MAGNETIC FIELDS
3 marks · EasyTwo bar magnets are placed near each other on a table. Their north poles are facing each other about 5 cm apart.
Describe what will happen to the magnets.
Draw a labelled diagram to show the magnetic field lines between the two magnets.
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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(a) They will repel each other (move apart).
(b) Diagram with field lines showing repulsion: lines curve outwards between the magnets. · must show Correct field lines; clear labels for N poles.
Must show: Field lines curve away between facing north poles, do not join., Clear labelling of N poles.
Common mistakes: Field lines joining between two north poles.
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Correctly states the magnets will repel/move apart.
B2 (b) · 1 mark · Draws field lines that do not join between the two north poles, but curve outward/repel.
B3 (b) · 1 mark · Correctly labels the north poles.
Worked solution
a) The two magnets will repel each other. b) [Diagram]: Two rectangles labelled 'N' on facing sides, with curved field lines that bend away from the space between the two north poles, not joining between them.