Elenco Snaptricity® - Manual (Page 55)

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Project #45
1
2
1. Place the iron core rod on one side of the
magnet, making a chain. Hold/move the
compass along this chain to see how the
magnet’s magnetic field has been extended
through the rod. You can also use the iron
fillings pack to see the magnetic field.
2. Hold the compass close to the iron core rod,
then remove it from the magnet. See how
the compass reacts to this change to the
magnetic field.
3. You can use the iron core rod to help the
magnet pick up paperclips at a greater
distance than normally possible.
Operation
Iron Extension
Educational Corner:
Magnets can magnetize
other materials (usually
iron), concentrating their
magnetic charges at
opposite ends. This causes
the magnetic attraction/
repulsion that you see.
Magnetization can be
temporary or long-lasting, depending on the materials
and magnetic force used.
For example, Paper Clips
attracted to a magnet
sometimes stick together
after the magnet is
removed. Most magnets
can be demagnetized using
heat or vibration.
3
Snappy says: Permanent magnets
are made by exposing iron (or other
metals) to a much stronger magnetic
field, usually from an electromagnet.