An apprentice technician is investigating the magnetic field interaction between two bar magnets placed parallel to each other on a sheet of paper, with their north poles pointing in the same direction.
Describe how the technician can use a single plotting compass and a pencil to accurately map the shape and direction of a magnetic field line in the space surrounding the magnets.
30 exam-style questions on Edexcel GCSE Physics 12.1 Magnets and magnetic fields. Each one has a worked solution and a mark scheme showing where the marks go.