Which one of the following statement is wrong?
Correct answer: A. Young's modulus for a perfectly rigid body is zero
- A. Young's modulus for a perfectly rigid body is zero
- B. Bulk modulus is relevant for solids, liquids, and gases
- C. Rubber is less elastic than steel
- D. The Young's modulus and shear modulus are relevant for solids
Explanation
The correct answer is Option A: 'Young's modulus for a perfectly rigid body is zero' because it is incorrect. A perfectly rigid body would have an infinite Young's modulus since it would not deform under any amount of applied stress, indicating infinite resistance to deformation. Option B is correct because the bulk modulus is applicable to solids, liquids, and gases, describing their responses to uniform compression. Option C is correct because, in terms of physics, steel is more elastic than rubber, meaning it returns to its original shape better after stress. Option D is correct because Young's modulus and shear modulus are indeed relevant for describing the mechanical behaviour of solids.
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