A technician is marking the magnetic field direction at one point in the air gap of a horseshoe magnet. At this point, the force on a north pole would be towards the left, while the force on a south pole would be towards the right.
The technician should mark the magnetic field direction with:
one arrow pointing right, in the direction of the force on the south pole
no arrow, because the two poles experience forces in opposite directions
one arrow pointing left, in the direction of the force on the north pole
two arrows pointing left and right, one for each of the two poles
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.