Q1: A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is

ANS:C - 0.44

A Poisson's ratio of 0.44 implies that when a material is stretched in one direction (axial strain), it tends to contract in the perpendicular directions (lateral strain) by 44% of the amount of elongation. This value is characteristic of many common materials like steel, aluminum, and concrete. In practical terms, if you stretch a material with a Poisson's ratio of 0.44 along one axis, it will tend to contract in the perpendicular directions by approximately 44% of the elongation along the stretched axis. This phenomenon is observed in many everyday situations, such as when you pull on a rubber band or stretch a piece of dough.