Physics: 3. Magnetism
To show attraction and repulsion between magnets
1. Hang a magnet from a wooden support.
2. Bring another magnet up close to it.
3. Notice that if you bring up a north pole it repels the north of the
first magnet, but if you bring up the south-pole end it attracts
the north-pole of the first magnet.
Conclusion:
Similar poles repel, opposite poles attract
To test a variety of materials for magnetism
To test a material for magnetism bring a magnet up to the material and see if the material
becomes attracted to the magnet.
To demonstrate that the Earth has a magnetic field, and locate North and South.
When we allow magnets to hang free, they come to rest with one end facing north and the
other facing south.
We therefore label the north-facing end ‘the North Pole’, and the south-facing end ‘the
South-Pole’.
‘pole’ means ‘end’.
Uses of magnets
Fridge magnets, in motors, in speakers
