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प्रश्न
Fill in the blank
Solar cells use the power supplied by the ______.
उत्तर
Solar cells use the power supplied by the Sunlight.
APPEARS IN
संबंधित प्रश्न
Compare and contrast fossil fuels and the Sun as direct sources of energy
What is meant by a non-renewable source of energy? Give two examples of non-renewable source of energy.
Name two sources of energy which you consider to be non-renewable. Give reason for your choice.
What are the various fuels which are used to generate electricity in a thermal power plant?
Complete the following sentence:
Domestic gas cylinders like Indane contain mainly ..............
Write a short note on the pollution caused by burning fossil fuels.
Why is the leakage of LPG detected easily although it is odourless? State the steps to be taken in case its leakage is detected in the kitchen.
Describe how fossil fuels were formed.
Fossil fuels are energy rich compounds of an element X which were originally made by the plants with help of sun's energy.
Name another element which is usually found in combination with X in fossil fuels.
Apart from cattle dung, what other substances can be added to a biogas plant?
Compare and contrast biomass and hydroelectricity as sources of energy.
Write any two advantages of using biogas.
What type of nuclear reaction is responsible for the liberation of energy:
in the sun?
What are fossil fuels?
Give an account of the use of solar energy.
Who is the odd one out?
Why is charcoal considered better fuel than wood?
Match the items given in Column I with the items of Column II.
| Column I | Column II |
| (a) Used for road surfacing | (i) Black gold |
| (b) Natural gas | (ii) Vaseline and candles |
| (c) Petroleum | (iii) Bitumen |
| (d) Paraffin wax | (iv) CNG |
Complete the crossword in figure with the help of the clues :
Across
1. Fuels obtained from dead remains of living organisms. (6, 5)
2. A process by which the various constituents of petroleum are separated. (8)
3. A porous black substance obtained from coal. (4)
4. Another name for motor fuel. (6)
Down
5. The substance obtained by carbonisation. (4)
6. Fuel for heavy motor vehicles. (6)
7. A petroleum product used for road surfacing. (7)
8. Dead remains of sea animals got converted into it. (9)
