MEDIUM
11th CBSE
IMPORTANT
Earn 100

Define elasticity. When a body is called elastic and when is it called plastic? Explain elastic limit.

Important Questions on Mechanical Properties of Solids

HARD
11th CBSE
IMPORTANT
Super Refresher Physics 11>Chapter 9 - Mechanical Properties of Solids>SELF EVALUATION TEST>Q 12
Draw stress strain curve for a loaded steel wire and hence define the term permanent set, elastic limit, yield point and tensile strength. 
HARD
11th CBSE
IMPORTANT
Super Refresher Physics 11>Chapter 9 - Mechanical Properties of Solids>SELF EVALUATION TEST>Q 13
Define young’s modulus of elasticity, normal stress and longitudinal strain. Give unit of each of them. Derive an expression for the elastic potential energy of a wire, when stretched.
HARD
11th CBSE
IMPORTANT
Super Refresher Physics 11>Chapter 9 - Mechanical Properties of Solids>SELF EVALUATION TEST>Q 14
Derive an expression for the elastic potential energy stored in a stretched wire under stress. Define the terms elastic after effect and elastic fatigue.