Transformer

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Electromagnetic induction produces an electromotive force across a conductor which is exposed to time varying magnetic fields. Commonly, transformers are used to increase or decrease the voltages of alternating current in electric power applications.

A varying current in the transformer's primary winding creates a varying magnetic flux in the transformer core and a varying magnetic field impinging on the transformer's secondary winding. This varying magnetic field at the secondary winding induces a varying electromotive force (EMF) or voltage in the secondary winding due to electromagnetic induction. Making use of Faraday's Law (discovered in 1831) in conjunction with high magnetic permeability core properties, transformers can thus be designed to efficiently change AC voltages from one voltage level to another within power networks.

Since the invention of the first constant potential transformer in 1885, transformers have become essential for the transmission, distribution, and utilization of alternating current electrical energy. A wide range of transformer designs are encountered in electronic and electric power applications. Transformers range in size from RF transformers less than a cubic centimeter in volume to units interconnecting the power grid weighing hundreds of tons.

The Last

The Last may refer to:

See also

The Last Knight

The Last Knight is a nonfiction book written by the medievalist Norman Cantor about the "twilight of the middle ages and the birth of the modern era". The book uses John of Gaunt, 1st Duke of Lancaster as the focus around which he describes the medieval English culture of that time (1340-1399).

Cantor writes about some of the great families of the era, including Gaunt's own House of Plantagenet. From the Hundred Years War to Edward, the Black Prince, The Last Knight describes the ideas, people, and situations that John of Gaunt encountered.

Paramount Pictures

Paramount Pictures Corporation (commonly known as Paramount Studios or simply Paramount, and formerly known as Famous Players-Lasky Corporation) is a film studio, television production company and motion picture distributor, consistently ranked as one of the "Big Six" film studios of Hollywood. It is a subsidiary of U.S. media conglomerate Viacom. Paramount is a member of the Motion Picture Association of America (MPAA).

In 2014, Paramount Pictures became the first major Hollywood studio to distribute all of its films in digital-form only.

Paramount is the fifth oldest surviving film studio in the world, and America's oldest running studio, founded in 1912.

History

1911–1920: Early history

Paramount is the fifth oldest surviving film studio in the world after the French studios Gaumont Film Company (1895) and Pathé (1896), followed by the Nordisk Film company (1906), and Universal Studios (1912). It is the last major film studio still headquartered in the Hollywood district of Los Angeles.

Optimus Prime

Optimus Prime (formerly Orion Pax) is a fictional character from the Transformers franchise. Optimus Prime is consistently depicted as having strong moral character, excellent leadership, and sound decision-making skills, and possesses brilliant military tactics, powerful martial arts, and advanced alien weaponry. Optimus Prime has a strong sense of honor and justice, being dedicated to building peaceful and mutually beneficial co-existence with humans, the protection of life and liberty of all sentient species.

As the current Matrix of Leadership bearer, Optimus Prime is the de facto leader of the Autobots, a faction of a transforming species of synthetic intelligence from the planet Cybertron. The Autobots are constantly waging civil war against a rival faction of transforming robots called Decepticons. According to Bob Budiansky, co-writer of the Transformers series, Dennis O'Neil was responsible for his name.

Animated character biography