Waves, Energy, Machines and Power

1. Running water, a speeding bullet, wind or a moving car possess which form of energy?

Question 1 of 45

2. The ratio of Load to effort is?

Question 2 of 45

3. POWER = work done/time taken

Question 3 of 45

4. What is the formula of gravitational potential energy P.E?

Question 4 of 45

5. Efficiency is the ratio of work done by the load to the work done on the effort?

Question 5 of 45

6. Which of the following is not a non-renewable energy resource?

Question 6 of 45

7. Give the velocity ratio V.R of a single movable pulley?

Question 7 of 45

8. Mention any form of energy

Question 8 of 45

9. The velocity ratio V.R of a block and tackle pulley system is equal to no. of strings supporting the Load?

Question 9 of 45

10. Which type of energy which can be recycled or reused over and over again and it cannot be exhausted?

Question 10 of 45

11. A compressed string or compressed air in an air bottle possess which form of energy?

Question 11 of 45

12. What is the SI UNIT of POWER?

Question 12 of 45

13. The velocity ratio V.R of a hydraulic machine is equal to R squared/ r squared

Question 13 of 45

14. A body in motion possess which form of energy?

Question 14 of 45

15. How is the V.R of Gears calculated?

Question 15 of 45

16. Mention 2 types of mechanical energy

Question 16 of 45

17. Name the form of energy which is contained in substances and be converted to heat by the process of oxidation (burning)

Question 17 of 45

18. Which simple machines depend on the principle of moments for them to work? (Clockwise moments=anticlockwise moments)

Question 18 of 45

19. Which type of energy is exhaustible and once its material is used it cannot be retrieved?

Question 19 of 45

20. What is the name of the force exerted by the machine?

Question 20 of 45

21. For a pendulum bob, the position of its maximum kinetic energy has zero potential energy and the position of its maximum potential energy has zero kinetic energy?

Question 21 of 45

22. A body due its relative position or state possess which form of energy?

Question 22 of 45

23. State the Law of conversation of energy?

Question 23 of 45

24. Which of the following is the ODD one out?

Question 24 of 45

25. Give the velocity ratio V.R of a block and tackle pulley?

Question 25 of 45

26. Energy spent is the product of force and distance i.e. F x D

Question 26 of 45

27. Which of the following statement is CORRECT about efficiency?

Question 27 of 45

28. Is the following formula correct 1Nm = 1 joule (J)?

Question 28 of 45

29. Which of the following is a class of levers?

Question 29 of 45

30. Which among the following is not among a SIMPLE MACHINE?

Question 30 of 45

31. What is the formula of elastic potential energy?

Question 31 of 45

32. Which of the following statement is CORRECT about work?

Question 32 of 45

33. Which of the following is not a source of energy?

Question 33 of 45

34. How is the velocity ratio of a screw machine calculated?

Question 34 of 45

35. Which form of energy is produced by vibrating objects or particles i.e. when a wave is plucked?

Question 35 of 45

36. The law of conservation of energy states also that the sum of kinetic energy and potential energy of a system is constant.

Question 36 of 45

37. What is the name of the device that enables work to be done more easily or conveniently?

Question 37 of 45

38. Which of the following is not a type of wave energy?

Question 38 of 45

39. The distance between 2 successive threads in a screw is called?

Question 39 of 45

40. The ratio of distance moved by effort to the distance moved by the load is?

Question 40 of 45

41. What is POWER?

Question 41 of 45

42. Which form of energy flows from one region to another due to temperature difference?

Question 42 of 45

43. Which among the following is not a type of pulley?

Question 43 of 45

44. What is the name of the force applied to the machine?

Question 44 of 45

45. Give the velocity ratio V.R of a single fixed pulley?

Question 45 of 45