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 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 11 Mechanical Properties Of Solids Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The lower surface of a cube is fixed. On its upper surface, force is applied at an angle of 30$^\circ$ from its surface. The change will be in its A) Shape. B) Size. C) Volume. D) Both shape and size. Show Answer Correct Answer: D) Both shape and size. 2. The depth at which acceleration due to gravity(g) is half of that at the surface of earth is A) $2R$. B) $\frac{R}{4}$. C) $\frac{R}{2}$. D) $\frac{3R}{4}$. Show Answer Correct Answer: C) $\frac{R}{2}$. 3. Coefficient of kinetic friction is maximum when A) Aluminium moves on steel. B) Copper moves on steel. C) Rubber moves on concrete. D) Teflon moves on Teflon. Show Answer Correct Answer: D) Teflon moves on Teflon. 4. What happens when the stress applied to the body is increased beyond the maximum value and is removed after some time? A) The body cannot return to its original position. B) The body will oppose the stress. C) The body will come back to its original position. D) The body becomes hot. Show Answer Correct Answer: A) The body cannot return to its original position. 5. The position vector of a particle is A) The vector drawn from the origin to the particle's location. B) The vector representing angular momentum. C) The vector perpendicular to the displacement. D) The vector equal to the particle's velocity. Show Answer Correct Answer: A) The vector drawn from the origin to the particle's location. 6. The acceleration due to gravity is maximum at which location? A) Below Earth surface. B) Above Earth surface. C) On Earth surface. D) None. Show Answer Correct Answer: C) On Earth surface. 7. Hardness of thin hard sample is measured by A) Brinell Hardness Test. B) Knoop Hardness Test. C) All the above. D) None of the above. Show Answer Correct Answer: B) Knoop Hardness Test. 8. Which state of matter can be easily compressed (squashed)? A) Solids. B) Liquids. C) Gases. D) None of the above. Show Answer Correct Answer: C) Gases. 9. ..... is an example of elastomer A) Copper. B) Gold. C) Rubber. D) Glass. Show Answer Correct Answer: C) Rubber. 10. A wire can support a load Mg without breaking. It is cut into two equal parts. The maximum load that each part can support is A) 2 Mg. B) Mg. C) Mg/4. D) Mg/2. Show Answer Correct Answer: B) Mg. 11. A uniform cable of length L is cut into two equal lengths of L/2 each. The maximum load that one of the wires can support is A) Double the previous value. B) One-fourth of previous value. C) Same as previous value. D) Half the previous value. Show Answer Correct Answer: C) Same as previous value. 12. The strain energy per unit volume is equal to ..... A) $\frac{1}{2}\left(stress\right)^2Y$. B) $\frac{1}{2}\\frac{\left(strain\right)^2}{Y}$. C) $\frac{1}{2}\left(stress\right)\left(strain\right)$. D) $\frac{1}{2}\left(load\right)\left(extension\right)$. Show Answer Correct Answer: C) $\frac{1}{2}\left(stress\right)\left(strain\right)$. 13. If S is stress and Y is young's modulus of material of a wire, the energy stored in the wire per unit volume is A) S/2Y. B) 2 S$^{2}$ Y. C) S$^{2}$/2Y. D) 2Y/S$^{2}$. Show Answer Correct Answer: C) S$^{2}$/2Y. 14. Measures amount of stress that can be handled from pulling before breaking. A) Elasticity. B) Tensile strength. C) Ductility. D) Brittleness. E) Hardness. Show Answer Correct Answer: B) Tensile strength. 15. Explain the difference between elastic strain and plastic strain. A) Elastic strain is reversible deformation, while plastic strain is permanent deformation. B) Plastic strain can be reversed under certain conditions. C) Elastic strain is always permanent deformation. D) Elastic strain occurs only in metals. Show Answer Correct Answer: A) Elastic strain is reversible deformation, while plastic strain is permanent deformation. 16. You push your finger into a ball of play-doh and it keeps its new shape. This is an example of A) Plasticity. B) Hardness. C) Elasticity. D) Tensile strength. Show Answer Correct Answer: A) Plasticity. 17. The cause of elasticity of a substance is A) Low internal restoring force. B) Large internal restoring force. C) Deformation. D) Less distance between the molecules. Show Answer Correct Answer: B) Large internal restoring force. 18. When a certain weight is suspended from a long uniform wire, its length increases by one cm. If the same weight is suspended from another wire of the same material and length but having a diameter half of the first one then the increase in length will be A) 8 cm. B) 4 cm. C) 0.5 cm. D) 2 cm. Show Answer Correct Answer: B) 4 cm. 19. The length of a uniform wire is increased by 1 mm on application of a given load. The extension produced when same load is applied in a uniform wire of the same material, but of length and radius twice that of the first is (in mm) A) 2. B) 4. C) 0.5. D) 0.25. Show Answer Correct Answer: C) 0.5. 