Topic 2: Elasticity – Stress and Strain

Q1. Elasticity is the property of a material to:
A) Break easily
B) Conduct heat
C) Regain original shape
D) Change colour

Answer: C


Q2. Stress is defined as:
A) Force × area
B) Force / area
C) Area / force
D) Force × displacement

Answer: B


Q3. SI unit of stress is:
A) Newton
B) Joule
C) Pascal
D) Watt

Answer: C


Q4. Strain is defined as:
A) Force / area
B) Change in length
C) Change in dimension / original dimension
D) Area × length

Answer: C


Q5. SI unit of strain is:
A) Pascal
B) Newton
C) Joule
D) No unit

Answer: D


Q6. Stress produced by tangential force is called:
A) Longitudinal stress
B) Volumetric stress
C) Shearing stress
D) Tensile stress

Answer: C


Q7. Which of the following is a type of strain?
A) Thermal strain
B) Longitudinal strain
C) Tensile stress
D) Pressure

Answer: B


Q8. Stress and strain are related to:
A) Motion
B) Electricity
C) Elasticity
D) Heat

Answer: C

Chapter 6: Mechanical Properties of Solids

Topic 2: Elasticity – Stress & Strain – Quick Revision

1. Elasticity

Property of a material to regain original shape after removal of deforming force.

2. Stress

Stress = Force / Area

SI unit: Pascal (Pa)

Types of Stress

• Longitudinal stress
• Volumetric stress
• Shearing stress

3. Strain

Strain = Change in dimension / Original dimension

No unit

Types of Strain

• Longitudinal strain
• Volumetric strain
• Shearing strain

Exam Focus (MHT-CET)

Direct MCQs are asked on definitions, formulas, SI units and types of stress and strain.