An electromagnet is designed to lift and drop scrap iron in a recycling center. Why is soft iron, rather than steel, suitable for the core of this electromagnet?
Soft iron loses its magnetism easily when the current is switched off.
Soft iron has a lower electrical resistance than steel.
Soft iron is less dense than steel, making it easier to lift.
Soft iron becomes a permanent magnet.
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.