Question
Question: The stress-strain graph for a metal wire is as shown in the figure. In the graph, the region in whic...
The stress-strain graph for a metal wire is as shown in the figure. In the graph, the region in which Hooke’s law is obeyed, the ultimate strength and fracture points are represented by
A
OA, C, D
B
OB, D, E
C
OA, D, E
D
OB, C, D
Answer
OA, D, E
Explanation
Solution
: In the region OA, the graph is linear showing that stress is proportional to the strain. Thus, in this region Hooke’s law is obeyed.
The point D on the graph is known as ultimate tensile strength.
The point E on the graph is known as fracture point.