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Magnetism is caused by the fields that exist around magnets. These magnetic fields can be investigated by looking at the effects of the forces they exert on other magnets and magnetic materials.

Electromagnetism is caused by the magnetic fields around wires carrying an electric current. The induced magnetic field of a wire can interact with other nearby magnets, producing a force.

Electromagnetic induction can create a voltage. This voltage can make current flow, and the effect is used in electricity generation.

Transformers use electromagnetic induction to change the potential difference of alternating currents. Potential difference and current changes can be calculated, as the power transfer is constant.

Understanding how to approach exam questions helps boost exam performance. Questions will include multiple choice, descriptions and explanations, using mathematical skills and extended writing.