This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 11 Mechanical Properties Of Solids – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 11 Mechanical Properties Of Solids Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A hole is made in a cotainer filled with water upto height H at height h from the bottom of the cotainer. Velocity of efflux from a hole is given by A) $\sqrt[]{2gH}$. B) $\sqrt[]{2gh}$. C) $\sqrt[]{2g\left(H-h\right)}$. D) $2\\sqrt[]{gh}$. Show Answer Correct Answer: C) $\sqrt[]{2g\left(H-h\right)}$. 2. Strain is defined as ..... A) Original dimension. B) Original dimension per unit change in dimension. C) Change in dimension. D) Change in dimension per unit original dimension. Show Answer Correct Answer: D) Change in dimension per unit original dimension. 3. A fixed volume of iron is drawn into a wire of length L. The extension produced in this wire by a constant force F is proportional to:- A) L. B) 1/L. C) 1/L$^{2}$. D) L$^{2}$. Show Answer Correct Answer: D) L$^{2}$. 4. Which of the following is a practical example of Hooke's Law in everyday life? A) A mattress that compresses when someone lies on it. B) A bicycle tire being inflated with air. C) A car accelerating on a highway. D) A piece of clay being molded by hand. Show Answer Correct Answer: A) A mattress that compresses when someone lies on it. 5. The limiting force of friction is the ..... A) Maximum value of kinetic friction. B) Maximum value of static friction. C) Minimum value of kinetic friction. D) Minimum value of static friction. Show Answer Correct Answer: B) Maximum value of static friction. 6. How do shear stress and normal stress influence material behavior under load? A) Shear stress can cause deformation along a plane, while normal stress can lead to compression or tension. B) Shear stress is only applicable in solid materials, whereas normal stress applies to fluids. C) Normal stress is responsible for twisting, while shear stress causes bending. D) Shear stress and normal stress are identical in their effects on materials. Show Answer Correct Answer: A) Shear stress can cause deformation along a plane, while normal stress can lead to compression or tension. 7. What are the different types of stress in materials? A) Static, dynamic, and thermal stress. B) Radial, axial, and lateral stress. C) Elastic, plastic, and yield stress. D) Tensile, compressive, shear, bending, and torsional stress. Show Answer Correct Answer: D) Tensile, compressive, shear, bending, and torsional stress. 8. Describe the stress-strain curve and its significance in material science. A) The stress-strain curve only applies to metals and not to polymers. B) The curve is irrelevant for understanding material fatigue and failure. C) It shows the relationship between temperature and material density. D) It illustrates how materials respond to stress, by the elastic and plastic behavior, yield strength. Show Answer Correct Answer: D) It illustrates how materials respond to stress, by the elastic and plastic behavior, yield strength. 9. Poisson's ratio is the ratio of ..... A) Linear strain to Lateral stran. B) Lateral stress to Linear stress. C) Lateral strain to Linear strain. D) Linear stress to Lateral stress. Show Answer Correct Answer: C) Lateral strain to Linear strain. 10. Hooke's Law states that within elastic limit ..... A) Stress $\alpha$ strain. B) Constant $\alpha$ strain. C) Starin $\alpha$ stress. D) Constant $\alpha$ stress. Show Answer Correct Answer: A) Stress $\alpha$ strain. 11. Tensile strain is defined as A) $\frac{h}{\sin\theta}$. B) $\frac{F}{A}$. C) $\frac{\Delta l}{L}$. D) $\frac{\Delta V}{V}$. Show Answer Correct Answer: C) $\frac{\Delta l}{L}$. 