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In electricity generation, an electric generator is a device that converts mechanical energy to electrical energy. The reverse conversion of electrical energy into mechanical energy is done by a motor; motors and generators have many similarities. A generator forces electrons in the windings to flow through the external electrical circuit. It is somewhat analogous to a water pump, which creates a flow of water but does not create the water inside. The source of mechanical energy may be a reciprocating or turbine steam engine, water falling through a turbine or waterwheel, an internal combustion engine, a wind turbine, a hand crank, compressed air or any other source of mechanical energy
References:

(2010). Electricity Generation. Retrieved April 23, 2010, from http://www.electricityforum.com/electricity-generation.html

Rozenblat, L. (2008). The Electric Generator Guide. Retrieved May 25, 2010 from http://www.generatorguide.net/

Questions:

How is power generated?

What is an Electrical Generator?

what is electricity?

 Electricity is a powerful force of nature. Electricity is everywhere in the universe. Electrical forces hold water, metals, and all other kinds of matter together. You can walk and run because electric signals go through your nerves from your brain to your muscles. The signals tell your muscles where to move. Electricity makes many machines work. Electricity makes bulbs light up and runs motors in saws, fans, hairdryers, and other appliances. The computer you are using works because of electricity.

Electrical Charge

Protons, neutrons and electrons are very different from each other. They have their own properties, or characteristics. One of these properties is called an electrical charge. Protons have what we call a "positive" (+) charge. Electrons have a "negative" (-) charge. Neutrons have no charge, they are neutral. The charge of one proton is equal in strength to the charge of one electron. When the number of protons in an atom equals the number of electrons, the atom itself has no overall charge, it is neutral.
References:

Kurtus, R. (2005). Electric Charge Retrieved April 21, 2010, from http://www.google.com.lb/imgres?imgurl=http://www.school-for-champions.com/science/images/electrical_charges-field_direction.gif&imgrefurl=http://www.school-for-champions.com/science/electrical_charge

Questions:
What does the electric field look like?