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 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 11 Mechanical Properties Of Solids Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Modulus of rigidity is minimum in ..... A) Copper. B) Gold. C) Lead. D) Steel. Show Answer Correct Answer: C) Lead. 2. A long spring is stretched by 2 cm and its P.E is V. If the spring is stretched by 10 cm its P.E will be A) 25V. B) V/25. C) 5V. D) V/5. Show Answer Correct Answer: A) 25V. 3. The forces of attraction between molecules of two different materials are called as ..... A) Gravitational forces. B) Adhesive forces. C) Coulomb forces. D) Cohesive forces. Show Answer Correct Answer: B) Adhesive forces. 4. A balloon 's volume decreases by 1% when its pressure is increased by 80%. So its Bulk modulus is A) 1 unit. B) 80 unit. C) 1/80 unit. D) 800 unit. Show Answer Correct Answer: B) 80 unit. 5. The modulus of elasticity corresponding to change in volume is called as ..... A) Bulk modulus. B) Modulus of rigidity. C) Modulus of length. D) Young's modulus. Show Answer Correct Answer: A) Bulk modulus. 6. The ratio of $\frac{F}{A\theta}$ A) Poisson's ratio. B) Young's Modulus. C) Modulus of rigidity. D) Bulk Modulus. Show Answer Correct Answer: C) Modulus of rigidity. 7. Greater the angle of inclination of the stress strain curve less is the elasticity. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 8. Which of the following is a characteristic property of solids? A) Definite shape and volume. B) High compressibility. C) Ability to flow. D) No definite shape. Show Answer Correct Answer: A) Definite shape and volume. 9. According to Hooke's law of elasticity, if stress is increased, then the ratio of stress to strain: A) Increases. B) Remains constant. C) Decreases. D) Becomes zero. Show Answer Correct Answer: B) Remains constant. 10. Excess pressure inside an air bubble formedin water is A) 4S/R. B) Po + 4S/R. C) Po. D) 2S/R. Show Answer Correct Answer: D) 2S/R. 11. When force is acting parallel to surface then the corresponding stress is known as A) Direct stress. B) Compressive stress. C) Tensile stress. D) Shear Stress. Show Answer Correct Answer: D) Shear Stress. 12. The restoring force per unit area is known as: A) Elasticity. B) Stress. C) Plasticity. D) Strain. Show Answer Correct Answer: B) Stress. 13. In which of the following processes does a solid directly change into a gas? A) Sublimation. B) Condensation. C) Freezing. D) Melting. Show Answer Correct Answer: A) Sublimation. 14. According to Hooke's law for a linear spring, which mathematical expression correctly relates the restoring force and displacement? A) $F=\dfrac{x}{k}$. B) $F=\dfrac{k}{x}$. C) $F=ma$. D) $F=-kx$. Show Answer Correct Answer: D) $F=-kx$. 15. What happens to the particles in a solid as it is heated? A) They stop moving. B) They form a regular pattern. C) They move closer together. D) They move further apart. Show Answer Correct Answer: D) They move further apart. 16. Find the derivative of the function $x^5$ A) $6x^5$. B) $x^5$. C) $5x^5$. D) $5x^4$. Show Answer Correct Answer: D) $5x^4$. 17. What will be the rate of flow of the liquid (meter cube/s) in a tube of radius 2 m if liquid is flowing in this tube with velocity $\frac{1}{\pi}$ A) 2. B) $\pi$. C) 4. D) 2 $\pi$. Show Answer Correct Answer: C) 4. 18. If a force of 0.98 N is applied to a mass of 0.25kg. The coefficient of friction is ..... (g=9.8 m/s$^{2}$) A) 0.2. B) 0.5. C) 0.3. D) 0.4. Show Answer Correct Answer: D) 0.4. 19. Acceleration due to gravity ..... with height and ..... with depth. A) Increases, decreases. B) Increases, increases. C) Decreases, increases. D) Decreases, decreases. Show Answer Correct Answer: D) Decreases, decreases. 20. The ability to be stretched into a wire A) Tensile strength. B) Hardness. C) Malleability. D) Brittleness. E) Ductility. Show Answer Correct Answer: E) Ductility. 21. The length of a metal wire is L when the tension is F and xL when the tension is yF. Then the natural length of the wire is A) (y-x)L/(y-1). B) (x-y)L/(x+1). C) (y-x)L/(y+1). D) (x-y)L/(x-1). Show Answer Correct Answer: A) (y-x)L/(y-1). 