000 years, until, around AD 1600, Dr William Gilbert investigated the reactions of amber and magnets and first recorded the word 'Electric' in a report on the theory of magnetism.\n\nGilbert's experiments led to a number of investigations by many pioneers in the development of electricity technology over the next 350 years.\n\nBenjamin Franklin(in his own words)\n Franklin was an American writer, publisher, scientist and diplomat, who helped to draw up the famous Declaration of Independence and the US Constitution. In 1752 Franklin proved that lightning and the spark from amber were one and the same thing. The story of this famous milestone is a familiar one, in which Franklin fastened an iron spike to a silken kite, which he flew during a thunderstorm, while holding the end of the kite string by an iron key. When lightening flashed, a tiny spark jumped from the key to his wrist. The experiment proved Franklin's theory, but was extremely dangerous - He could easily have been killed.\n\nGalvani and Volta\n In 1786, Luigi Galvani, an Italian professor of medicine, found that when the leg of a dead frog was touched by a metal knife, the leg twitched violently. Galvani thought that the muscles of the frog must contain electricity. By 1792 another Italian scientist, Alessandro Volta, disagreed: he realised that the main factors in Galvani's discovery were the two different metals - the steel knife and the tin plate - apon which the frog was lying. Volta showed that when moisture comes between two different metals, electricity is created. This led him to invent the first electric battery, the voltaic pile, which he made from thin sheets of copper and zinc separated by moist pasteboard.\n\nIn this way, a new kind of electricity was discovered, electricity that flowed steadily like a current of water instead of discharging itself in a single spark or shock. Volta showed that electricity could be made to travel from one place to another by wire, thereby making an important contribution to the science of electricity. The unit of electrical potential, the Volt, is named after Volta.\n\nMichael Faraday\n The credit for generating electric current on a practical scale goes to the famous English scientist, Michael Faraday. Faraday was greatly interested in the invention of the electromagnet, but his brilliant mind took earlier experiments still further. If electricity could produce magnetism, why couldn't magnetism produce electricity.\n\nIn 1831, Faraday found the solution. Electricity could be produced through magnetism by motion. He discovered that when a magnet was moved inside a coil of copper wire, a tiny electric current flows through the wire. Of course, by today's standards, Faraday's electric dynamo or electric generator was crude, and provided only a small electric current be he discovered the first method of generating electricity by means of motion in a magnetic field.\nThomas Edison and Joseph Swan\n Nearly 40 years went by before a really practical DC (Direct Current) generator was built by Thomas Edison in America. Edison's many inventions included the phonograph and an improved printing telegraph. In 1878 Joseph Swan, a British scientist, invented the incandescent filament lamp and within twelve months Edison made a similar discovery in America.\n\nSwan and Edi
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The Invention of the Light Bulb: Davy, Swan and Edison\n\nThe first electric light was made in 1800 by Humphry Davy, an English scientist. He experimented with electricity and invented an electric battery. When he connected wires to his battery and a piece of carbon, the carbon glowed, producing light. This is called an electric arc. \nMuch later, in 1860, the English physicist Sir Joseph Wilson Swan (1828-1914) was determined to devise a practical, long-lasting electric light. He found that a carbon paper filament worked well, but burned up quickly. In 1878, he demonstrated his new electric lamps in Newcastle, England. \n\nIn 1877, the American Charles Francis Brush manufactured some carbon arcs to light a public square in Cleveland, Ohio, USA. These arcs were used on a few streets, in a few large office buildings, and even some stores. Electric lights were only used by a few people. \n\nThe inventor Thomas Alva Edison (in the USA) experimented with thousands of different filaments to find just the right materials to glow well and be long-lasting. In 1879, Edison discovered that a carbon filament in an oxygen-free bulb glowed but did not burn up for 40 hours. Edison eventually produced a bulb that could glow for over 1500 hours.
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His name was Alessandro Volta.  Alessandro Volta discovered the first practical method of generating electricity.  In 1800, he arranged zinc and copper discs in a column and invented the battery.  His most famous invention was the voltic pile. \n\nThese links should give you all the good stuff!
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TESLA IS THE UNIT FOR MAGNETIC INDUCTION,HE GAVE A LOT OF THEORIES ON  THE ABOVE TOPIC
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newton discovered it.but Einstein proved it is not.one day he photograph the stars continuously at one photograph it's slightly move in zig zag.
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That is so cool!!\n\nHow did u find it?
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Nope. Ben just got it wrong.\n\nWhen he came up with "positive" and "negative" he wasn't even thinking in terms of current they way we do today. Frankline did have an "fluid theory" of electricity, but it was much different in scope with anything we would think of. It was not until 1897 that the electron was discovered.\n\nSo, Ben, can be forgiven. When he was working he wrote in a letter that "I feel a Want of Terms here and doubt much whether I shall be able to make this intelligible," and he supposed to have come up with a variety of terms in use today:     \n\n    * battery\n    * charge\n    * condensor\n    * conductor\n    * plus\n    * minus\n    * positively\n    * negatively\n    * armature\n\nUsing a positve flow is useful in that it keeps a lot of the quantities positive. (Though I confess, in Physics grad school we always used the electrons moving bit.)\n\nAlso moving protons are good if one wants to use special relativity to show that electricy and magnetism are the same.
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Exploration and discovery
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I love this type of science - this is the only science that I know _-- Earth Science!\n\nIn 1963, Fred Vine, Drummond Matthews, and others found that the crust surrounding the midocean ridges showed alternating bands -- each band magnetized with a polarity opposite the surrounding bands. They suggested that as new sea-floor crust was formed around the rift in the midocean ridge, it magnetized differently, depending upon the polarity of the planet at that time. This supported the theory that Harry Hess had put forth, that the ocean progressivley widens as new sea floor is created along a crack that follows the crest of midocean ridges.\n\nIn 1966, earth scientists first identified the Jaramillo Event, the wholesale reversal of Earth's magnetic fields some 900,000 years ago. This confirmed the theory that Earth's magnetic field had flip-flopped through the planet's life, and it made Matthews and Vine's 1963 finding quite clear. They realized that the pattern of reversals matched perfectly the magnetic profile they had compiled of the sea floor. This discovery, together with data from a 1964 research vessel, transformed the field of geology. It confirmed sea-floor spreading as hypothesized by Hess, and thus "continental drift," originally proposed by Alfred Wegener back in 1912. It convinced many that plate tectonics was the best theory to unify nearly all the previously accumulated, but disjoint geological data.
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I think the truest indication of Newton's genius was his discovery (not exactly intuitive) that the same force that causes an object to fall to the ground was none other than the same force that keeps the moon and planets in their orbits.
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This was an experimemt the US Navy conducted.  They attempted to "Cloak" a destroyer using magnetism.  How successful it was I am not sure.  There are several myths surrounding the experiment which depict gross outcomes of the experiment.
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Philo T. Farnsworth \nhttp://www.ideafinder.com/history/inventors/farnsworth.htm