20. Two wires of the same length and material but different radii r$_{1}$ and r$_{2}$ are suspended from a rigid support both carry the same load at the lower end. The ratio of the stress developed in the second wire to that developed in the first wire is- A) $\frac{r_1}{r_2}$. B) $\left[\frac{r_1}{r_2}\right]^{\frac{1}{2}}$. C) $\left[\frac{r_1}{r_2}\right]^{\frac{5}{2}}$. D) $\frac{r_1^2}{r_{2^{ }}^2}$. Show Answer Correct Answer: D) $\frac{r_1^2}{r_{2^{ }}^2}$. 21. Tendency to crack or break before stretching much. A) Ductility. B) Hardness. C) Elasticity. D) Brittleness. E) Tensile strength. Show Answer Correct Answer: D) Brittleness. 22. Acceleration due to gravity is ..... on the mass of the object. A) Dependent. B) Independent. C) All the above. D) None of the above. Show Answer Correct Answer: B) Independent. 23. Modulus of elasticity is the ratio of ..... A) Strain to constant. B) Stress to constant. C) Strain to stress. D) Stress to strain. Show Answer Correct Answer: D) Stress to strain. 24. When the weight of an object in contact with a surface is doubled, the value of the coefficient of static friction ..... A) Is doubled. B) Becomes zero. C) Remains unchanged. D) Becomes half the initial value. Show Answer Correct Answer: C) Remains unchanged. 25. Young's modulus is property of A) Solids. B) Solids and liquids. C) Solids or liquids. D) Gases. Show Answer Correct Answer: A) Solids. 26. What is the strain in a wire cable of original length 50 m whose length is increases by 2.5 cm when a load is lifted? A) 3x10$^{-2}$. B) 10x10$^{-1}$. C) 2x10$^{-3}$. D) 5x10$^{-4}$. Show Answer Correct Answer: D) 5x10$^{-4}$. 27. The graph of stress against strain is always A) Parabola. B) Straight line in elastic region. C) Straight line. D) Parabola in elastic region. Show Answer Correct Answer: B) Straight line in elastic region. 28. When a block of mass M is suspended by a long wire of length L the length of the wire becomes (L+l). The elastic potential energy of the wire is A) 1/2MgL. B) 1/2Mgl. C) Mgl. D) MgL. Show Answer Correct Answer: B) 1/2Mgl. 29. The loss of elasticity in a material due to repeated application of deforming forces is called A) Elastic Hysteresis. B) Elastic after effect. C) Plasticity. D) Elastic fatigue. Show Answer Correct Answer: D) Elastic fatigue. 30. A physical property of a substance is ..... (fill the space) A) The property that can be observed or measured without changing the substance. B) The property that cannot be observed or measured without changing the substance. C) All the above. D) None of the above. Show Answer Correct Answer: A) The property that can be observed or measured without changing the substance. 31. Use of ball bearings converts A) Kinetic friction to rolling friction. B) Kinetic friction to static friction. C) Rolling friction to Kinetic friction. D) Static friction to kinetic friction. Show Answer Correct Answer: A) Kinetic friction to rolling friction. 32. The Bulk modulus for an incompressible liquid is A) Between 0 to 1. B) Infinity. C) Zero. D) Unity. Show Answer Correct Answer: B) Infinity. 33. Stress is a ratio of ..... A) Force to Distance. B) Distance to Force. C) Force to Area. D) Area to Force. Show Answer Correct Answer: C) Force to Area. 34. The value of acceleration due to gravity is maximum at the ..... A) Equator. B) Centre of earth. C) Poles. D) None of these. Show Answer Correct Answer: C) Poles. 35. A body weighs 980 N on Earth. What is its mass? ( $g=9.8\, \text{m s}^{-2}$ A) 1 kg. B) 980 kg. C) 9.8 kg. D) 100 kg. Show Answer Correct Answer: D) 100 kg. 36. Which one of the following is an ohmic conductor? A) Transistor. B) Pn junction diode. C) LED. D) Copper. Show Answer Correct Answer: D) Copper. 37. Choose the correct dimensional formula for force. A) $M^{-1}L^{3}T^{-2}$. B) $MT^{-2}$. C) $MLT^{-2}$. D) $ML^{2}T^{-2}$. Show Answer Correct Answer: C) $MLT^{-2}$. 38. A wire is stretched through 1 mm by certain load. The extension produced in the wire of same material with double the length and double the radius by the same load will be: A) 2 mm. B) 0.5 mm. C) 1 mm. D) 4 mm. Show Answer Correct Answer: B) 0.5 mm. 39. Discuss the properties of solids that affect their mechanical behavior. A) Color and texture. B) Thermal conductivity. C) Elasticity, plasticity, hardness, toughness, ductility, brittleness, and strength. D) Electrical resistance. Show Answer Correct Answer: C) Elasticity, plasticity, hardness, toughness, ductility, brittleness, and strength. 