CREATING A UNIFORM MAGNETIC FIELD
2 marks · EasyExplain how you can tell from a diagram whether the magnetic field shown is uniform or not.
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If the field lines in the diagram are straight, parallel, and evenly spaced, the field is uniform. If the lines curve or if their spacing changes, the field is not uniform.
Also accept: Uniform fields are shown by straight and parallel lines that are evenly spaced.; Non-uniform fields have curved or unevenly spaced lines.
Common mistakes: Only look at the number of lines.; Assume any set of lines is uniform.
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Marking points
B1 · 1 mark · Mentions straight and parallel field lines.
B1 · 1 mark · Mentions even spacing of the lines.
Worked solution
A diagram showing a uniform field will have straight, parallel and evenly spaced field lines. If lines are curved or become more/less spaced, the field is not uniform.