22. Small insects can move over the surface of water because of A) Surface tension. B) Less pressure. C) Their very less weight. D) Pascal's law. Show Answer Correct Answer: A) Surface tension. 23. Two wires A and B of same material have radii 2:1 and lengths in the ratio 4:1. The ratio of the normal forces required to produce the same change in the lengths of these two wires is A) 2:1. B) 1:1. C) 1:2. D) 1:4. Show Answer Correct Answer: B) 1:1. 24. Which experiment can be used to demonstrate the brittleness of a solid? A) Bending a metal rod. B) Stretching a rubber band. C) Dropping a glass object. D) Compressing a sponge. Show Answer Correct Answer: C) Dropping a glass object. 25. In Searl's apparatus to find Young's modulus. If length of wire and radius both are doubled then the value of (Young's modulus) will become A) 4 times. B) Remains same. C) 2 times. D) Half. Show Answer Correct Answer: B) Remains same. 26. SECTION B-Attempt any EIGHT:How many significant figures are in the number 2607? A) 4. B) 2. C) 5. D) 3. Show Answer Correct Answer: A) 4. 27. If a force of 4 N is applied across a face of a cube whose sides are 2mm each then stress produced is A) 1. B) 16N/m$^{2}$. C) 10$^{6}$N/m$^{2}$. D) 4. Show Answer Correct Answer: C) 10$^{6}$N/m$^{2}$. 28. The modulus of elasticity corresponding to change in length is called as ..... A) Bulk modulus. B) Modulus of length. C) Modulus of rigidity. D) Young's modulus. Show Answer Correct Answer: D) Young's modulus. 29. Select the correct answer:What is the magnitude of the vector $\mathbf{A}=3\mathbf{i}+\mathbf{j}-2\mathbf{k}$ A) $\sqrt{13}$. B) 4. C) 3. D) $\sqrt{14}$. Show Answer Correct Answer: D) $\sqrt{14}$. 30. Dimensions of stress is A) $ML^{-1}T^{-2}$. B) $MLT^{-2}$. C) $ML^{-2}T^{-2}$. D) $ML^2T^{-2}$. Show Answer Correct Answer: A) $ML^{-1}T^{-2}$. 31. Hooke's law states A) Stress=Y (strain)$^{2}$. B) Stress= (1/2)Y. C) Strain=(stress)$^{2}$/Y. D) Stress/strain=constant. Show Answer Correct Answer: D) Stress/strain=constant. 32. As temperature increases, viscosity A) Decreases. B) Increases. C) Stays the same. D) None of the above. Show Answer Correct Answer: A) Decreases. 33. Which of the following quantities is dimensionless? A) Strain. B) Pressure. C) Velocity. D) Force. Show Answer Correct Answer: A) Strain. 34. Hydraulic lifts are an example of applying A) Bernoulli's Principle. B) Boyle's Law. C) Charles' Law. D) Pascal's Principle. E) Henry's Law. Show Answer Correct Answer: D) Pascal's Principle. 35. Poisson's ratio cannot have the value: A) 0.7. B) 0.1. C) 0.5. D) 0.2. Show Answer Correct Answer: A) 0.7. 36. Change in dimensions is known as A) Deformation. B) Strain. C) Contraction. D) Formation. Show Answer Correct Answer: A) Deformation. 37. When a wire is stretched ..... A) Its length decreases and diameter increases. B) Its length and diameter, both increases. C) Its length and diameter, both decreases. D) Its length increases and diameter decreases. Show Answer Correct Answer: D) Its length increases and diameter decreases. 38. Find the derivative of the function $x^6 +\cos x$ A) $6x^5 + \sin x$. B) $6x^6-\sin x$. C) $6x^5-\sin x$. D) $x^6-\sin x$. Show Answer Correct Answer: C) $6x^5-\sin x$. 39. What does the slope of the linear portion of the stress-strain curve represent? A) The thermal conductivity of the material. B) The ultimate tensile strength of the material. C) The modulus of elasticity (Young's modulus) of the material. D) The yield strength of the material. Show Answer Correct Answer: C) The modulus of elasticity (Young's modulus) of the material. 40. According to Pascal, pressure applied to a fluid A) Decreases as it moves through the fluid. B) Fluctuates as it is transmitted throughout the fluid. C) Is transmitted unchanged throughout the fluid. D) Increases as it moves through the fluid. Show Answer Correct Answer: C) Is transmitted unchanged throughout the fluid. 41. Combination of lattice and basis potentially made: A) Crystal structure. B) Bravais lattice. C) Primitive cell. D) Simple cubic. Show Answer Correct Answer: A) Crystal structure. 