Chpt' 29: Magnetic Fields

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Chpt. 29 Magnetic Fields

• Principles
• Magnetic poles are always found in pairs
  (north/south)
• Ferromagnetism occurs in iron, cobalt, and nickel
  and is due to alignment of domains

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(3) Magnetic field of typical bar magnet
SEE ACTIVE FIGURE 29.2 AT pse6.com
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(4) Earth acts like a gigantic magnet in space
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Magnetic force on a wire
B is magnetic field measured in Tesla (T)
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Magnetic Force on moving charged particle
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Circular motion of charged particles in magnetic
field
SEE ACTIVE FIG. 29.18 at pse6.com
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Aurora Borealis
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Aurora photo
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Aurora photo
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Magnetic Moments
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