An engineer is designing the core for an electromagnet to be used in a scrap metal yard. The electromagnet needs to easily magnetize and demagnetize so it can pick up and drop metal objects. She can choose between an iron rod and a steel rod.
Which rod should she use for the electromagnet core, and is this rod a hard or soft magnetic material?
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.