Magnetism and magnetic materials
3 marks · NormalA student has a collection of four rods made from different materials: iron, aluminium, copper, and steel.
Describe a simple test the student could use to identify which of the rods are magnetic.
Name all the rods that will be attracted to a bar magnet.
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.
Show answer
(a) Bring a magnet near each rod; those attracted are magnetic. · must show Bringing magnet near rods, Observation of attraction
(b) Iron and steel · must show Iron, Steel
Must show: test using magnet, identify iron and steel as magnetic
Common mistakes: Trying to magnetise with another rod; Leaving out steel
Show mark scheme and worked solution
Marking points
M1 (a) · 1 mark · Describes bringing a magnet close to the rod.
A1 (a) · 1 mark · Correctly identifies that only rods attracted are magnetic.
B1 (b) · 1 mark · Names iron and steel as rods that will be attracted to a magnet.
Worked solution
(a) Use a magnet to see which rods are attracted. Any rods that move towards the magnet are magnetic materials.
(b) Iron and steel rods will be attracted to the magnet.