A technician uses a magnetic field sensor to take readings at several positions inside a small region.
Which set of readings indicates that the field is uniform?
The field has the same direction at every position, but its strength increases.
The field's strength decreases and its direction changes across the region.
The field has the same strength at every position, but its direction changes.
The field has the same strength and the same direction at every position.
70 exam-style questions on Edexcel GCSE Physics 12.1 Magnets and magnetic fields, covering 12.1.1 Magnetic poles, 12.1.2 Magnetic materials; permanent and induced magnets, 12.1.3 Magnetic fields, and 12.1.4 Plotting compasses and the Earth's magnetic field. Each one has a worked solution and a mark scheme showing where the marks go.