Sources of Energy Class 10 MCQs with Explanations
Sources of Energy – MCQs with Answers & Explanations
Class: 10 | Subject: Science | Section: Physics
Topic: Sources of Energy
Based on NCERT Syllabus | CBSE Board Examination Pattern
Topic: Sources of Energy
Based on NCERT Syllabus | CBSE Board Examination Pattern
1. A good source of energy should be:
Answer: d) All of these
Explanation: An ideal source of energy must be economical, accessible, easy to store/transport, and produce large energy per unit mass.
Explanation: An ideal source of energy must be economical, accessible, easy to store/transport, and produce large energy per unit mass.
2. The main source of energy on Earth is:
Answer: b) Sun
Explanation: Solar energy drives wind, water cycle, and biomass formation, making it the primary energy source.
Explanation: Solar energy drives wind, water cycle, and biomass formation, making it the primary energy source.
3. Fossil fuels are:
Answer: b) Non‑renewable
Explanation: They take millions of years to form and cannot be replenished quickly.
Explanation: They take millions of years to form and cannot be replenished quickly.
4. Which fuel has the highest calorific value?
Answer: c) LPG
Explanation: LPG produces more heat per unit mass and burns cleanly.
Explanation: LPG produces more heat per unit mass and burns cleanly.
5. Hydropower is produced using:
Answer: b) Flowing water
Explanation: Potential energy of stored water converts into electricity via turbines.
Explanation: Potential energy of stored water converts into electricity via turbines.
6. Wind energy is a:
Answer: b) Renewable source
Explanation: Wind is naturally replenished and inexhaustible.
Explanation: Wind is naturally replenished and inexhaustible.
7. Biogas mainly contains:
Answer: b) Methane
Explanation: Methane is combustible and responsible for energy output.
Explanation: Methane is combustible and responsible for energy output.
8. Solar cells convert solar energy into:
Answer: b) Electrical energy
Explanation: Photovoltaic cells directly convert sunlight into electricity.
Explanation: Photovoltaic cells directly convert sunlight into electricity.
9. Tidal energy is obtained from:
Answer: a) Ocean tides
Explanation: Rise and fall of sea levels drive turbines.
Explanation: Rise and fall of sea levels drive turbines.
10. Geothermal energy comes from:
Answer: b) Earth’s interior heat
Explanation: Heat from underground reservoirs produces steam for power generation.
Explanation: Heat from underground reservoirs produces steam for power generation.
11. Nuclear energy is obtained by:
Answer: c) Nuclear fission
Explanation: Splitting heavy nuclei like Uranium releases enormous energy.
Explanation: Splitting heavy nuclei like Uranium releases enormous energy.
12. Renewable sources include:
Answer: c) Solar energy
Explanation: Solar energy is inexhaustible and naturally replenished.
Explanation: Solar energy is inexhaustible and naturally replenished.
13. Thermal power plants use:
Answer: b) Fossil fuels
Explanation: Coal is commonly burned to produce steam.
Explanation: Coal is commonly burned to produce steam.
14. Which is pollution free?
Answer: b) Solar energy
Explanation: It produces no harmful emissions during use.
Explanation: It produces no harmful emissions during use.
15. Non‑conventional energy source:
Answer: c) Wind energy
Explanation: It is an alternative renewable source.
Explanation: It is an alternative renewable source.
16. Biomass energy comes from:
Answer: a) Plant & animal waste
Explanation: Organic matter is decomposed or burned for energy.
Explanation: Organic matter is decomposed or burned for energy.
17. Efficiency of solar cells is about:
Answer: b) 15–20%
Explanation: Commercial solar cells have moderate efficiency.
Explanation: Commercial solar cells have moderate efficiency.
18. Largest wind farm in India is at:
Answer: a) Tamil Nadu
Explanation: Tamil Nadu leads in wind power generation.
Explanation: Tamil Nadu leads in wind power generation.
19. Which energy source causes acid rain?
Answer: c) Coal
Explanation: Burning coal releases SO₂ and NOx causing acid rain.
Explanation: Burning coal releases SO₂ and NOx causing acid rain.
20. The most eco‑friendly fuel is:
Answer: b) Biogas
Explanation: It is renewable, clean burning, and reduces waste.
Explanation: It is renewable, clean burning, and reduces waste.