An electromagnet is designed to lift and release scrap iron in a recycling yard. Soft iron, rather than steel, is used as the core of this electromagnet.
Why is soft iron preferred over steel for this purpose?
Soft iron is easily magnetised and loses its magnetism when the current is turned off.
Soft iron becomes a permanent magnet that remains magnetic permanently.
Soft iron is a better electrical insulator than steel.
Soft iron has a lower density than steel.
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.