A-LevelPhysicsDeformation of solids9702/12 · Oct/Nov 2022 · Q201 Mark

A known tensile force acts on a metal wire. The wire does not exceed its limit of proportionality. Which two measurements enable the strain of the wire to be calculated?

Athe unstretched length of the wire and the cross-sectional area of the wire

Bthe unstretched length of the wire and the extension of the wire

Cthe Young modulus of the metal and the extension of the wire

Dthe Young modulus of the metal and the unstretched length of the wire

✓ Correct answer

B: the unstretched length of the wire and the extension of the wire

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Topic: Deformation of solids, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2022 Paper 1 Variant 2, question 20.

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