> Electromagnetism

These practical activities range from simple field patterns of bar magnets through to the laws of electromagnetic induction. We also include engineering applications of magnetism, such as the variety of clever electromagnetic machines used everywhere in industrial societies. Or magnetic materials used for computer hard drives, repeatedly magnetised and demagnetised at tiny length scales. 

Experiment collections Permanent magnets Magnetic fields due to currents in wires Electromagnets and their uses Forces on moving charges Electromagnetic induction Transformers

Guidance Exhibiting magnetic field patterns Simple theory of permanent magnetism Explaining how a transformer works