Basic Electrical Theory
MAGNETISM
MAGNETISM
Certain metals and metallic oxides have the ability to attract other metals. This
property is called magnetism, and the materials which have this property are
called magnets.
Some magnets are found naturally while others must be
manufactured.
EO 1.6
DEFINE the following terms:
a.
Magnetic flux
b.
Magnetic flux density
c.
Weber
d.
Permeability
e.
Magnetomotive force (mmf)
f.
Ampere turns
g.
Field intensity
h.
Reluctance
EO 1.7
DESCRIBE the following materials as they relate to
permeability, including an example and an approximate relative
permeablity.
a.
Ferromagnetic materials
b.
Paramagnetic materials
c.
Diamagnetic materials
Magnetism
Magnetism is a result of electrons spinning on their own axis around the nucleus (Figure 18).
Figure 18 Electron Spinning Around Nucleus
Produces Magnetic Field
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