Two steel bars look exactly the same. One of the bars is a permanent magnet. The other bar is unmagnetised. A third bar, known to be a permanent magnet and free to turn, is also available.
Describe a test that shows which of the two steel bars is the permanent magnet.
Explain why attraction alone cannot be used as the test.
40 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.