Electromagnets

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SPI 080712.2 Electromagnets
Notes
Science
Electromagnets

• An electromagnet consists of a solenoid wrapped
  around an iron core attached to a source of
  electricity

• F.Y.I. -Electric current in the wire produces a
  magnetic field which lines up atoms in the
  domains of the iron core forming an
  electromagnet.

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SPI 080712.2 Electromagnets
Notes
Science

• Electromagnet Properties

• Unlike permanent magnets, electromagnets can be
  turned on and off as needed.

• You can adjust the strength of an electromagnet
  two ways

1) Use more electrical current 2) Use more coils
in the solenoid
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SPI 080712.2 Electromagnets
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Science
How do we use electromagnets?

• Commonly found in electrical motors and switches
• Also used to
• To lift objects
• Example Junkyard crane-magnets
• Example Maglev trains
• To propel objects
• Example Railguns as weapons
• Example Railguns as launch platforms
• To look inside of people
• Example Magnetic Resonance Imaging (MRI)

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SPI 080712.2 Electromagnets
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SPI 080712.2 Electromagnets
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