The temperature of a wire is doubled, the Young's modulus of elasticity
Correct answer: D. Will decrease
- A. Will also double
- B. Will become four times
- C. Will remain the same
- D. Will decrease
Explanation
Young's modulus, a measure of a material's stiffness, generally decreases with an increase in temperature. This is because higher temperatures cause atoms to vibrate more vigorously, weakening the bonds between them and thus reducing the material's ability to withstand deformation. Therefore, when the temperature of a wire is doubled, the Young's modulus of elasticity decreases. Option A is incorrect because Young's modulus does not increase with temperature. Option B is incorrect because the modulus does not quadruple; rather, it typically decreases. Option C is incorrect because it fails to consider the impact of temperature on atomic interactions and the resulting decrease in modulus.
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About Physics of Solids
Solids are compared through crystal structure, amorphous arrangement, elasticity, plastic deformation, stress, strain and Young’s modulus. Electrical behavior depends on available charge carriers and band structure, so conductors, insulators and semiconductors must be distinguished from mechanical properties such as strength, stiffness and brittleness.
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