11th Class Physics Mechanical Properties of Solids / ठोसों के यांत्रिक गुण Question Bank Mechanical Properties of Solids Conceptual Problems

  • question_answer
    Why does modulus of elasticity of most of the materials decrease with the increase of temperature?

    Answer:

                    As the temperature increases, the inter- atomic forces of attraction become weaker. For given stress, a larger strain or deformation is produced at a higher temperature. Hence the modulus of elasticity (stress/strain) decreases with the increase of temperature.


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