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O-LevelPhysicsMagnetism5054/11 · Oct/Nov 2016 · Q301 Mark

Delicate instruments are often placed in a box to screen them from stray magnetic fields. What is the material used for the box and why is it chosen?

AAluminium is used because it is a non-magnetic material.

BCopper is used because it has a low electrical resistance.

CPolythene is used because it is a good electrical insulator.

DSoft iron is used because it is a magnetic material.

✓ Correct answer

D: Soft iron is used because it is a magnetic material.

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About this question

Topic: Magnetism, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2016 Paper 1 Variant 1, question 30.

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