Answer: Perfectly incompressible (volume does not change on stretching).
- A Highly compressible, undergoing a large volume change when stretched
- B Perfectly incompressible (volume does not change on stretching)
- C Inherently brittle and fragile under any tensile load
- D Possessing zero Youngs modulus, like an ideal fluid
Correct answer: B. Perfectly incompressible (volume does not change on stretching)
Explanation: A Poissons ratio of 0.5 (the theoretical upper limit) corresponds to an incompressible material, like rubber approximately.
A typical stress-strain curve: the initial straight line (Hooke's Law region, slope = Young's modulus) ends at the elastic limit; beyond the yield point, deformation becomes permanent, peaking at the ultimate tensile strength before the wire finally fractures.
Concept context
Stress, strain, Hookes law, and the elastic moduli that describe how solids deform and recover under load.