AQA GCSE · Question 02.3 · Magnetism and electromagnetism
Figure 2 shows magnetic field lines around a bar magnet. Which letter shows where the magnetic field is strongest?
Answer options:
A.
A
B.
B
C.
C
How to approach this question
Look at the diagram of the magnetic field lines. The strength of the magnetic field is represented by the density of the field lines (how close together they are). Identify the point (A, B, or C) where the lines are most concentrated.
Full Answer
A.A✓ Correct
A
The density of magnetic field lines indicates the strength of the magnetic field. Where the lines are closest together, the field is strongest. In the diagram, the lines are most concentrated at the poles of the magnet. Point A is located at the North pole, where the lines are very close together. Therefore, the magnetic field is strongest at A.
Common mistakes
✗ Choosing B, where the lines are spread out.\n✗ Choosing C, which is inside the magnet, but the question refers to the points shown in the external field.
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