The Young's modulus of a wire of length L and radius r is Y. If the length is reduced to L/2 and radius to r/2, its Young's modulus will be
Correct answer: C. Y
- A. Y/2
- B. 2Y
- C. Y
- D. 4Y
Explanation
Young's modulus (Y) is a material property and does not depend on the dimensions of the specimen. Therefore, reducing the length and radius of the wire does not change its Young's 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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