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प्रश्न
Choose the correct answer.
Photovoltaic cells use the energy of
विकल्प
sun
wind
water
tides
उत्तर
Photovoltaic cells use the energy of the sun
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संबंधित प्रश्न
Discuss the ways by which you can conserve energy, especially petroleum and electricity, in your homes and school. What changes do you need to make in your daily routine to save these precious resources?
Hydroelectricity is considered a good energy option for the future. Why?
Electricity is very important for all of us. We need it for our homes, offices, industries, and agriculture.
Make a list of five different ways in which you can save electricity, for instance, switching off fans, ACs, light at home, and in school when these things are not required.
Match the following.
| Column A | Column B |
| 1. Solar energy | (i) Ganga |
| 2. Hydroelectricity | (ii) Windmill |
| 3. Coal | (iii) Sun |
| 4. Wind | (iv) Non-renewable |
| 5. Farakka barrage | (v) Water |
What is tidal energy?
Which countries are major producers of wind power in the world?
What is biogas? How is it useful to us?
Explain briefly geothermal energy.
Large – scale hydroelectric projects have an impact on the environment. Search the Internet to find out how these projects affect the flora and fauna, and people’s lives in the area.
On the outline map of India given here, mark and name any five hydroelectric projects in India.
