This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 4 Work – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 6 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. An object is in free fall. The change in gravitational potential energy of the body depends upon its mass m, the change in height $\Delta$h and the gravitational field strength g. What is the correct expression for the change in gravitational potential energy? A) G$\Delta$h/m. B) M$\Delta$h/g. C) Gm/$\Delta$h. D) Gm$\Delta$h. Show Answer Correct Answer: D) Gm$\Delta$h. 2. What is the symbol used to represent the internal energy of a system? A) Q. B) W. C) $\Delta$E. D) E. Show Answer Correct Answer: D) E. 3. It takes 9 seconds to move an object 3 meters using a force of 6 Newtons. What's the power? A) 81 W. B) 2 W. C) 4 W. D) None of the above. Show Answer Correct Answer: B) 2 W. 4. Work is a product of A) F / S. B) F * S. C) F + S. D) None of these. Show Answer Correct Answer: B) F * S. 5. Assertion:In an elastic collision between two bodies, the energy of each body is conserved.Reason:The total energy of an isolated system is conserved. A) Assertion and Reason are true, Reason is the correct explanation of Assertion. B) Assertion and Reason are true, Reason is not the correct explanation of Assertion. C) Assertion is true, Reason is false. D) Both Assertion and Reason are false. Show Answer Correct Answer: D) Both Assertion and Reason are false. 6. Which of the following is not a form of energy? A) Electricity. B) Light. C) Sound. D) Air. Show Answer Correct Answer: D) Air. 7. F=200 Nd=50 mw=?? A) 0.25 J. B) 4 J. C) 250 J. D) 10, 000 J. Show Answer Correct Answer: D) 10, 000 J. 8. A ball is thrown directly upward. Which of the following is TRUE before it reaches its maximum height? A) A.Its potential energy increases and kinetic energy decreases. B) Its potential energy always equals to kinetic energy. C) Its potential energy decreases and kinetic energy increases. D) Its potential energy is 0 J and kinetic energy is constant. Show Answer Correct Answer: A) A.Its potential energy increases and kinetic energy decreases. 9. What energy resource produces energy from recently living organisms such as leaves or plants? These materials can be burned to release energy. A) Geothermal. B) Solar. C) Biomass. D) Hydroelectric. Show Answer Correct Answer: C) Biomass. 10. The more POWER you use to move an object, the more work you do. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. Which value and symbol are incorrectly paired? A) Work and joules. B) Force and newton. C) Power and watt. D) Potential energy and watt. Show Answer Correct Answer: D) Potential energy and watt. 12. Which ONE of the following physical quantities is equal to the product of force and constant velocity? A) Acceleration. B) Energy. C) Power. D) Work. Show Answer Correct Answer: C) Power. 13. What is the work done on an object when the applied force is zero? A) Zero. B) Cannot be determined. C) Positive. D) Negative. Show Answer Correct Answer: A) Zero. 14. What happens to the kinetic energy of a moving object if the net work done is positive? A) Tke kinetic energy is zero. B) The kinetic energy increase. C) The kinetic energy remains constant. D) The kinetic energy decrease. Show Answer Correct Answer: B) The kinetic energy increase. 15. At the top of its arc, a pendulum has maximum kinetic enert A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 16. How much work is done on a vacuum cleaner pulled 3m by a force of 50N at an angle of 30-degrees above the horizontal? A) 130J. B) 240J. C) 50J. D) 80J. Show Answer Correct Answer: A) 130J. 17. Silly Sally leaves her iPhone on top of a brick wall. Then it falls off of the wall. What is the energy transformation? A) Kinetic Energy to gravitational potential energy. B) Gravitational potential energy to Kinetic Energy. C) Electrical potential energy to kinetic energy. D) Spring potential energy to kinetic energy. Show Answer Correct Answer: B) Gravitational potential energy to Kinetic Energy. 18. The law of Conservation of Energy says ..... A) Energy is constantly created. B) Energy can not be created or destroyed instead it changes from one form to another. C) Energy can not change forms. D) None of the above. Show Answer Correct Answer: B) Energy can not be created or destroyed instead it changes from one form to another. 19. What is the unit of measurement for work? A) Joules. B) Newtons. C) M/s. D) Meters. Show Answer Correct Answer: A) Joules. 20. Which of the following is an example of potential energy? A) A rock at the edge of a cliff. B) A spinning top. C) A flowing river. D) A moving car. Show Answer Correct Answer: A) A rock at the edge of a cliff. 21. Energy that is stored and held in readiness A) Potential. B) Kinetic. C) Mechanical. D) Work. Show Answer Correct Answer: A) Potential. 