CAIE IGCSE Physics Field Strength and Line Spacing
Practise comparing magnetic field strength from field-line spacing, selecting the strongest or weakest position and justifying the choice from a diagram.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- identify the strongest field where magnetic field lines are closest together in the diagram
- rank labelled positions from weakest to strongest by comparing the spacing of nearby lines
- justify a selected point by linking closer line spacing to a larger force on a magnetic pole
4.1.11—Relative strength of a magnetic field question 1
Fig. 6.1 shows a person using a magnetic window cleaner. The part on the outside of the window is attracted to the inside part through the glass window.
Fig. 6.1
Each part of the window cleaner contains two magnets. Fig. 6.2 shows the magnetic field between the parts of the window cleaner.
ig. 6.2
State how the field lines in Fig. 6.2 show different strengths of the magnetic field between the magnets.
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