Electrical Sciences Voltage Production

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Author:
ereim
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29413
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Electrical Sciences Voltage Production
Updated:
2010-08-11 11:20:13
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Voltage Production
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Voltage Production Defs Only
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  1. Bismuth, antimony, copper, zinc, mercury, gold, silver. Have a relative permeability of less than one
    Diamagnetic materials
  2. Certain areas on an atom that are aligned such that their electrons tend to spin in the same direction
    Domains
  3. The process of combining metals and chemicals to produce electrical energy.
    Electrochemistry
  4. The magnitude of the induced voltage depends on two factors:
    The number of turns in a coil
    How fast the conductor cuts across the magnetic lines or force, or flux
    Faraday’s law of induced voltage
  5. Iron, steel, nickel, cobalt, alnico and peralloy. Nonmagnetic but have the ferromagnetic properties of iron. Made of ceramic material and have relative permeabilities that range from 50 to 200. commonly used in the coils for RF transformers.
    Ferromagnetic materials
  6. The concentration of the magnetic lines of force depending on the length of the coil.
    Field intensity
  7. A lagging behind. When magnetic flux lags behind the magnetizing force in an iron core
    Hysteresis
  8. The group of magnetic field lines emitted outward from the north pole of a magnet
    Magnetic flux
  9. The amount of magnetic flux per unit area of a section, perpendicular to the direction of flux
    Magnetic flux density
  10. The process of moving a conductor through a magnetic field to produce a potential difference.
    Magnetic induction
  11. The result of electrons spinning on their own axis around the nucleus
    Magnetism
  12. The strength of a magnetic field in a coil of wire
    Magnetomotive force (MMF)
  13. Aluminum, platinum, manganese, chromium. Have a relative permeability of slightly more than one
    Paramagnetic materials
  14. When a light beam strikes the surface of a material, they release their energy and transfer it to the atomic electrons of the material.
    Photoelectric effect
  15. By applying pressure to certain crystals or certain ceramics, electrons can be driven out of orbit in the direction of the force. When the pressure is released, the electrons return to their orbits.
    Piezoelectric
  16. Opposition to the production of magnetic flux in a material
    Reluctance
  17. Electrons removed from the atoms due to friction
    Static electricity
  18. The placing of two electrodes in a vacuum and heating one electrode causing electrons to flow
    Thermionic emission
  19. Application of heat to the junction of two dissimilar metals causing electrons to flow from one to the other
    Thermoelectricity
  20. DESCRIBE the following materials as they relate to permeability, including an example and an approximate permeability ratio:
    a. Ferromagnetic materials
    b. Paramagnetic materials
    c. Diamagnetic materials
    Ferromagnetic Materials: Some of the ferromagnetic materials used are iron, steel, nickel, cobalt, and the commercial alloys, alnico and peralloy. Ferrites are nonmagnetic, but have the ferromagnetic properties of iron. Ferrites are made of ceramic material and have relative permeabilities that range from 50 to 200. They are commonly used in the coils for RF (radio frequency) transformers.

    Paramagnetic Materials: These are materials such as aluminum, platinum, manganese, and chromium. These materials have a relative permeability of slightly more than one.

    • Diamagnetic Materials: These are materials such as bismuth, antimony, copper, zinc, mercury, gold, and silver. These
    • materials have a relative permeability of less than one.
  21. EXPLAIN the cause of hysteresis losses
    Hysteresis is defined as “a lagging behind”. The magnetic flux in an iron core lags behind the magnetizing force. When current in a coil reverses direction thousands of times per second, hysteresis can cause considerable loss of energy.
  22. DESCRIBE Faraday’s Law of Induced Voltage, including factors used in calculation and the calculation.
    The magnitude of the induced voltage depends on two factors: (1) the number of turns of a coil, and (2) how fast the conductor cuts across the magnetic lines of force or flux.
  23. The ability of a material to concentrate magnetic lines of flux.
    Permeability
  24. The current times the number of turns of the coil is expressed in units called
    Ampere Turns

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