This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 14 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the unit of measurement for work? A) Meters. B) Newtons. C) M/s. D) Joules. Show Answer Correct Answer: D) Joules. 2. Which of the following is an example of potential energy? A) A rock at the edge of a cliff. B) A moving car. C) A spinning top. D) A flowing river. Show Answer Correct Answer: A) A rock at the edge of a cliff. 3. Energy that is stored and held in readiness A) Kinetic. B) Mechanical. C) Work. D) Potential. Show Answer Correct Answer: D) Potential. 4. 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) N$_{A}$. B) 3 N$_{A}$. C) 6 N$_{A}$. D) 2 N$_{A}$. Show Answer Correct Answer: C) 6 N$_{A}$. 5. 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 total amount of work done over time. D) Power is the force applied to move an object. Show Answer Correct Answer: A) Power is the rate of doing work or transferring energy. 6. The factor that has the greatest effect on kinetic energy is A) Mass. B) Weight. C) Velocity. D) Time. Show Answer Correct Answer: C) Velocity. 7. 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. 8. 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. 9. 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. 10. 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) 50 W. C) 0.5 W. D) 7.5 W. Show Answer Correct Answer: D) 7.5 W. 11. 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. 12. 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%. 13. 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. 14. 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. 15. 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) Quadrupled. D) Same. Show Answer Correct Answer: C) Quadrupled. 16. 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. 17. What's the standard unit for Kinetic and Potential energy? A) Watts. B) Joules. C) KiloWatts. D) Kelvin. Show Answer Correct Answer: B) Joules. 18. 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. 19. How much work is done when two workers lift a 500-N bag of cement to platform 1.5-m high? A) 3 x 10$^{-3}$ J. B) 333.33 J. C) 750 J. D) 1500 J. Show Answer Correct Answer: C) 750 J. 20. 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. 21. 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) 84J. B) 68J. C) 23J. D) 8J. Show Answer Correct Answer: D) 8J. 22. What is the principle of conservation of energy? A) Energy in a closed system can neither be created nor destroyed, only transformed. B) Energy is always lost when work is done. C) The total mechanical energy in a system remains constant if only conservative forces act. D) Energy can be converted from potential to kinetic form without any loss. Show Answer Correct Answer: A) Energy in a closed system can neither be created nor destroyed, only transformed. 23. A push or pull that act on an object is called A) Work. B) Force. C) Energy. D) Momentum. Show Answer Correct Answer: B) Force. 24. 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) 0.25 J. C) 25 J. D) 250 J. Show Answer Correct Answer: C) 25 J. 25. 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. ← PreviousNext →Related 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 6Class 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 9Class 11 Physics (Part I) Chapter 4 Work Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books