→
WHAT’S HAP
PENING?
HERE'S HOW
1. Place the box with iron powder on top of
each of the magnets in turn, as you did
in Experiment 19.
2. This time, though, pay special attention
to the patterns that form after shaking
and knocking the box holding the iron
powder. Keep the magnet pressed
tightly against the box as you do this.
You may have to try it a few times before
you get a pretty pattern.
Lines of force
made visible
YOU WILL NEED
→ all the magnets
→ box with iron powder
In a magnetic fi
eld, each
individual iron p
article turns i
nto
a tiny magnet t
hat behaves
similarly to a c
ompass needl
e.
These magnet
s stick togeth
er by
their mutually a
ttracting pole
s,
and form chai
ns in the magn
etic
field running p
arallel to the l
ines
of force.
These chains a
re particularly e
asy
to see with th
e horseshoe
magnet, runn
ing in the shap
e of
an arch from o
ne pole to the
other. With th
e other magne
ts,
especially the b
lock magnet, y
ou
can clearly se
e how the line
s of
force emerge f
rom the poles
.
EXPERIMENT 24
Magnetic Force and Magnetic Fields |
33
Summary of Contents for 665050
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