22. Calcium chloride when dissolved in water dissociates into its ions accordingto the following equation.CaCl$_{2}$ (aq) $\rightarrow$ Ca$^{2+}$ (aq) + 2Cl$^{-}$ (aq)The number of ions obtained from CaCl$_{2}$ when 222 g of it is dissolved in water is: A) 2 N$_{A}$. B) 6 N$_{A}$. C) 3 N$_{A}$. D) N$_{A}$. Show Answer Correct Answer: B) 6 N$_{A}$. 23. Define power in the context of work and energy. A) Power is the rate of doing work or transferring energy. B) Power is the energy stored in an object. C) Power is the force applied to move an object. D) Power is the total amount of work done over time. Show Answer Correct Answer: A) Power is the rate of doing work or transferring energy. 24. The factor that has the greatest effect on kinetic energy is A) Weight. B) Velocity. C) Mass. D) Time. Show Answer Correct Answer: B) Velocity. 25. A compressed spring possesses A) Elastic Potential Energy. B) Gravitational Potential Energy. C) Kinetic Energy. D) None of the above. Show Answer Correct Answer: A) Elastic Potential Energy. 26. Which of the following statements is NOT true about work? A) Work is a form of energy. B) A kg*m$^{2}$/s$^{2}$ would be a unit of work. C) Watt is a standard metric unit of work. D) Unit of work would be equivalent to a Newton-meter. Show Answer Correct Answer: C) Watt is a standard metric unit of work. 27. Which does not illustrate kinetic energy? A) It is expressed in Joule. B) It depends upon the objects' mass and speed. C) It is the energy an object possesses due to its motion. D) It depends upon the objects' mass and objects' height. Show Answer Correct Answer: D) It depends upon the objects' mass and objects' height. 28. A juggler throws continuously balls at the rate of three in each second each with a velocity of 10 ms$^{-1}$. If the mass of each ball is 0.05 kg his power is A) 2 W. B) 0.5 W. C) 7.5 W. D) 50 W. Show Answer Correct Answer: C) 7.5 W. 29. Jane carries a 5 kg box and Lorie carries a 10 kg box up a set of stairs, who did more work? A) Jane because his box was lighter. B) Lorie because her box weighed more. C) Can't tell. D) None of the above. Show Answer Correct Answer: B) Lorie because her box weighed more. 30. The efficiency of a machine is defined as: A) The ratio of output work to input work, multiplied by 100%. B) The ratio of output work to input work, divided by 100%. C) The difference between output work and input work. D) The total work done by the machine. Show Answer Correct Answer: A) The ratio of output work to input work, multiplied by 100%. 31. Work is done when a weightlifter holds a barbell still above his head. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 32. A herd of zebras running away from a lioness. is work done? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 33. A force when applied to a string stretches it. If the applied force is doubled, the potential energy of the spring will be A) Doubled. B) Halved. C) Same. D) Quadrupled. Show Answer Correct Answer: D) Quadrupled. 34. Work is done on an object when the object moves in the SAME direction in which the force is applied. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 35. What's the standard unit for Kinetic and Potential energy? A) Joules. B) KiloWatts. C) Kelvin. D) Watts. Show Answer Correct Answer: A) Joules. 36. A 10 gram ball is held 2 meters from the ground. What type of energy does the ball have? A) Kinetic Energy. B) Elastic Potential Energy. C) Gravitational Potential Energy. D) None of the above. Show Answer Correct Answer: C) Gravitational Potential Energy. 37. How much work is done when two workers lift a 500-N bag of cement to platform 1.5-m high? A) 750 J. B) 1500 J. C) 333.33 J. D) 3 x 10$^{-3}$ J. Show Answer Correct Answer: A) 750 J. 38. Define work done A) Product of force and distance moved. B) Product of force and displacement. C) Force x perpendicular distance from pivot. D) Ratio of force and distance moved in direction of force. Show Answer Correct Answer: B) Product of force and displacement. 39. A spring 40 mm long is stretched by the application of a force. If 10 N force required to stretch the spring through 1 mm, then work done in stretching the spring through 40 mm is A) 68J. B) 8J. C) 84J. D) 23J. Show Answer Correct Answer: B) 8J. 40. What is the principle of conservation of energy? A) The total mechanical energy in a system remains constant if only conservative forces act. B) Energy can be converted from potential to kinetic form without any loss. C) Energy in a closed system can neither be created nor destroyed, only transformed. D) Energy is always lost when work is done. Show Answer Correct Answer: C) Energy in a closed system can neither be created nor destroyed, only transformed. 41. A push or pull that act on an object is called A) Momentum. B) Energy. C) Work. D) Force. Show Answer Correct Answer: D) Force. 