42. If a wire breaks just after plastic flow begins then material is A) Hard. B) Strong. C) Ductile. D) Brittle. Show Answer Correct Answer: D) Brittle. 43. How many significant figures are in the number 0.0067? A) 3. B) 1. C) 2. D) 4. Show Answer Correct Answer: C) 2. 44. A unit vector is a vector having magnitude A) Null. B) Zero. C) Two. D) One. Show Answer Correct Answer: D) One. 45. Two uniform wires of the same radius and material have their lengths in the ratio 1:2. If these are stretched by the same force, the strain produced in the two wires will be in the ratio A) 2:1. B) 1:2. C) 1:1. D) 1:4. Show Answer Correct Answer: C) 1:1. 46. Explain the concept of shear modulus and its importance in material properties. A) Shear modulus only applies to liquids and gases. B) Shear modulus measures a material's thermal conductivity. C) Shear modulus is irrelevant in structural engineering. D) Shear modulus is a measure of a material's resistance to shear deformation. Show Answer Correct Answer: D) Shear modulus is a measure of a material's resistance to shear deformation. 47. Bulk Modulus is minimum for A) Aluminium. B) Gold. C) Copper. D) Lead. Show Answer Correct Answer: D) Lead. 48. A uniform aluminium wire and a uniform steel wire of same length and cross section are attached end to end. The compound wire is hung vertically from one end from a rigid support and a load is suspended at the free end. Y of steel is (20/7) times of aluminium. The ratio of increase of length of steel wire to aluminium wire is (Neglect the weight of wires) A) 7:20. B) 20:3. C) 10:7. D) 1:7. Show Answer Correct Answer: A) 7:20. 49. A copper ball of radius 'r' travels with a uniform speed 'v' in a viscous fluid. If the ball is changed with anotherball of radius '2r', then new uniform speed will be:- A) V. B) 2v. C) 8v. D) 4v. Show Answer Correct Answer: D) 4v. 50. What is happening when my ice cream changes from a solid to a liquid? A) Melting. B) Freezing. C) Burning. D) Evaporation. Show Answer Correct Answer: A) Melting. 51. A stretched rubber has A) Increased Kinetic energy. B) Decreased potential energy. C) Decreased kinetic energy. D) Increased potential energy. Show Answer Correct Answer: D) Increased potential energy. 52. The length of a wire is doubled by applying some deforming force to it. The value of strain produced in the wire is A) 1. B) 2. C) 3. D) None of these. Show Answer Correct Answer: A) 1. 53. The increase in pressure required to decreases the 200 litres volume of a liquid by 0.004% in container is:(Bulk modulus of the liquid = 2100 MPa) A) 18.8 kPa. B) 8.4 kPa. C) 84 kPa. D) 188 kPa. Show Answer Correct Answer: C) 84 kPa. 54. Identify the SI unit of thermal conductivity. A) $\mathrm{N\, m^{-2}}$. B) $\mathrm{W\, m^{-2}\, K^{-1}}$. C) $\mathrm{J\, kg^{-1}\, K^{-1}}$. D) $\mathrm{W\, m^{-1}\, K^{-1}}$. Show Answer Correct Answer: D) $\mathrm{W\, m^{-1}\, K^{-1}}$. 55. The ratio of lengths of two rods A and B of same material is 1:2 and the ratio of their radii is 2:1, then the ratio of modulus of rigidity of A and B will be A) 1:1. B) 8:1. C) 16:1. D) 4:1. Show Answer Correct Answer: A) 1:1. 56. What type of bond is primarily responsible for the hardness of diamond? A) Ionic bond. B) Covalent bond. C) Metallic bond. D) Hydrogen bond. Show Answer Correct Answer: B) Covalent bond. 57. Young's modulus of a wire is Y. what will be its new value if the length and the radius of the wire both are doubled? A) 2 Y. B) Y/4. C) Y/2. D) Y. Show Answer Correct Answer: D) Y. 58. A spring fixed at one end elongates by 5 cm, when stretched by a force of 100 N. The work done in producing this elongation is A) 1.5J. B) 5J. C) 2.5J. D) 3.2J. Show Answer Correct Answer: C) 2.5J. 59. Ability to stretch and return to the original size A) Tensile strength. B) Brittleness. C) Ductility. D) Elasticity. E) Hardness. Show Answer Correct Answer: D) Elasticity. 60. Resistance to scratching. A) Brittleness. B) Ductility. C) Hardness. D) Elasticity. E) Tensile strength. Show Answer Correct Answer: C) Hardness. Next →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Physics (Part Ii) Chapter 11 Mechanical Properties Of Solids Quiz 2Class 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