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E003B current effects

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  • 1. UEENEEE003B
    Solve Problems in Single Path DC Circuits
    Effects of Current Flow
  • 2. When current flows
    These two effects are always present:
    heating
    magnetic
    These effects may be present:
    chemical
    physiological
    8/9/2011
    Revision02
    2
  • 3. Lets talk about:
    cable size / insulation
    the cooling vanes on electric motors
    the fan on electric motors
    transformer cooling
    power station cooling
    electric soldering iron
    stoves
    8/9/2011
    Revision02
    3
    HEATING
  • 4. Magnetic
    A magnetic field is produced in a straight conductor, when current flows.
    If the conductor is made into a coil an electromagnetic is formed.
    By controlling the current we can control the direction and strength of the magnetic field.
    Lets talk about:
    scrap metal handling
    solenoids
    motors
    power station, alternator field winding
    8/9/2011
    Revision02
    4
  • 5. Limited
    batteries
    refining metals
    8/9/2011
    Revision02
    5
    Chemical
  • 6. 3 DIFFERENT EFFECTS
    Respiratory
    Asphyxia (can’t breathe)
    Ventricular Fibrillation (Heart stops pumping blood)
    8/9/2011
    Revision02
    6
    Physiological
  • 7. 8/9/2011
    Revision02
    7
  • 8. 8/9/2011
    Revision02
    8
  • 9. 8/9/2011
    Revision02
    9
  • 10.
    • Respiratory
    • 11. current through the brain, It stops controlling the heart. (not common)
    Asphyxia
    0 to 10mA Pain
    10 to 25mA Arm muscles contract
    30mA plus The chest muscles contract
    8/9/2011
    Revision02
    10
    Different effects
  • 12. 8/9/2011
    Revision02
    11

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