Figure 1 shows how the magnetic field strength varies with distance from a straight current-carrying wire.

Use the graph in Figure 1 to calculate the decrease in magnetic field strength when the distance from the wire increases from 2 cm to 6 cm.
Practise Edexcel GCSE Physics Magnets and magnetic fields with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Physics (1PH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.