A-LevelPhysicsDeformation of solidsOct/Nov 2014Paper 1 Q201 Mark
The stress-strain graph for a glass rod, up to the point at which it breaks, is shown below. [Figure 20.1] Which statement about the glass rod is correct?
AHooke's law is obeyed for all values of stress up to the breaking point.
BThe glass is ductile.
CThe glass shows plastic deformation.
DWhen the cross-sectional area of the rod is doubled, the ultimate tensile stress of the rod is halved.
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of deformation of solids within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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