Chapter Objectives:

• Compare and contrast magnetic poles and electric charges.
• Use iron filings to interpret the strength of a magnetic field at different points near a magnet.
• Relate the motion of electrons within a material to the ability of the material to become a magnet.
• Describe what happens to the magnetic domains of iron in the presence of a strong magnet.
• Describe the magnetic field produced by a current-carrying wire.
• Describe how a magnetic field exerts a force on a charged particle in the field.
• Describe some practical applications of a magnetic field exerting a force on a current-carrying wire.
• Describe how a galvanometer and a motor work.
• Suggest possible causes for Earth's magnetic field.

Chapter Terms:

• magnetic force
• magnetic field
• magnetic domains
• electromagnet

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Chapter Outline Framework:

• Magnetic Forces
• Magnetic Poles
• Magnetic Fields
• Magnetic Domains
• Electric Currents and Magnetic Fields
• Electtromagnets
• Magnetic Force on Moving Charged Particles
• Magnetic Force on Current-CarryingWires
  • Electric Meters
  • Electric Motors
  • Earth's Magnetic Field
  • Cosmic rays
  • Biomagnetism

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