NEET UG - Elastic behaviour, stress strain relationship, Hookes law Online Test (MCQ Quiz)

1. What property of a material allows it to resist deformation under stress and return to its original shape after the stress is removed?

A) Plasticity B) Elasticity C) Brittleness D) Ductility

2. Which of the following is a measure of the external force applied per unit area of a body?

A) Strain B) Stress C) Elastic Limit D) Modulus of Elasticity

3. Strain is defined as the ratio of:

A) Change in volume to original volume B) Change in length to original length C) Applied force to original area D) Applied force to change in length

4. Hooke's Law states that within the elastic limit, stress is directly proportional to:

A) Volume B) Force C) Strain D) Area

5. The constant of proportionality between stress and strain within the elastic limit is called:

A) Strain B) Stress C) Elastic Limit D) Modulus of Elasticity

6. Which type of stress is produced when a force is applied perpendicular to the surface of a body?

A) Shear stress B) Tensile stress C) Compressive stress D) Normal stress

7. Tensile stress is a type of normal stress that tends to:

A) Compress a body B) Stretch a body C) Twist a body D) Bend a body

8. Compressive stress is a type of normal stress that tends to:

A) Stretch a body B) Twist a body C) Compress a body D) Shear a body

9. Shear stress is produced when a force is applied:

A) Perpendicular to the surface B) Parallel to the surface C) Along the length D) Across the width

10. Which type of strain is associated with shear stress?

A) Linear strain B) Volumetric strain C) Shear strain D) Tensile strain

11. Shear strain is defined as the ratio of:

A) Change in length to original length B) Displacement parallel to the surface to the perpendicular distance C) Change in volume to original volume D) Change in radius to original radius

12. The elastic limit is the maximum stress that a material can withstand beyond which it will:

A) Return to its original shape B) Undergo permanent deformation C) Break immediately D) Become perfectly elastic

13. A stress-strain curve for a ductile material typically shows a region where strain increases significantly with little increase in stress. This region is known as:

A) Elastic region B) Plastic region C) Fracture point D) Yielding

14. The point on a stress-strain curve beyond which the material undergoes permanent deformation is called the:

A) Ultimate tensile strength B) Elastic limit C) Fracture point D) Proportional limit

15. Ultimate Tensile Strength (UTS) represents the maximum stress a material can withstand:

A) Before permanent deformation B) Before breaking C) Under shear forces D) At the elastic limit

16. Which modulus of elasticity relates stress and strain for tensile or compressive forces?

A) Shear modulus B) Bulk modulus C) Young's modulus D) Poisson's ratio

17. Young's modulus (Y) is defined as:

A) Shear stress / Shear strain B) Normal stress / Volumetric strain C) Tensile stress / Linear strain D) Compressive stress / Linear strain

18. What is the SI unit of Young's modulus?

A) N B) m C) Pa D) N/m

19. A material with a high Young's modulus is considered:

A) Flexible B) Stiff C) Brittle D) Easily deformable

20. The modulus of elasticity that relates shear stress to shear strain is called:

A) Young's modulus B) Bulk modulus C) Shear modulus D) Modulus of Rigidity

21. Shear modulus (G) is defined as:

A) Tensile stress / Linear strain B) Shear stress / Shear strain C) Normal stress / Volumetric strain D) Bulk stress / Volumetric strain

22. The modulus of elasticity that relates volumetric stress to volumetric strain is called:

A) Young's modulus B) Shear modulus C) Modulus of Rigidity D) Bulk modulus

23. Bulk modulus (K) is defined as:

A) Shear stress / Shear strain B) Tensile stress / Linear strain C) - (Volumetric stress) / Volumetric strain D) Normal stress / Volumetric strain

24. A negative sign is included in the definition of bulk modulus because:

A) Pressure is negative B) Volume increases with applied stress C) Volume decreases with applied stress D) The material is incompressible

25. Liquids are generally considered:

A) Highly elastic B) Incompressible C) Easily compressible D) Rigid

26. Poisson's ratio (σ) is the ratio of:

A) Lateral strain to longitudinal strain B) Longitudinal strain to lateral strain C) Shear strain to shear stress D) Tensile stress to linear strain

