Work And Energy MCQs

By: Prof. Dr. Fazal Rehman | Last updated: March 3, 2022

Work And Energy Mcq’s 1. The 60w bulb may consume energy? A. 15J B. 40J C. 60J D. 30J Ans: C 2. Earth receive large Amount of energy directly from, A. sun B. water C. moon D. wind 3. 25000 watt power is equal to, A. 40hp B. 38.5hp C. 33hp D. 33.5hp Ans: D 4. When the angle between force and displacement is, the maximum work done within? A. 90 degree B. 40 degree C. 0 degree D. 100 degree Ans: C 5. One joule per second is called? A. Joule B. watt C. degree D. Mass Ans: B 6. When the velocity of a 5000-kg truck whose K.E is 360 KJ the truck maximum distance covered, A. 156km/h B. 43km/h C. 35km/h D. 40km/h Ans: B 7. Powered can be expressed in A. kg-m/s B. Nm/s C. N-m D. none of these Ans: B 8. one kilowatt hour of work is equal to: A. 36.0MJ B. 33MJ C. 3.6MJ D. 6.3MJ Ans: C 9. The dimension of power is: A. [ML-1] B. [MLT-2] C. [ML2T-2] D. none of these Ans: C 10. An example of conservative force is: A. centripetal force B. elastic force C. electric force D. gravitational force Ans: A 11. 1 hours power is equal to A. 746J B.746W C.746KW D.33W Ans: B 12. A moving a body may not have: A. K.E B. Speed C. potential D. P.E Ans: D 13. Ratio of dimension of power and K.E is: A. T:2 B. T:1 C. 1:T D. none of these Ans: B 14. K.E of a body of mass 2KG and momentum 2Ns is: A. 4J B. 6J C. 1J D. 3J Ans: C 15. Slope of work time graph is equal to: A. force B. dencity C. speed D. power Ans: D 16. slope of work time graph is equal to: A. Energy B. Speed C. Acceleration D. Power Ans: D 17. If a body a mass of 2kg is raised vertically through 2m, then the work done will be? A. 38.2kg B. 39.2J C. 39J D. 40J Ans: B 18. If velocity is doubled then: A. momentum increase 2 times and K.E increase 4time B. momentum increase 4 time and K.E increase 2time C. monetum and K.E remain same D. none of these Ans: A 19. The highest value of escape velocity in solar system planet is: A. Moon B. Sun C. Earth D. Jupiter Ans: D 20. Propulsion force of a rocket is: A. Radioactive force B. None conservative force C. Conservative force D. Both A and B Ans: B 21. The source of tidal energy is: A. Moon B. Sun C. Earth D. mars Ans: A 22. Gravitational P.E of a body has: A. no general formula B. no formula C. A formula mgh only D. none of these Ans: A 23. The relation between horse power and watt is: A. 1 hp = 544 watts B. 1 hp = 546 KW C. 1 hp = 546 watts D. 1 hp = 948 watts Ans: C