12. For a metal wire, Hooke's Law is valid upto ..... A) Breaking point. B) Yield point. C) Proportinality limit. D) Elastic limit. Show Answer Correct Answer: C) Proportinality limit. 13. A 2 m long rod of radius 1 cm which is fixed from one end is given a twist of 0.8 radians. The shear strain developed will be A) 0.002. B) 0.004. C) 0.008. D) 0.016. Show Answer Correct Answer: B) 0.004. 14. Which of these common fluids would have the highest viscosity? A) Milk. B) Honey. C) Water. D) Mustard. Show Answer Correct Answer: B) Honey. 15. Which of the following is a property of amorphous solids? A) Sharp melting point. B) Irregular arrangement of atoms. C) Long-range order. D) Definite geometric shape. Show Answer Correct Answer: B) Irregular arrangement of atoms. 16. Resistance to flow A) Viscosity. B) Hardness. C) Malleability. D) Brittleness. E) Ductility. Show Answer Correct Answer: A) Viscosity. 17. What is the significance of the elastic limit in the context of the stress-strain curve? A) The elastic limit indicates the maximum stress that a material can withstand without permanent deformation. B) The elastic limit is the point where the material begins to yield and deform plastically. C) The elastic limit is the same as the yield strength of the material. D) The elastic limit is the point at which the material breaks. Show Answer Correct Answer: A) The elastic limit indicates the maximum stress that a material can withstand without permanent deformation. 18. Choose the correct dimensional formula for the universal gravitational constant G. A) $M^{-1}L^{3}T^{-2}$. B) $MLT^{-2}$. C) $M^{0}L^{2}T^{-2}$. D) $ML^{3}T^{-2}$. Show Answer Correct Answer: A) $M^{-1}L^{3}T^{-2}$. 19. Which of the following is a disadvantage of friction? A) Holding an object in the hand. B) Walking. C) Production of heat in machines. D) Braking of vehicles. Show Answer Correct Answer: C) Production of heat in machines. 20. The spring balance does not read properly after its long use, because A) The elasticity of spring increases. B) The elasticity decreases. C) Its plastic power decreases. D) Its plastic power increases. Show Answer Correct Answer: B) The elasticity decreases. 21. What is bulk modulus and how does it relate to volume change in materials? A) Bulk modulus indicates a material's color change under stress. B) Bulk modulus measures a material's thermal conductivity. C) Bulk modulus is the same as tensile strength. D) Bulk modulus is a measure of a material's resistance to volume change under pressure. Show Answer Correct Answer: D) Bulk modulus is a measure of a material's resistance to volume change under pressure. 22. Elastic hysteresis is A) Stress is equal to strain. B) Lagging of stress behind strain. C) Lagging of strain behind stress. D) Stress/strain=constant. Show Answer Correct Answer: C) Lagging of strain behind stress. 23. Which of the following affects the elasticity of a substance? A) Change in Temperature. B) Impurity of substance. C) Hammering and annealing. D) All of these. Show Answer Correct Answer: D) All of these. 24. Which property of solids is measured by the Mohs scale? A) Density. B) Elasticity. C) Conductivity. D) Hardness. Show Answer Correct Answer: D) Hardness. 25. The bulk modulus of a material of a wire 1m long is B. So the bulk modulus of a 2m long wire of same material will be A) 2/B. B) B. C) 2B. D) B/2. Show Answer Correct Answer: B) B. 26. An block of 'X' kg mass is placed on a horizontal table. The force required to just move the block is 60 N.If the coefficient of static friction is 0.12, then the value of 'X' is ..... (take the value of acceleration due to gravity as $10\\frac{m}{s^2}$ A) 50. B) 0.5. C) 5. D) 500. Show Answer Correct Answer: A) 50. 27. Young's modulus is maximum for A) Steel. B) Copper. C) Lead. D) Brass. Show Answer Correct Answer: A) Steel. 