An engineer wishes to design an electromagnet for a scrap metal crane. The electromagnet must be able to easily pick up and release magnetic materials when the current is switched on and off. They have an iron rod and a steel rod available to use as the core of the electromagnet.
Which rod should they use to make the electromagnet core, and how is this material classified?
Iron rod; hard magnetic material
Iron rod; soft magnetic material
Steel rod; hard magnetic material
Steel rod; soft magnetic material
169 exam-style questions on CIE IGCSE Physics Simple phenomena of magnetism, covering Simple phenomena of magnetism. Each one has a worked solution and a mark scheme showing where the marks go.