Q4.With reference to figure the yield strength point corresponds to
Answer : Option AExplaination / Solution:
Yield point is point on the curve where the body deforms with negligible amount of stress.
Hence it should be B
Q5.With reference to figure the tensile stress corresponds to stress at point
Answer : Option BExplaination / Solution:
The point D on the graph is the ultimate tensile strength of the material. Beyond this point , additional strain is produced even by a reduced applied force and fracture occurs at point E.
After point D thinning of wire started and finally the wire breaks.
So D shows tensile strength.
The ratio of stress and strain is called modulus of elasticity is the characteristic of the material. they are (a) Young's modulus (b) Shear Modulus (c) Bulk modulus
Young's Modulus is denoted by Y and is given by the ratio of tensile (or compressive) stress (σ)" role="presentation" style="display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">(σ) to the longitudinal strain (ε)" role="presentation" style="display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">(ε)
