A cylindrical permanent magnet is fitted to the end of a retrieval tool. A computer model represents its magnetic field using field lines. The model uses the same scale throughout.
| Region | Mean separation between neighbouring field lines on the screen in mm |
|---|---|
| P | 11 |
| Q | 5 |
| R | 8 |
| S | 3 |
Which region has the strongest magnetic field?
Region P
Region S
Region R
Region Q
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.