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Physics (AS & A Level) · Oct / Nov 2023 · Paper 12 · Question 19

9702Elastic and plastic behaviour

The force–extension graph for a wire is shown. Which row could identify the labels X, Y and Z?

  1. Alimit of proportionality: X; region of elastic deformation: Y; region of plastic deformation: Z
  2. Blimit of proportionality: Z; region of elastic deformation: Y; region of plastic deformation: X
  3. Climit of proportionality: Y; region of elastic deformation: Z; region of plastic deformation: X
  4. Dlimit of proportionality: Z; region of elastic deformation: X; region of plastic deformation: Y

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Correct answer: D. limit of proportionality: Z; region of elastic deformation: X; region of plastic deformation: Y

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