40. In magnitude hydraulic stress is equal to: A) Restoring Force. B) Hydraulic excess pressure. C) Hydraulic force. D) Hydraulic Strain. Show Answer Correct Answer: B) Hydraulic excess pressure. 41. A fluid's resistance to flow is its A) Density. B) Buoyancy. C) Viscosity. D) Pressure. Show Answer Correct Answer: C) Viscosity. 42. Which state of matter has tightly packed molecules? A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: A) Solid. 43. List the types of strain that can occur in materials. A) Compressive strain. B) Torsional strain. C) Bending strain. D) Elastic strain, plastic strain, thermal strain, shear strain. Show Answer Correct Answer: D) Elastic strain, plastic strain, thermal strain, shear strain. 44. The pressure of a liquid in the tube will increase if the velocity of the liquid will be A) Increased. B) Decreased. C) No effect of velocity. D) None of these. Show Answer Correct Answer: B) Decreased. 45. The ice point of water in Fahrenheit is A) 0 $^\circ$F. B) 32 $^\circ$F. C) 100 $^\circ$F. D) 212 $^\circ$F. Show Answer Correct Answer: B) 32 $^\circ$F. 46. Two wires made of same material are subjected to forces in the ratio 1:4. Their lengths are in the ratio 2:1 and diameters in the ratio 1:3. What is the ratio of their extensions: A) 2:9. B) 1:2. C) 9:2. D) 2:7. Show Answer Correct Answer: C) 9:2. 47. A sample of metal weights 210 grams in air, 180 grams in water and 120 grams in an unknown liquid. Then:- A) Density of metal is 4 times the density of the unknown liquid. B) The density of metal is 7 g/cm3. C) The metal will float in water. D) The density of metal is 3 g/cm3. Show Answer Correct Answer: B) The density of metal is 7 g/cm3. 48. For ductile materials, the ultimate tensile strength and fracture point is ..... A) Far apart. B) Very close. C) All the above. D) None of the above. Show Answer Correct Answer: A) Far apart. 49. The reciprocal of bulk modulus is called ..... A) Resistivity. B) Conductivity. C) Shear modulus. D) Compressibility. Show Answer Correct Answer: D) Compressibility. 50. Bulk modulus measures the resistance offered by gases, liquids or solids while an attempt is made to change the ..... A) Volume. B) Length. C) Area. D) Shape. Show Answer Correct Answer: A) Volume. 51. Two soap bubbles each of radius r are touching each other. The radius of curvature of the common surface will be: A) 2r. B) R. C) Infinite. D) R/2. Show Answer Correct Answer: C) Infinite. 52. The property which resists the relative motion between two surfaces in contact is A) Centripetal force. B) Friction. C) Pressure. D) Momentum. Show Answer Correct Answer: B) Friction. 53. Air is more elastic than water. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 54. The property of a material which enables it to resist plastic deformation is ..... A) Elasticity. B) Plasticity. C) Ductility. D) Hardness. Show Answer Correct Answer: D) Hardness. 55. In plastic flow region for the stress-strain curve for a wire ..... A) A large stress brings about a small change in strain. B) A large stress brings about a large change in strain. C) A small stress brings about a small change in strain. D) A small stress brings about a large change in strain. Show Answer Correct Answer: D) A small stress brings about a large change in strain. 56. 16 cm3 of water flows per second through a capillary tube of radius a cm and of length 'l' cm when connectedto a pressure head of h cm of water. If a tube of the same length and radius a/2 cm is connected to the samepressure head, the quantity of water flowing through the tube per second will be(in cc):- A) 8. B) 4. C) 16. D) 1. Show Answer Correct Answer: D) 1. 57. If the % elongation of a sample is found to be 10 A) Material is ductile. B) Material is brittle. C) All the above. D) None of the above. Show Answer Correct Answer: A) Material is ductile. 58. Escape velocity is independent on A) The mass of the object to be projected. B) The mass of the planet. C) All the above. D) None of the above. Show Answer Correct Answer: A) The mass of the object to be projected. 59. The SI unit of longitudinal strain is: A) Newton (N). B) Pascal (Pa). C) Unitless. D) Metre (m). Show Answer Correct Answer: C) Unitless. 60. A property is ..... A) A way to describe matter. B) The amount of space something takes up. C) Anything that takes up space. D) None of the above. Show Answer Correct Answer: A) A way to describe matter. ← 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 2Class 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