Physics 9702 · AS & A Level · Stress and strain

Stress and strain — practice question

A copper wire whose diameter is $1.6\,\text{mm}$ is extended, while remaining within its limit of proportionality, by a tensile force of $430\,\text{N}$. The Young modulus of copper is $130\,\text{GPa}$. Determine the strain in the wire.

  • A$4.1 \times 10^{-4}$
  • B$1.3 \times 10^{-3}$
  • C$1.6 \times 10^{-3}$
  • D$5.2 \times 10^{-3}$

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