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         Electromagnetism:     more books (100)
  1. Physics Problems for Programmable Calculators: Mechanics and Electromagnetism by Richard Cristman, 1981-03
  2. Electromagnetic Compatibility in Power Systems (Elsevier Series in Electromagnetism)
  3. A Popular Sketch Of Electromagnetism Or Electrodynamics: And Outlines Of The Parent Sciences Of Electricity And Magnetism (1856) by Francis Watkins, 2010-05-22
  4. Electromagnetism: Webster's Timeline History, 1791 - 2007 by Icon Group International, 2009-07-08
  5. Elements of Electricity, Magnetism, and Electro-Magnetism: Embracing the Late Discoveries and Improvements, Digested Into the Form of a Treatise, Being ... for the Use of the Students of the Universi by Jean-Baptiste Biot, 2010-01-12
  6. An Introduction to Applied Electromagnetism (Wiley Student Series in Electronic and Electrical Engineering) by Christos Christopoulos, 1990-10
  7. Theoretical Physics: Thermodynamics, Electromagnetism, Waves, and Particles by f constant, 1961
  8. Outlines of the Theory of Electromagnetism a Ser by Gilbert T. Walker, 1910
  9. Outlines Of The Theory Of Electromagnetism: A Series Of Lectures Delivered Before The Calcutta University (1910) by Gilbert T. Walker, 2010-09-10
  10. Magnetic Fields of Force: An Exposition of the Phenomena of Magnetism, Electro-Magnetism, and Induction Based On the Conception of Lines of Force, Part 1 by Hermann Ebert, Charles Vandeleur Burton, 2010-04-22
  11. Elements of Electricity, Magnetism, and Electro-Magnetism by John Farrar, 2009-12-22
  12. Electro-Magnetism: History Of Davenport's Invention Of The Application Of Electro-Magnetism To Machinery (1837) by Benjamin Silliman, 2010-05-22
  13. Treatises On Electricity, Galvanism, Magnetism, and Electro-Magnetism by Peter Mark Roget, 2010-01-11
  14. Theory of Electromagnetism (Pure & Applied Mathematics Monograph) by D.S. Jones, 1964-12

81. Molecular Expressions: Electricity And Magnetism - Generators And Motors
This section of the Electricity and Magnetism Primer provides a thorough discussion of generators and motors. It contains several Interactive Java Tutorials
http://micro.magnet.fsu.edu/electromag/electricity/generators/index.html

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Generators and Motors
Basic Magnetic Field Magnets are pieces of metal that have the ability to attract other metals. Every magnet has two poles: a north and a south. Much like electrical charges, two similar magnetic poles repel each other; while opposite magnetic poles attract each other. Magnets have a continuous force around them that is known as a magnetic field. This field enables them to attract other metals. Figure 1 illustrates this force using bar and horseshoe magnets. The shape of the magnet dictates the path the lines of force will take. Notice that the force in Figure 1 is made up of several lines traveling in a specific direction. It can be concluded that the lines travel from the magnet's north pole to its south. These lines of force are often called the magnetic flux. If the bar magnet is now bent to form a horseshoe magnet, the north and south pole are now across from each other. Notice in the horseshoe magnet how the lines of force are now straight, and that they travel from the north pole to the south. It will be revealed how generators and motors use these lines of force to generate electricity, as well as mechanical motion. Magnetic Fields Around Conductors When a current flows through a conductor, a magnetic field surrounds the conductor. As current flow increases, so does the number of lines of force in the magnetic field (Figure 2).

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