An industrial electromagnet is used to lift and release scrap iron in a recycling yard. Why is soft iron, rather than steel, used as the core of this electromagnet?
It is easily magnetized and demagnetized.
It remains permanently magnetized.
It conducts electricity better than steel.
It is less dense 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.