How do magnets work?
In an ordinary piece of iron, the electrons spin in different directions. But in an iron magnet, they all spin in the same direction. This creates a magnetic field, an invisible region where magnetic forces are at work. Put some iron fillings on a piece of thin card, and a magnet underneath. If you tap the card, the fillings line up in the direction of the field.

Magnetic field
Magnets have two poles. The magnetic field spreads around the magnet from one pole to the other.

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