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Question 108 of 293 in Magnetism and Electromagnetism

Magnetic fields

4 marks · Normal

A student places two bar magnets with their north poles facing each other, 5 cm apart on a piece of paper.

Draw the magnetic field pattern that would be seen with iron filings. Include field lines and accurately label the poles.

Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.

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Must show: Both bar magnets drawn with N facing N, Poles clearly labelled, Field lines curve outward and do not join between the NN faces (showing repulsion), Field lines are denser at the poles

Common mistakes: Drawing lines joining NN faces; Not separating the field lines between magnets

Show mark scheme and worked solution

Marking points

D1 · 1 mark · Both bar magnets drawn parallel and 5 cm apart

L1 · 1 mark · Poles labelled with N and S on each magnet

F1 · 1 mark · Field lines curve outward and do not connect directly between the two north poles (showing repulsion)

F2 · 1 mark · Field lines are closely spaced at the poles

Worked solution

Geometry diagram with points N, S, N, SNSNS
Field lines for two bar magnets with north poles facing (show repulsion and high density at poles)
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