A piece of steel is weakly magnetised. It is struck repeatedly with a hammer. What effect will this have on the steel?
- Awhen the steel is parallel to a strong magnetic field: it becomes magnetised more strongly; when the steel is at right-angles to a weak magnetic field: it becomes magnetised more strongly
- Bwhen the steel is parallel to a strong magnetic field: it becomes magnetised more strongly; when the steel is at right-angles to a weak magnetic field: it loses its magnetism
- Cwhen the steel is parallel to a strong magnetic field: it loses its magnetism; when the steel is at right-angles to a weak magnetic field: it becomes magnetised more strongly
- Dwhen the steel is parallel to a strong magnetic field: it loses its magnetism; when the steel is at right-angles to a weak magnetic field: it loses its magnetism