Four steel screwdriver tips, P, Q, R and S, are tested. Exactly one tip has been made into a permanent magnet; the other three are unmagnetised. A known permanent magnet is used for the tests.
| Tip | Observation |
|---|---|
| P | The tip is pulled towards the north pole. |
| Q | The tip is pushed away by the south pole. |
| R | The pull on the tip becomes weaker when the known magnet is moved further away. |
| S | The tip is pulled towards the known magnet after the magnet is turned through half a turn. |
Which screwdriver tip is the permanent magnet?
Tip S
Tip P
Tip Q
Tip R
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.