42. Under the action of a force a 2 kg body moves such that its position 'x' in meters as a function of time 't' in seconds given by:x = t$^{2}$/2. The work done by the force in the first 5 seconds is A) 2.5 J. B) 25 J. C) 250 J. D) 0.25 J. Show Answer Correct Answer: B) 25 J. 43. Energy Efficiency is calculated by useful energy (Energy Out) divided by energy consumed (Energy In), expressed as a percentage A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 44. What is the formula for finding gravitational potential energy GPE? A) D/t. B) Mgh. C) Fd. D) $\frac{1}{2}mv^2$. Show Answer Correct Answer: B) Mgh. 45. An Xbox consumes 15.7 watts while in standby mode. If you leave it in standby mode for 86, 400 seconds (one day), how much work was done? A) 1, 356, 480 J. B) 1, 356, 460 J. C) 1, 356, 470 J. D) 1, 356, 490 J. Show Answer Correct Answer: A) 1, 356, 480 J. 46. A 35 kg chair is lifted 5 m off the ground. What is its potential energy? A) 30 J. B) 1715 J. C) 40 J. D) 175 J. Show Answer Correct Answer: B) 1715 J. 47. A ball moves on a frictionless inclined table without slipping. The work done by the table surface on the ball is A) Positive. B) Negative. C) Zero. D) None of the above. Show Answer Correct Answer: D) None of the above. 48. SI unit of work is A) Kg. B) N. C) Ml. D) J. Show Answer Correct Answer: D) J. 49. True or false:kinetic energy depends on an object's acceleration and mass. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 50. What is the definition of power? A) Power is the product of force and velocity. B) Power is the product of force and work done per unit time. C) Power is the product of force per unit time and velocity. D) Power is the rate at which work is done. Show Answer Correct Answer: D) Power is the rate at which work is done. 51. A cyclist travels up a slope through a vertical height h in a time t. The mass of the cyclist and his bike is m.The average power of the cyclist is A) $\frac{mgh}{t}$. B) $\frac{mgh}{t^2}$. C) $mgh\times t$. D) $\frac{m^2gh}{t}$. Show Answer Correct Answer: A) $\frac{mgh}{t}$. 52. The sum of kinetic and potential energy is called ..... A) Nonmechanical energy. B) Sum energy. C) Mechanical energy. D) Space energy. Show Answer Correct Answer: C) Mechanical energy. 53. What is the significance of the work-energy theorem in mechanical systems? A) The work-energy theorem relates work done to changes in kinetic energy, simplifying analysis of mechanical systems. B) It describes the conservation of momentum in collisions. C) It only applies to systems in equilibrium. D) It states that energy cannot be created or destroyed. Show Answer Correct Answer: A) The work-energy theorem relates work done to changes in kinetic energy, simplifying analysis of mechanical systems. 54. 1 joule in erg is A) 10$^{5}$ erg. B) 10$^{6}$ ergs. C) 10$^{7}$ ergs. D) 10$^{8}$ ergs. Show Answer Correct Answer: C) 10$^{7}$ ergs. 55. A car of mass $1.5\times10^3kg$ A) $1500\times\left(\frac{25}{2}\right)^2$. B) $750\times\left(\frac{25}{2}\right)^2$. C) $1500\times\left(25\right)^2$. D) $750\times\left(25\right)^2$. Show Answer Correct Answer: D) $750\times\left(25\right)^2$. 56. It takes 0.5 seconds for a crane to move an object with a potential energy of 1000 J to a potential energy of 4000 J. What is the power of the machine? A) 6000 watts. B) 4000 watts. C) 2000 watts. D) 8000 watts. Show Answer Correct Answer: A) 6000 watts. 57. The SI unit for power is ..... ? A) Joules. B) Newtons. C) Watts. D) Metres. Show Answer Correct Answer: C) Watts. 58. Which of the following statements best describes the law of conservation of energy? A) Energy can be created but not destroyed. B) Energy can be destroyed but not created. C) Energy cannot be created or destroyed. D) Energy can be created and destroyed freely. Show Answer Correct Answer: C) Energy cannot be created or destroyed. 59. The kinetic energy of an object depends on which of the following factors? A) Its height above the ground. B) Its mass and velocity. C) Its volume. D) Its color. Show Answer Correct Answer: B) Its mass and velocity. 60. Calculate the electricity bill amount for a month of 30 days, if the rate of electricity is 2.50 rupees per unit and the following devices are used as specified:a. Two bulbs of 40W for six hours.b. Two tubelights of 50W for eight hours.c. A TV of 120W for six hours. A) Rs. 175. B) Rs. 150. C) Rs. 300. D) Rs. 200. Show Answer Correct Answer: B) Rs. 150. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Physics (Part I) Chapter 4 Work Quiz 1Class 11 Physics (Part I) Chapter 4 Work Quiz 2Class 11 Physics (Part I) Chapter 4 Work Quiz 3Class 11 Physics (Part I) Chapter 4 Work Quiz 4Class 11 Physics (Part I) Chapter 4 Work Quiz 5Class 11 Physics (Part I) Chapter 4 Work Quiz 7Class 11 Physics (Part I) Chapter 4 Work Quiz 8Class 11 Physics (Part I) Chapter 4 Work Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books