27. For most materials, the value of Poisson's ratio lies between:

A) 0 and 1 B) -1 and 0 C) 0 and 0.5 D) 0.5 and 1

28. A material that breaks with little or no plastic deformation after the elastic limit is reached is called:

A) Ductile B) Malleable C) Brittle D) Elastic

29. The stress at which a material fractures is known as:

A) Yield strength B) Elastic limit C) Tensile strength D) Fracture strength

30. When a wire is stretched by a force, the stress experienced by the wire is:

A) Shear stress B) Volumetric stress C) Tensile stress D) Compressive stress

31. If a wire of length L and cross-sectional area A is stretched by a force F, the tensile stress is given by:

A) F/L B) F/A C) A/F D) L/F

32. If a wire of original length L elongates by ΔL under a tensile stress, the tensile strain is:

A) ΔL B) L/ΔL C) ΔL/L D) L * ΔL

33. The relationship Y = Stress / Strain holds true only:

A) Beyond the elastic limit B) Within the elastic limit C) At the point of fracture D) For all stress values

34. Which of the following represents the dimensional formula for stress?

A) [MLT⁻²] B) [ML⁻¹T⁻²] C) [ML²T⁻²] D) [MLT⁻¹]

35. Which of the following represents the dimensional formula for strain?

A) [MLT⁻²] B) [M⁰L⁰T⁰] C) [ML⁻¹T⁻²] D) [MLT⁻¹]

36. A steel wire is much stiffer than a rubber cord. This means steel has a:

A) Lower Young's modulus B) Higher Young's modulus C) Lower elastic limit D) Higher Poisson's ratio

37. When a solid cube is subjected to uniform pressure from all sides, it experiences:

A) Tensile stress and linear strain B) Shear stress and shear strain C) Volumetric stress and volumetric strain D) Compressive stress and linear strain

38. Which of the following is NOT a modulus of elasticity?

A) Young's Modulus B) Shear Modulus C) Bulk Modulus D) Poisson's Ratio

39. If the stress applied to a material is doubled, and it remains within the elastic limit, the strain will:

A) Remain the same B) Be halved C) Be doubled D) Become zero

40. The area under the elastic portion of a stress-strain curve represents:

A) Work done per unit volume in deforming the material B) Energy stored per unit volume C) Toughness D) Resilience

41. The area under the entire stress-strain curve up to the fracture point represents:

A) Elastic limit B) Yield strength C) Toughness D) Resilience

42. A material is considered ductile if it can be drawn into wires. This property is related to its ability to:

A) Deform elastically B) Deform plastically without fracture C) Resist shear stress D) Withstand high compressive forces

43. Which of the following is a unit of stress?

A) N/m³ B) Nm C) N/m² D) m/N

44. A spring obeys Hooke's Law. If the spring is stretched by 2 cm by a force of 10 N, what force is required to stretch it by 6 cm?

A) 10 N B) 20 N C) 30 N D) 40 N

45. Which of the following statements about elasticity is incorrect?

A) Elasticity is the property of matter to restore its original shape. B) Hooke's law is valid up to the elastic limit. C) All materials are perfectly elastic. D) Stress is directly proportional to strain within the elastic limit.

46. For a perfectly rigid body, which of the following is true?

A) Young's modulus is zero B) Young's modulus is infinite C) Bulk modulus is zero D) Shear modulus is zero

47. The phenomenon where a material returns to its original shape after the removal of deforming force is called:

A) Plasticity B) Elasticity C) Brittleness D) Malleability

48. Which stress-strain relationship is parabolic?

A) Within the elastic limit B) In the plastic region for ductile materials C) For brittle materials D) Beyond the ultimate tensile strength

49. The ratio of the change in diameter to the original diameter of a wire when stretched is called:

A) Longitudinal strain B) Volumetric strain C) Lateral strain D) Shear strain

Elastic behaviour, stress strain relationship, Hookes law - Online Test

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