Physics 9702 · AS & A Level · Stress and strain

Stress and strain — practice question

Wires X and Y are each made from different metals and have unlike dimensions. The Young modulus of wire X is twice the Young modulus of wire Y. Wire X has a diameter that is half the diameter of wire Y. The two wires are stretched so that they have the same strain, and both satisfy Hooke’s law. What is the ratio $\dfrac{\text{tension in wire X}}{\text{tension in wire Y}}$?

  • A$\frac{1}{8}$
  • B$\frac{1}{2}$
  • C$1$
  • D$8$

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