JEE Main - Elastic behaviour, stress–strain and Hooke’s law Online Test (MCQ Quiz)

1. What is the SI unit of stress?

A) Pascal (Pa) B) Newton (N) C) Joule (J) D) Watt (W)

2. Which of the following best describes stress?

A) The force applied per unit area B) The change in length per unit original length C) The work done per unit volume D) The energy stored per unit volume

3. Strain is defined as the ratio of:

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

4. Hooke's Law states that within the elastic limit:

A) Stress is directly proportional to strain B) Strain is directly proportional to stress C) Stress is inversely proportional to strain D) Strain is inversely proportional to stress

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

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

6. Which type of stress is caused by forces acting parallel 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:

A) Normal stress B) Shear stress C) Tangential stress D) Volumetric stress

8. Compressive stress is also a type of:

A) Normal stress B) Shear stress C) Tangential stress D) Longitudinal stress

9. What is the unit of strain?

A) Dimensionless B) Pascal (Pa) C) Newton (N) D) Meter (m)

10. The elastic limit is the point up to which:

A) A material returns to its original shape after the removal of deforming force B) A material undergoes permanent deformation C) A material breaks D) Stress is directly proportional to strain

11. When a wire is stretched by a force, the stress developed in the wire is:

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

12. If the deforming force is applied perpendicular to the surface of a body, the stress developed is:

A) Normal stress B) Shear stress C) Tangential stress D) Longitudinal stress

13. The modulus of elasticity that relates tensile or compressive stress to tensile or compressive strain is called:

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

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

A) Shear Modulus (or Modulus of Rigidity) B) Young's Modulus C) Bulk Modulus D) Poisson's Ratio

15. Which property of a material indicates its resistance to elastic deformation?

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

16. A material that breaks without significant plastic deformation is called:

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

17. A material that can undergo large plastic deformation before breaking is called:

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

18. The point beyond which a material does not return to its original shape is called the:

A) Elastic limit B) Yield point C) Breaking point D) Proportional limit

19. Stress is measured in units of:

A) N/m² B) N/m C) Nm D) N·m

20. Strain is a measure of:

A) Relative deformation B) Absolute deformation C) Applied force D) Material strength

21. If a force F is applied on an area A, the stress is given by:

A) F/A B) A/F C) F*A D) F+A

22. If a wire of length L stretches by ΔL, the strain is given by:

A) ΔL/L B) L/ΔL C) ΔL D) L

23. Young's Modulus (Y) is defined as:

A) Tensile stress / Tensile strain B) Shear stress / Shear strain C) Bulk stress / Bulk strain D) Stress / Volume strain

24. The SI unit of Young's Modulus is:

A) Pascal (Pa) B) Newton (N) C) Joule (J) D) Dimensionless

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

A) Stiff B) Flexible C) Brittle D) Soft

26. A material with a low Young's modulus is considered:

A) Flexible B) Stiff C) Hard D) Rigid

27. The stress–strain curve typically shows:

A) The relationship between stress and strain for a material B) The force applied versus time C) The energy stored versus volume D) The density versus temperature

28. The region of the stress-strain curve where Hooke's Law is obeyed is called the:

A) Proportional limit B) Elastic limit C) Yield point D) Ultimate strength

29. The yield point on a stress-strain curve represents the stress at which:

A) Permanent deformation begins B) The material breaks C) Hooke's Law is no longer valid D) The stress is maximum

30. The ultimate tensile strength of a material is the:

A) Maximum stress the material can withstand before breaking B) Stress at the elastic limit C) Stress at the yield point D) Stress required to cause fracture

31. Which type of stress is associated with a change in shape without a change in volume?

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

32. The modulus of elasticity that measures resistance to volume changes is:

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

33. If a body is subjected to uniform pressure, the stress developed is:

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

34. The reciprocal of Bulk Modulus is called:

A) Compressibility B) Elasticity C) Rigidity D) Plasticity

35. For most materials, the elastic limit is typically:

A) Lower than the yield point B) Higher than the yield point C) Equal to the breaking point D) Equal to the ultimate tensile strength

36. Which of the following is a dimensionless quantity?

A) Strain B) Stress C) Young's Modulus D) Pressure

37. When a rubber band is stretched and released, it returns to its original shape because it is within its:

A) Elastic limit B) Plastic limit C) Breaking point D) Yield point

38. If the stress exceeds the elastic limit, the material will:

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

39. The phenomenon of a material regaining its original shape and size after the removal of the deforming force is called:

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

40. Which of the following is NOT a type of elastic modulus?

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

41. Poisson's ratio relates:

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

42. The region of the stress-strain curve after the yield point up to fracture is known as the:

A) Plastic region B) Elastic region C) Proportional region D) Hookean region

43. A spring obeys Hooke's Law. If you double the force applied to the spring, its extension will:

A) Double B) Halve C) Remain the same D) Quadruple

44. The slope of the stress-strain curve in the elastic region represents:

A) The modulus of elasticity B) The strain C) The stress D) The ultimate strength

45. Which factor does NOT affect the elastic limit of a material?

A) Temperature B) Impurities C) Crystal structure D) The applied force itself (beyond the elastic limit)

46. If a material is stressed beyond its elastic limit, it exhibits:

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

47. The stress required to break a unit area of a material is called:

A) Breaking stress B) Yield stress C) Elastic stress D) Ultimate tensile strength

48. What is the relationship between stress, strain, and Young's modulus (Y) within the elastic limit?

A) Stress = Y * Strain B) Strain = Y * Stress C) Y = Strain / Stress D) Stress + Strain = Y

49. Which type of deformation is temporary and reversible?

A) Elastic deformation B) Plastic deformation C) Permanent deformation D) Fracture

50. The stress–strain curve for a perfectly elastic material would be a:

A) Straight line passing through the origin B) Curved line C) Horizontal line D) Vertical line

Elastic behaviour, stress–strain and Hooke’s law - Online Test

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