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Write one use of wind energy (a) in the ...

Write one use of wind energy (a) in the past (b) at present.

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LAKHMIR SINGH & MANJIT KAUR-SOURCES OF ENERGY -Very Short Answer Type Questions
  1. Write one use of wind energy (a) in the past (b) at present.

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  2. Why is the copper tube of a solar water heater painted black from outs...

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  3. What type of reactions occurring inside the sun produce solar energy ?

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  4. What type of reflector is used in a box-type solar cooker ?

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  5. What is the range of temperature which can be achieved in a box-type s...

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  6. How much solar energy will be received by 1 m^(2) area in one hour if ...

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  7. What substance is obtained as a residue when wood is burned in a limit...

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  8. Name one source of energy which is not derived from solar energy direc...

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  9. What name is given to the heat energy obtained from hot rocks inside t...

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  10. Name the agent which decomposes animal dung into biogas.

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  11. Which component of biogas is used as a fuel ?

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  12. Name the constitutents of biogas.

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  13. Which of the following is needed for the formation of biogas from cow-...

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  14. Apart from cattle dung, what other substances can be added to a biogas...

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  15. Write two forms in which solar energy manifests itself in sea.

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  16. What is the function of anaerobic micro-organisms such as anaerobic ba...

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  17. Fill in the following blanks with suitable words : (a) Biomass is ...

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  18. What type of nuclear reaction is responsible for the liberation of ene...

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  19. Which product of the nuclear fission of uranium-235 is utilised to cau...

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  20. Which particles bring about the fission of uranium-235 ?

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