Magnets and Electromagnetic Induction

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Magnets and Electromagnetic Induction
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• Similar magnetic poles repel, unlike magnetic
  poles attract.

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Electric Effect

• An electric current flowing in a wire will
  produce a magnetic effect in the space around the
  wire.
• An electric charge in motion produces a magnetic
  field.

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Producing Magnets

• Each atom call act as a tiny magnet.
• If the pattern of individual atoms align, then
  groups of individual atoms will align to produce
  magnet domains.
• A magnet can be formed by aligning magnetic
  domains.

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Electromagnetic Induction

• Just as a moving charge will produce a magnetic
  field, a moving magnetic field will generate a
  current.
• EM Induction is the production of an electric
  current by a moving magnetic field.

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Motors and Generators

• An electric motor is a device that convert
  electric energy to mechanical energy through
  electromagnetic properties.
• An electric generator is a device that convert
  mechanical energy to electric energy through
  electromagnetic properties.

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Electromagnetic Waves

• An accelerated electric charge will generate an
  electromagnetic wave.
• An EM wave consists of alternating electric and
  magnetic fields that move through space.
• EM waves move through a vacuum at 3 X 108 m/sec.