Magnetic Strength

We use two magnets and a set of scales to examine magnetic field and strength. One magnet is attached to the scales and a second is lowered towards it. When opposite poles are facing each other, the weight on the scales decreases as the magnet is lifted. When like poles are facing each other, the weight increases as the magnets repel each other.

Physics - Electricity And Circuits - Learning Points.
Permanent magnets attract magnetic materials.
Two permanent magnets can either attract or repel each other.
Permanent magnets are surrounded by a magnetic field and this field interacts with magnetic materials and other magnetic fields.

A Twig Experiment Film.
Let students experience real experiments in lab conditions anywhere, from setup, method all the way through to analysis and real-world application.