Download Magnetism and Electromagnetism

Magnetism and
Electromagnetism
Magnet
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Magnets can attract and repel other
magnets.
○ They have north and south poles.
○ Opposite attracts!
How are magnets similar to electrons
and protons?
http://abyss.uoregon.edu/~js/21st_century_science/lec
tures/lec04.html
Electromagnetism
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Magnets have a magnetic field,
which is the area around the
magnet where the magnet can
make things move.
Charged particles have an electric
field.
In the picture to the right, the
magnet made the iron shavings
move
http://www.explainthatstuff.com/magnetism.htm
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Electricity and Magnets are connected
Electricity and Magnets are connected
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Electricity can make a magnetic field
Magnets can make electricity
A current can
generate a magnetic
field, which makes
the iron shavings
move
A moving
magnet will
cause
electrons to
move
Magnets
What makes a material a magnet?
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The atomic structure of a material determines if it is magnetic.
If the atoms magnetic field point in the same direction, then it is a magnet
Design Challenge
Permanent magnets have domains that are
always aligned.
Temporary magnets have domains that will
align when close to a magnetic field.
The paper clip and nail is a temporary
magnet. They will become magnetized when
there is a magnetic field. Without using a
magnet, can you magnetize the nail and
paper clip?