Waves, Energy, Machines and Power

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

Question 1 of 45

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

Question 2 of 45

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

Question 3 of 45

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

Question 4 of 45

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

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6. The ratio of Load to effort is?

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7. What is POWER?

Question 7 of 45

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

Question 8 of 45

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

Question 9 of 45

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

Question 10 of 45

11. State the Law of conversation of energy?

Question 11 of 45

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

Question 12 of 45

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

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

Question 14 of 45

15. POWER = work done/time taken

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

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17. Mention 2 types of mechanical energy

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

Question 18 of 45

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

Question 19 of 45

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

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

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

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

Question 23 of 45

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

Question 24 of 45

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

Question 25 of 45

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

Question 26 of 45

27. 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 27 of 45

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

Question 28 of 45

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

Question 29 of 45

30. What is the formula of elastic potential energy?

Question 30 of 45

31. Mention any form of energy

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

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33. What is the SI UNIT of POWER?

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 statement is CORRECT about work?

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

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

Question 37 of 45

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

Question 38 of 45

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

Question 39 of 45

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

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

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

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

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

Question 44 of 45

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

Question 45 of 45