Explore: All CBSE Class 10 chapters · CBSE Class 10 Science PYQs · CBSE Class 10 hub · Syllabus & pattern · Class 10 2026
Answer first
Sources of Energy PYQs (previous year questions) for CBSE Class 10: Sources of Energy (Science) had 4 questions across the 40 official CBSE Class 10 papers we tagged (2016–2026), and appeared in 4 of them. Asked in 4 of 10 years; last in 2020. The concepts asked in the most papers: Nuclear Energy, Biogas, Hydro Power.
Year-wise question count
Asked in 4 of 10 years.
| Year | Questions |
|---|---|
| CBSE Class 10 2026 | Not asked |
| CBSE Class 10 2025 | Not asked |
| CBSE Class 10 2024 | Not asked |
| CBSE Class 10 2023 | Not asked |
| CBSE Class 10 2022 | Not asked |
| CBSE Class 10 2020 | 1 |
| CBSE Class 10 2019 | 1 |
| CBSE Class 10 2018 | 1 |
| CBSE Class 10 2017 | Not asked |
| CBSE Class 10 2016 | 1 |
Most-asked concepts
Sorted by the number of papers a concept appeared in.
| Concept | Questions | Papers | Years |
|---|---|---|---|
| Biogas | 1 | 1 | 2019 |
| Hydro Power | 1 | 1 | 2018 |
| Nuclear Energy | 1 | 1 | 2020 |
| Solar Energy Devices | 1 | 1 | 2016 |
How to practise Sources of Energy PYQs
- Start with the concepts at the top of the table. They have come back the most.
- Solve one year’s Sources of Energy questions from the official PDF against the clock, then check the answer listed below.
- Log every miss as a concept gap, a calculation slip or a misread. Each needs a different fix.
- Once a concept is clean in two papers, move to the next. Then sit a full paper from the year pages.
Questions by year
Each line gives the question number and paper, type, concept, our one-line summary, with a link to the official PDF.
CBSE Class 102020
- Q.14 (Science (31/1/1)) · Assertion-Reason · Nuclear Energy: Assertion-reason on energy released in nuclear fission PDF
CBSE Class 102019
- Q.2 (Science (31/1/1)) · Very short answer · Biogas: Why biogas is considered an excellent fuel PDF
CBSE Class 102018
- Q.2 (Science (31/1)) · Very short answer · Hydro Power: Energy conversion in a hydropower plant PDF
CBSE Class 102016
- Q.4 (Science (31/1)) · Short answer · Solar Energy Devices: Mirror type used in solar furnaces and how high temperature is reached PDF
Other Science chapters
- Chemical Reactions and Equations PYQs
- Acids, Bases and Salts PYQs
- Metals and Non-metals PYQs
- Carbon and its Compounds PYQs
- Periodic Classification of Elements PYQs
- Life Processes PYQs
- Control and Coordination PYQs
- How do Organisms Reproduce PYQs
- Heredity and Evolution PYQs
- Light: Reflection and Refraction PYQs
- The Human Eye and the Colourful World PYQs
- Electricity PYQs
- Magnetic Effects of Electric Current PYQs
- Our Environment PYQs
- Sustainable Management of Natural Resources PYQs
FAQ
How many Sources of Energy questions come in CBSE Class 10?
In the official papers we tagged: 1 in 2020, 1 in 2019, 1 in 2018 and 1 in 2016. Not asked in the other 6 years. That is 4 questions in all, about 1% of Science.
Which Sources of Energy topics repeat in CBSE Class 10?
Asked in the most papers: Nuclear Energy, Biogas, Hydro Power. The concept table lists every one with its count.
Are these official CBSE Class 10 questions?
Yes. Every question is from an official CBSE Class 10 paper hosted on our year pages. The one-line summaries are ours; open the PDF linked beside each question for the full text.