Waves, Energy, Machines and Power

1. The ratio of Load to effort is?

Question 1 of 45

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

Question 2 of 45

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

Question 3 of 45

4. State the Law of conversation of energy?

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

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

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

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

Question 8 of 45

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

Question 9 of 45

10. Mention 2 types of mechanical energy

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

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

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13. POWER = work done/time taken

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14. What is the formula of elastic potential energy?

Question 14 of 45

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Question 28 of 45

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

Question 29 of 45

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

Question 30 of 45

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

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

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33. What is the SI UNIT of POWER?

Question 33 of 45

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

Question 34 of 45

35. What is POWER?

Question 35 of 45

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

Question 36 of 45

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

Question 37 of 45

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

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

Question 39 of 45

40. 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 40 of 45

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

Question 41 of 45

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

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43. Mention any form of energy

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

Question 44 of 45

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

Question 45 of 45