28. Which of the following solids is likely to have the highest melting point? A) Wax. B) Sulfur. C) Iron. D) Ice. Show Answer Correct Answer: C) Iron. 29. The ratio of linear stress to linear strain is called A) Young's modulus. B) Bulk modulus. C) Rigidity modulus. D) None of the above. Show Answer Correct Answer: A) Young's modulus. 30. Which of the following solids is an example of a crystalline solid? A) Glass. B) Salt. C) Rubber. D) Plastic. Show Answer Correct Answer: B) Salt. 31. Compressibility is reciprocal of A) Bulk modulus. B) Shear modulus. C) Young's modulus. D) Modulus of elasticity. Show Answer Correct Answer: A) Bulk modulus. 32. Hardness is ..... A) Ability to resist fracturing. B) Ability to resist permanent deformation. C) Ability to break the moment external force is applied. D) None of the above. Show Answer Correct Answer: B) Ability to resist permanent deformation. 33. 1 N/m$^{2}$ = ..... dyne /cm$^{2}$ A) 100. B) 1000. C) 1. D) 10. Show Answer Correct Answer: D) 10. 34. Substances which can be stretched to cause permanent large strains are called: A) Ductile. B) Brittle. C) Elastomers. D) Plastic. Show Answer Correct Answer: A) Ductile. 35. Young's modulus of a perfectly rigid body is A) Zero. B) One. C) Infinite. D) None of the above. Show Answer Correct Answer: C) Infinite. 36. Three resistors 20 $\Omega$, 30 $\Omega$, and 40 $\Omega$ are connected in series, and the combination is connected with 10 $\Omega$ resistance in parallel. Calculate the equivalent resistance. A) 18 $\Omega$. B) 8 $\Omega$. C) 9 $\Omega$. D) 10 $\Omega$. Show Answer Correct Answer: C) 9 $\Omega$. 37. There will be no volume change of the material if Poisson's ratio is A) Negetive. B) 0. C) 1. D) 0.5. Show Answer Correct Answer: D) 0.5. 38. State true or false:Strain has no unit and dimension. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 39. Out of steel and rubber, which is more elastic A) Steel. B) Rubber. C) Both are equally elastic. D) None. Show Answer Correct Answer: A) Steel. 40. Bulk modulus is defined as A) The ratio of volumetric stress to volumetric strain. B) The ratio of shear stress to shear strain. C) The product of pressure and volume. D) The change in volume per unit mass. Show Answer Correct Answer: A) The ratio of volumetric stress to volumetric strain. 41. How many significant figures are in the number 0.1470? A) 2. B) 3. C) 5. D) 4. Show Answer Correct Answer: D) 4. 42. The dimensions of stress are ..... A) $\left[L^1M^{-1}T^{-1}\right]$. B) $\left[L^2M^{-1}T^{-2}\right]$. C) $\left[L^{-1}M^1T^2\right]$. D) $\left[L^{-1}M^1T^{-2}\right]$. Show Answer Correct Answer: D) $\left[L^{-1}M^1T^{-2}\right]$. 43. The Young's modulus of most solids A) Decrease with increase in temperature. B) Increase with increase in temperature. C) First increase and then decrease. D) Is independent of temperature. Show Answer Correct Answer: A) Decrease with increase in temperature. 44. The property which resist the relative motion between two surface in contact is called A) Static friction. B) Kinetic friction. C) Rolling friction. D) Friction. Show Answer Correct Answer: D) Friction. 45. There are two identical wires with Young's moduli Y1 and Y2 respectively such that Y1> Y2. If they are hung from a rigid support and same weight is applied to them at their free ends then A) First wire will constrict more. B) Elongation in the second wire will be more. C) Elongation in the wires will be same. D) Elongation in the first wire will be more. Show Answer Correct Answer: B) Elongation in the second wire will be more. 46. When two surfaces in contact become more smooth, the area of contact between the surfaces ..... A) Remains unchanged. B) Decreases. C) Increases. D) None of the above. Show Answer Correct Answer: C) Increases. 