This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 27 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 27 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A machine does 500 J of work in 1 minute. What is its average power output? A) 500 W. B) 30, 000 W. C) 8.3 W. D) 460 W. Show Answer Correct Answer: C) 8.3 W. 2. If an object moves from a high place to a lower place, will it gain or lose potential energy? A) Lose. B) Gain. C) Neither. D) Both. Show Answer Correct Answer: A) Lose. 3. The second of Newton's Laws says ..... A) An object in motion will stay in motion. B) The force on an object is equal to its mass times its acceleration. C) When objects interact, they apply forces to each other of equal magnitude and opposite direction. D) None of the above. Show Answer Correct Answer: B) The force on an object is equal to its mass times its acceleration. 4. Potential energy is ..... A) Energy in motion. B) Stored energy. C) All the above. D) None of the above. Show Answer Correct Answer: B) Stored energy. 5. Power is defined as the rate ..... A) Of change of velocity. B) At which work is done. C) Of change of momentum. D) Of change of displacement. Show Answer Correct Answer: B) At which work is done. 6. What unit is used to measure power? A) Meter per second. B) Watt. C) Joule. D) Newton. Show Answer Correct Answer: B) Watt. 7. Hafiy Danial pushed a box of toys on the floor with a force of 25N for a distance of 7m. Calculate the work done by Hafiy Danial A) 3.57 J. B) 175 J. C) 35 J. D) 17.5 J. Show Answer Correct Answer: B) 175 J. 8. To solve for power, we use the formula:Power = Work divided by ..... A) Velocity. B) Force. C) Distance. D) Time. Show Answer Correct Answer: D) Time. 9. What would happen to the kinetic energy of an object if you doubled the mass? A) The kinetic energy would be cut in half. B) The kinetic energy would double. C) The kinetic energy would triple. D) It would stay the same because mass does not effect kinetic energy. Show Answer Correct Answer: B) The kinetic energy would double. 10. The unit or label for work is A) Netwons. B) Joules. C) Meters. D) Seconds. Show Answer Correct Answer: B) Joules. 11. Name the physical quantity in which is measured in Calorie? How it is related to SI unit. A) Work, 1 J = 1.6 x $10^{-19}$. B) Work, 1 C= 4.18.J. C) Energy, 1 C= 4.18.J. D) None of the above. Show Answer Correct Answer: C) Energy, 1 C= 4.18.J. 12. A machine gun of mass "M" fires "n" bullets each of mass "m" with a velocity "v" in a time "t" . The power of the machine gun is 4) mnv/t A) MMnv$^{2}$/2 t. B) Mnv$^{2}$/2t. C) Mnv$^{2}$/2t. D) Mnv/t. Show Answer Correct Answer: B) Mnv$^{2}$/2t. 13. A 10 kg mass is lifted to 3 m. What is its weight? What is its potential energy? How much work is being done? A) Weight = 30 NPE = 30 J Work = 294 J. B) Weight = 10 kgPE = 10 JWork = 30 J. C) Weight = 98 NPE = 294 J Work = 294 J. D) Weight = 98 NPE = 294 J Work = 30 J. Show Answer Correct Answer: C) Weight = 98 NPE = 294 J Work = 294 J. 14. Name the form of energy, which is put to use A) KE. B) ME. C) PE. D) None of the above. Show Answer Correct Answer: A) KE. 15. ..... can move faster through empty space. A) Sound. B) Nuclear. C) Light / Radiant. D) Chemical. Show Answer Correct Answer: C) Light / Radiant. 16. Which of the following is the correct formula for calculating kinetic energy? A) $KE = \frac{1}{2}mv^2$. B) $KE = mv^2$. C) $KE = \frac{1}{2}mv$. D) $KE = mgh$. Show Answer Correct Answer: A) $KE = \frac{1}{2}mv^2$. 17. As a ball falls freely, A) Its kinetic energy decreases and potential energy decreases. B) Its kinetic energy decreases and potential energy increases. C) Its kinetic energy increases and potential energy decreases. D) Its kinetic energy increases and potential energy increases. Show Answer Correct Answer: C) Its kinetic energy increases and potential energy decreases. 18. In tug of war, work done by a losing team is A) Zero. B) Positive. C) Negative. D) None of these. Show Answer Correct Answer: C) Negative. 19. The law that energy can be neither created or destroyed is called the law of A) Null effect. B) Balance of energy. C) Non-destruction of energy. D) Conservation of energy. Show Answer Correct Answer: D) Conservation of energy. 20. If the same work is done, a more powerful machine will: A) Use more total energy. B) Complete the task faster. C) Apply a greater force. D) Move a greater distance. Show Answer Correct Answer: B) Complete the task faster. 21. An electric heater of rating 1000 W is used for 5 hrs per day for 20 days. What is the electrical energy utilized? A) 100 kwh. B) 200 kwh. C) 120 kwh. D) 500 kwh. Show Answer Correct Answer: A) 100 kwh. 22. "the work done by the net force on a body equals the change in the body's kinetic energy" this is the statement for? A) Power. B) Energy. C) Work done. D) Work Energy Theorem. Show Answer Correct Answer: D) Work Energy Theorem. 23. Gravitational potential energy depends on which of the following factors? A) Mass and speed. B) Height and mass. C) Speed and time. D) Distance and direction. Show Answer Correct Answer: B) Height and mass. 24. Which of the following remain constant of an isolated system? A) Sum of kinetic energy and spotential energy. B) Kinetic energy. C) Potential energy. D) None of above. Show Answer Correct Answer: A) Sum of kinetic energy and spotential energy. 25. Richard pulls a toy 3.0 m across the floor by a string, applying a force of 0.50 N. During the first meter, the string is parallel to the floor. In the next two meters, the string makes an angle of 30$^{o}$ with the horizontal direction. What is the total amount of work done by Richard on the toy? A) 1.000 J. B) 1.299 J. C) 1.366 J. D) 1.500 J. Show Answer Correct Answer: C) 1.366 J. ← 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