The generators are  useful machines that do a lot of good things. In this composition, I  would like to tell you some information about the generators.Today the generators are made in a wide range of sizes, from very small machines . Generators are for the production of electricity, and produce most of the electricity  that is used by people. Electric generators are essentially very large quantities of copper wire spinning around inside very large magnets, at very high speeds.The generator can be small in size, so that it can be held in one hand. These generators are used in some small scientific equipment to generate enough electricity to move the pointer, and may be the size of a generator is greater than the size of a house, and can provide more than a million electrical power houses. For example: when  my family and I go to the desert we take a lot of things from the house like: TV, Video , Air conditioner , tent and fire.

http://0-www.accessscience.com.library.hct.ac.ae/content.aspx?searchStr=the+generators&id=284800

The generator does not introduce energy, but it converts mechanical energy into electrical energy, and engineers usually refer to it as a mechanical tool, which manages the basic generator engine. In order to get additional electricity from the generator it is essential to make additional mechanical energy.

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



 The dynamo was the first electrical generator capable of delivering

power for industry. The dynamo uses electronic  to

convert mechanical rotation into a pulsing direct

electric current through the use of a commutator. The first dynamo

was built by Hippolyte Pixii in 1832.

Through a series of accidental discoveries, the dynamo became the

source of many later inventions, including the DC electric motor,

the AC alternator, the ACsynchronous motor, and the rotary

converter.

A dynamo machine consists of a stationary structure, which

provides a constant magnetic field, and a set of rotating windings

which turn within that field. On small machines the constant

magnetic field may be provided by one or more permanent magnets;

larger machines have the constant magnetic field provided by one

or more electromagnets, which are usually called field coils.

Large power generation dynamos are now rarely seen due to the

now nearly universal use of alternating current for power

distribution and solid state electronic  power conversion.

But before the principles of  were discovered, very large direct-

current dynamos were the only means of power generation and

distribution. Now power generation dynamos are mostly a curiosity.

http://science.howstuffworks.com/electricity2.htm

This is information about the generator. The device is simple to install but of great interest, and has many important uses ranging from children's games through the household electrical devices.

Bibliography



http://0-www.accessscience.com.library.hct.ac.ae/content.aspx?searchStr=the+generators&id=284800




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




http://science.howstuffworks.com/electricity2.htm