Short Questions (120)
Easy Questions (30%)
1. What is work in physics?
2. Define energy.
3. What is the unit of work in the SI system?
4. Give an example of kinetic energy.
5. Define potential energy.
6. What is mechanical energy?
7. Name two types of mechanical energy.
8. What is heat energy?
9. What is the primary source of energy for Earth?
10. What is a fossil fuel? Give two examples.
11. Define renewable energy sources.
12. What is meant by non-renewable energy?
13. What is wind energy?
14. Name a device that converts solar energy into electricity.
15. What is geothermal energy?
16. Define chemical energy with an example.
17. What is nuclear energy?
18. Give one example of energy from biomass.
19. Define power.
20. What is the formula for work done?
21. State the unit of power.
22. Define efficiency.
23. What is solar house heating?
24. Name a common energy converter in our homes.
25. What is the major disadvantage of fossil fuels?
26. Name a device used to convert heat energy into electrical energy.
27. How is energy from the sun harnessed?
28. What type of energy is stored in a compressed spring?
29. What is sound energy?
30. Name a source of light energy.
Moderate Questions (40%)
31. Explain the relationship between work and energy.
32. What is the difference between kinetic and potential energy?
33. Describe the concept of energy conversion.
34. Explain the law of conservation of energy.
35. What is the energy of an object at rest?
36. Define electrical energy with an example.
37. How is electricity generated from fossil fuels?
38. State two advantages of renewable energy sources.
39. How is energy from water utilized?
40. What are the environmental impacts of nuclear energy?
41. Explain the concept of interconversion of energy with an example.
42. What is solar cell efficiency?
43. What is the primary difference between renewable and non-renewable energy?
44. State the equation for kinetic energy.
45. How can we calculate potential energy?
46. What are the main sources of geothermal energy?
47. Define mass-energy equivalence.
48. How does a power station work?
49. Describe the energy transformation in an electric lamp.
50. What is the role of a turbine in electricity generation?
51. How does wind energy produce electricity?
52. Explain the working principle of a solar cell.
53. How does chemical energy convert into electrical energy in a battery?
54. What are the main components of a power station?
55. Explain why fossil fuels are considered non-renewable.
56. How does energy from biomass differ from fossil fuel energy?
57. Describe the energy conversion in a vehicle running at constant speed on a level road.
58. What is meant by the efficiency of an energy converter?
59. Describe the disadvantages of using fossil fuels as a source of energy.
60. What is the mass-energy equation?
61. Explain the concept of solar house heating.
62. What are the main challenges of using solar energy?
63. How is nuclear energy converted into electrical energy?
64. What is the main environmental impact of burning fossil fuels?
65. Why is efficiency an important factor in power stations?
66. How can energy from biomass be used in daily life?
67. Describe a flow diagram of an energy converter in a power station.
68. How can we reduce the environmental impact of using fossil fuels?
69. What is the effect of energy production on the environment?
70. Explain the role of an energy converter in a power station.
Tough Questions (30%)
71. What are the limitations of using renewable energy sources?
72. Explain the advantages and disadvantages of nuclear energy.
73. How is energy conserved in a closed system?
74. Discuss the challenges of generating electricity from wind energy.
75. How does the efficiency of a power station affect its output?
76. What is the impact of energy production on global warming?
77. Compare and contrast different forms of renewable energy.
78. Explain the environmental and economic benefits of using solar cells.
79. How does geothermal energy contribute to energy production?
80. Discuss the potential of biomass as an energy source.
81. How does the mass-energy equation apply to nuclear reactions?
82. What are the safety concerns associated with nuclear energy?
83. Describe the energy transformations in a hydroelectric power plant.
84. What are the main sources of energy loss in power stations?
85. How can energy be conserved in household appliances?
86. Explain the long-term impact of using non-renewable energy sources.
87. What are the major hurdles in converting solar energy to electrical energy?
88. How does the law of conservation of energy apply to mechanical systems?
89. Discuss the use of renewable energy in reducing carbon footprint.
90. Explain the role of heat energy in the functioning of a thermal power station.
91. What is the significance of interconversion of energy in modern technology?
92. Discuss the pros and cons of using geothermal energy compared to wind energy.
93. How does energy production impact air quality?
94. Compare the efficiency of different energy converters.
95. What are the future prospects of renewable energy sources in global energy production?
96. Discuss the implications of energy conservation for sustainable development.
97. How can power station efficiency be improved?
98. Describe the working of a nuclear power plant.
99. What is the role of turbines in converting kinetic energy to electrical energy?
100. What measures can be taken to reduce the environmental impact of power stations?
101. How does chemical energy in food convert to mechanical energy in the body?
102. Explain the significance of the mass-energy equation in understanding energy transformations.
103. What is the role of efficiency in renewable energy systems?
104. Discuss the long-term sustainability of nuclear energy as a primary source.
105. How do environmental factors affect the production of energy from renewable sources?
106. Explain the challenges of integrating renewable energy into the existing power grid.
107. How does an increase in energy efficiency impact energy conservation?
108. What are the prospects of developing new forms of renewable energy?
109. Describe the challenges associated with energy storage in renewable energy systems.
110. How does energy production from fossil fuels contribute to acid rain?
Long Questions (10)
Easy Questions (3)
1. Define work and energy. Explain with suitable examples how energy is converted from one form to another.
2. Discuss the concept of potential and kinetic energy with examples. How are these energies interrelated?
3. What is renewable energy? Explain any three renewable energy sources in detail.
Moderate Questions (4)
4. Discuss in detail the interconversion of energy. Explain with the help of suitable diagrams.
5. What are the environmental impacts of using fossil fuels for energy production? Suggest ways to minimize these impacts.
6. Explain the working of a power station with the help of a flow diagram. Describe the main stages involved in energy conversion.
7. Describe in detail the advantages and disadvantages of using nuclear energy. How can we ensure its safe use?
Tough Questions (3)
8. What are the challenges associated with the production and use of renewable energy? Discuss the future prospects of renewable energy.
9. Explain the mass-energy equivalence equation. How does it apply to nuclear reactions and the production of nuclear energy?
10. Discuss the efficiency and sustainability of various energy sources. Compare the long-term viability of using renewable and non-renewable energy sources.