An opaque tube contains a fixed bar magnet. One pole is close to end A of the tube and the other pole is close to end B. The effect of the Earth's magnetic field is negligible.
A student records this result.
| Arrangement | Observation after the compass needle settles |
|---|---|
| End A faces the north-seeking end of a compass across a small gap. | The north-seeking end points towards end A. |
State which pole of the bar magnet is nearest end A.
Without moving the compass, the student turns the tube end for end. End B now faces the compass.
Explain which way the north-seeking end of the compass needle now points.
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.