In the years of 1831–1832, Michael Faraday discovered the operating principle of electromagnetic generators. The principle, later called Faraday's Law, is that an electromotive force is generated in an electrical conductor which encircles a varying a magnetic flux. He also built the first electromagnetic generator, called the Faraday Disk, a type of homo polar generator, using acopper disc rotating between the poles of a horseshoe magnet. It produced a small DC voltage. The Hand Cranked Generator is a device that converts mechanical energy to electrical energy. The Hand Cranked Generator helped the economy because it was a first idea and a step forward to electric generators. Electric generators are created 2 years later, which benefited everyone because it helped get electrical energy in a more sufficient way.
The dynamo was the first electrical generator capable of delivering power for industry, and is still the most important generator in use in the 21st century. The dynamo uses electromagnetic principles to convert mechanical rotation into an alternating electric current. It is the most common way to generate electrical energy for bicycle lighting.
The first dynamo based on Faraday's principles was built in 1832 by Hippolyte Pixii, a French instrument maker. It used a permanent magnet which was rotated by a crank. The spinning magnet was positioned so that its north and south poles passed by a piece of iron wrapped with wire. Pixii found that the spinning magnet produced a pulse of current in the wire each time a pole passed the coil. Furthermore, the north and south poles of the magnet induced currents in opposite directions. By adding a commutator, Pixii was able to convert the alternating current to direct current.
Hand crank is work or energy that is produced by cranking the generator for series of time . It can also refer to the power (rate to power per hour). Power comes primarily from muscles, but body power used to transfer or to use this power to do other stuff
Before the connection between magnetism and electricity was discovered, electrostatic generators were used. They operated onelectrostatic principles. Such generators generated very high voltage and low current. They operated by using moving electrically chargedbelts, plates, and disks that carried charge to a high potential electrode. The charge was generated using either of two mechanisms: