EXPERIMENT 36
38
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WHAT’S HAPPENING
While the two poles of a magnet will behave
identically toward pieces of iron, they do not be-
have identically toward other magnetic poles.
Two poles of the same color will repel each oth-
er, while different-colored poles will attract
each other.
To tell them apart, one pole is called the
north
pole, while the other is called the south pole.
Two north poles or two south poles will repel
each other, while unlike poles will attract.
In your magnets, the red end is the north pole,
while the blue end is the south pole.
Magnetic friends and
foes
You have already tested a lot of materials to see how
they behave in response to magnets. But how do
magnets behave with each other?
HERE’S HOW
Hold the two bar magnets close to each other.
What do you feel?
Turn one of the magnets around. What do you
notice? Pay attention to the colors of the ends!
Repeat this experiment with the ring magnets.
Then try seeing how a ring and a bar magnet
respond to each other.
THE POLE
COLORS
The red and blue
colors are just for
purposes of identifi-
cation, of course.
The reason the poles
behave differently
has to do with certain
properties of their
atoms, which are the
smallest particles in
the magnetic mate-
rial.
Summary of Contents for Electricity and Magnetism 620417
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