A-LevelPhysicsDeformation of solidsMay/June 2011Paper 1 Q231 Mark
The behaviour of a wire under tensile stress may be described in terms of the Young modulus E of the material of the wire and of the force per unit extension k of the wire. For a wire of length L and cross-sectional area A, what is the relation between E and k?
AE = A / kL
BE = kA / L
CE = kL / A
DE = L / kA
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The correct answer is C. This question tests the candidate's understanding of deformation of solids within the Physicssyllabus. The examiner's mark scheme requires...
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