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JEE Main20241 Feb 2024Morning ShiftPhysicsMechanical Properties of SolidsActual

With rise in temperature, the Young's modulus of elasticity

Options

  1. Achanges erratically
  2. Bdecreases
  3. Cincreases
  4. Dremains unchanged

Correct answer

B. decreases

Step-by-step solution

With rise in temperature, Young’s modulus of elasticity decreases due to the increase in atomic vibrations which leads to decrease in atomic forces. The Young's modulus is a measure of stiffness of the material. With rise in temperature, the length of the material increases which decreases its stiffness.

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