A steel bar is weakly magnetised. It is heated strongly and then cooled.
What effect will this have on the magnetism of the steel bar under the two different conditions shown in the table?
| Heating and cooling the steel while aligned parallel to a strong external magnetic field | Heating and cooling the steel while placing it inside a magnetically shielded container with no magnetic field | |
|---|---|---|
| A | It becomes magnetised more strongly | It becomes magnetised more strongly |
| B | It becomes magnetised more strongly | It loses its magnetism |
| C | It loses its magnetism | It becomes magnetised more strongly |
| D | It loses its magnetism | It loses its magnetism |
Parallel to field: It becomes magnetised more strongly. Shielded: It becomes magnetised more strongly.
Parallel to field: It becomes magnetised more strongly. Shielded: It loses its magnetism.
Parallel to field: It loses its magnetism. Shielded: It becomes magnetised more strongly.
Parallel to field: It loses its magnetism. Shielded: It loses its magnetism.
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.