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Discovery of magnetic fields
Let's find out more about this invisible force which guides the compass. How strong is it? What shape is it?
Exploring the effect of a permanent magnet on compass. What is going on?
A compass will align with the lines of force around a magnet. How could you do this in 3 dimensions?
magnetic materials seem to have two sides (we could call them poles). Depending on orientation they can be attractive or repulsive. What is the shape of the force between fields?
What happens to the magnetic field of a magnet in the presence of a another material which is attracted to it. Why does this happen?
How can we increase the strength of a bar magnet using a piece of steel? Why is it stronger?