Waves, Energy, Machines and Power

1. POWER = work done/time taken

Question 1 of 45

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

Question 2 of 45

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

Question 3 of 45

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

Question 4 of 45

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

Question 5 of 45

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

Question 6 of 45

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

Question 7 of 45

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

Question 8 of 45

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

Question 9 of 45

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

Question 10 of 45

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

Question 11 of 45

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

Question 12 of 45

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

Question 13 of 45

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

Question 14 of 45

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

Question 15 of 45

16. Mention 2 types of mechanical energy

Question 16 of 45

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

Question 17 of 45

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

Question 18 of 45

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

Question 19 of 45

20. The ratio of Load to effort is?

Question 20 of 45

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

Question 21 of 45

22. What is the formula of elastic potential energy?

Question 22 of 45

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

Question 23 of 45

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

Question 24 of 45

25. What is the SI UNIT of POWER?

Question 25 of 45

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

Question 26 of 45

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

Question 27 of 45

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

Question 28 of 45

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

Question 29 of 45

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

Question 30 of 45

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

Question 31 of 45

32. 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 32 of 45

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

Question 33 of 45

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

Question 34 of 45

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

Question 35 of 45

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

Question 36 of 45

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

Question 37 of 45

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

Question 38 of 45

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

Question 39 of 45

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

Question 40 of 45

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

Question 41 of 45

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

Question 42 of 45

43. State the Law of conversation of energy?

Question 43 of 45

44. Mention any form of energy

Question 44 of 45

45. What is POWER?

Question 45 of 45