Which of the following is true for elastic potential energy density

  • A

    Energy density $=$ $\frac{1}{2} \times {\rm{strain}} \times {\rm{stress}}$

  • B

    Energy density $=$ ${{\rm{(strain)}}^2} \times {\rm{volume}}$

  • C

    Energy density $=$ $strain$ $\times$ $volume$

  • D

    Energy density $=$ $stress$ $\times$ $volume$

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