Methane is the main combustible component of biogas while solar energy is the renewable source listed, so this Class 10 sheet opens by naming the biogas fuel and sorting the renewable supply. Photovoltaic cells and hydroelectric power both appear in the answers.
Key Takeaways
Solar energy is renewable (Q1).
Methane is the main combustible component of biogas (Q2).
Q3 records photovoltaic cells among the answers.
Section A: Multiple Choice Questions (1 Mark Each)
Choose the correct option for each question.
1.Which of the following is a renewable source of energy?
(a) coal(b) petroleum(c) solar energy(d) natural gas
5.The energy of flowing or falling water is harnessed to generate
(a) tidal energy(b) hydroelectric power(c) geothermal energy(d) wind energy
6.The fuel commonly burnt in thermal power plants is
(a) uranium(b) coal(c) biogas(d) hydrogen
Section B: Short Answer Type Questions (2 Marks Each)
Show all steps clearly.
7.What is a renewable source of energy? Give two examples.
8.What is a non-renewable source of energy? Give two examples.
9.State two advantages of solar energy.
10.What is biogas? Name its main constituent.
11.On what principle does a solar cooker work?
12.What is nuclear fission? Give one example of a fissionable fuel.
13.What is geothermal energy?
14.Why are fossil fuels called non-renewable sources of energy?
Section C: Numericals & Word Problems (3 Marks Each)
Apply the concepts to solve the problems. Show all working.
15.A solar panel of area 1 m² receives solar energy at the rate of 800 W per m². If it converts 20% of the received energy into electricity, find the electric power produced.
16.A household uses four bulbs of 60 W each for 5 hours every day. Find the total energy consumed in one day. Express the answer in kWh. (Energy = power × time)
17.A windmill generates 2 kW of power. Find the energy it produces in 5 hours. Express the answer in kWh. (Energy = power × time)
18.A biogas plant produces 5 kg of biogas per day. If the calorific value of biogas is 25 MJ per kg, find the total energy released in one day. (Energy = mass × calorific value)
19.An electric heater of 2000 W is used for 2 hours every day. Find the energy consumed in a month of 30 days. Express the answer in kWh.
20.An electric kettle of power 1000 W heats water for 3 minutes. Find the heat energy supplied by the kettle. (Energy = power × time, time in seconds)
Answer Key
1. c) solar energy
2. b) methane
3. c) photovoltaic cells
4. b) nuclear fission
5. b) hydroelectric power
6. b) coal
7. Refer to solution guide.
8. Refer to solution guide.
9. Refer to solution guide.
10. Refer to solution guide.
11. Refer to solution guide.
12. Refer to solution guide.
13. Refer to solution guide.
14. Refer to solution guide.
15. Refer to solution guide.
16. Refer to solution guide.
17. Refer to solution guide.
18. Refer to solution guide.
19. Refer to solution guide.
20. Refer to solution guide.
End of Worksheet
People Also Ask
Which of these is a renewable source of energy?
Solar energy, option (c) in this worksheet (Q1).
What is the main combustible component of biogas?
Methane, option (b) in this worksheet (Q2).
What converts sunlight directly to electricity?
Photovoltaic cells, option (c) in this worksheet (Q3).
Stuck on a similar problem? Clear your next doubt instantly with the Doubt Solver.
Browse more free worksheets for CBSE Grade 10.