A model railway carriage has a sealed coupling containing either a permanent magnet or an initially unmagnetised iron component. A test magnet has labelled north and south poles. The carriage is on a level track. When the north pole of the test magnet is held close to the coupling, the carriage rolls away from the test magnet.
What can be concluded about the component inside the coupling?
It is an initially unmagnetised iron component that repels the test magnet.
It is an iron component that has become an induced magnet.
It is a permanent magnet, but the pole facing the test magnet cannot be determined.
It is a permanent magnet with its north pole facing the test magnet.
80 exam-style questions on AQA GCSE Physics 7.1 Permanent and induced magnetism, magnetic forces and fields, covering 7.1.1 Poles of a magnet and 7.1.2 Magnetic fields. Each one has a worked solution and a mark scheme showing where the marks go.