Answer: Fractional change in volume.
- A Change in length according to conventional understanding
- B Change in shape in routine practice
- C Fractional change in volume
- D Change in area mainly
Correct answer: C. Fractional change in volume
Explanation: Bulk modulus B = -ΔP/(ΔV/V), describing the resistance of a material to uniform compression.
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.