47. Identify the correct expression for the coefficient of linear expansion $\alpha$ A) $\alpha=\dfrac{L_0}{\Delta L\, \Delta T}$. B) $\alpha=\dfrac{\Delta L\, \Delta T}{L_0}$. C) $\alpha=\dfrac{\Delta T}{L_0\, \Delta L}$. D) $\alpha=\dfrac{\Delta L}{L_0\, \Delta T}$. Show Answer Correct Answer: D) $\alpha=\dfrac{\Delta L}{L_0\, \Delta T}$. 48. Four uniform wires described below are made of the same material. The wire which will have the largest extension, for a given tension is A) L = 50 cm, diameter = 0.5 mm. B) L = 300 cm, diameter = 3.0 mm. C) L = 200 cm, diameter = 2.0 mm. D) L = 100 cm, diameter = 1.0 mm. Show Answer Correct Answer: A) L = 50 cm, diameter = 0.5 mm. 49. How many significant figures are in the number 65.7? A) 2. B) 4. C) 5. D) 3. Show Answer Correct Answer: D) 3. 50. Acceleration due to gravity at the surface of earth is given by A) $g=\\frac{GM}{r^2}$. B) $g=\\frac{GM}{r}$. C) $g=\\frac{GMm}{r}$. D) $g=\frac{GMm}{r^2}$. Show Answer Correct Answer: A) $g=\\frac{GM}{r^2}$. 51. Milk takes the shape of its container because it is a: A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: B) Liquid. 52. Airfoil wing design is an example of applying A) Bernoulli's Principle. B) Pascal's Principle. C) Charles' Law. D) Henry's Law. E) Boyle's Law. Show Answer Correct Answer: A) Bernoulli's Principle. 53. An example of elastomer is A) Mud. B) Rubber. C) Steel. D) Wax. Show Answer Correct Answer: B) Rubber. 54. What is the main reason metals are good conductors of electricity? A) They have ionic bonds. B) They have tightly bound electrons. C) They have free electrons. D) They have high density. Show Answer Correct Answer: C) They have free electrons. 55. Toughness is the ability to absorb energy and: A) Twist. B) Dent. C) Bend. D) Resist fracture or breaking. Show Answer Correct Answer: D) Resist fracture or breaking. 56. Ability to be pounded into thin sheets. A) Tensile strength. B) Hardness. C) Malleability. D) Brittleness. E) Ductility. Show Answer Correct Answer: C) Malleability. 57. What does the spring constant (k) represent in Hooke's Law, and how does it affect the behavior of a spring? A) The spring constant (k) represents the stiffness of the spring; a higher k value indicates a stiffer spring. B) The spring constant (k) is irrelevant to the spring's behavior. C) The spring constant (k) indicates the length of the spring. D) The spring constant (k) is the mass of the spring. Show Answer Correct Answer: A) The spring constant (k) represents the stiffness of the spring; a higher k value indicates a stiffer spring. 58. What is the formula for calculating Young's Modulus? A) E = velocity / time. B) E = stress / strain. C) E = mass / volume. D) E = force / area. Show Answer Correct Answer: B) E = stress / strain. 59. A uniform metallic wire is stretched by suspending a weight from it. If $\alpha$ A) $Y\alpha$. B) $2Y\alpha$. C) $\frac{Y\alpha^2}{2}$. D) $\frac{\alpha^2}{2Y}$. Show Answer Correct Answer: C) $\frac{Y\alpha^2}{2}$. 60. ..... is the ability of a material to resist fracturing, when a force is applied to it A) Elastomer. B) Hardness. C) Hysteresis. D) Toughness. Show Answer Correct Answer: D) Toughness. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Physics (Part Ii) Chapter 11 Mechanical Properties Of Solids Quiz 1Class 11 Physics (Part Ii) Chapter 11 Mechanical Properties Of Solids Quiz 3Class 11 Physics (Part Ii) Chapter 11 Mechanical Properties Of Solids Quiz 4Class 11 Physics (Part Ii) Chapter 13 Thermal Properties Of Matter QuizClass 11 Physics (Part Ii) Chapter 14 Thermodynamics QuizClass 11 Physics (Part Ii) Chapter 15 Kinetic Theory QuizClass 11 Physics (Part Ii) Chapter 16 Oscillations QuizClass 11 Physics (Part Ii) Chapter 17 Waves Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books