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With the help of a neat diagram, explain...

With the help of a neat diagram, explain how the design of a box-type solar cooker ensures minimum loss of heat from its inside.

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(a) With the help of a labelled diagram, explain the construction and working of a solar cooker. (b) Why is the solar cooker box painted black from inside ? (c ) Why is the solar cooker box covered with a glass sheet ?

PRADEEP-SOURCES OF ENERGY-Mock Test
  1. Which of the following gases is a major consituent of biogas : Carbon ...

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  2. How is the increased demant for energy affecting our environment adver...

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  3. "Energy generated by the water stored in a dam can be considered to be...

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  4. State two advantages and two limitations of solar energy.

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  5. What are fossils fuels ? Name any three fossil fuels.

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  6. 1 g of coal on complete combustion liberates 18 k J of heat. Calculate...

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  7. In which forms is energy stored in oceans ? Mention any three forms th...

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  8. What is geothermal energy ? Give three merits of geothermal energy.

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  9. Why is biogas considered to be an ideal fuels ? Give four reasons.

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  10. Describe the processes that led to the formation of petroleum in natur...

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  11. Why is biogas superior or animal dung as a fuel ?

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  12. Draw a neat labelled diagram of a biogas plant.

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  13. Discuss one limitation each of extracting energy from : (a) water ...

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  14. The recent horrific storm surge flooding New Jersey and New york in US...

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  15. Explain what is meant by anaerobic degradation ?

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  16. What causes the wind to blow ? What is a wind energy farm ?

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  17. With the help of a neat diagram, explain how the design of a box-type ...

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  18. With the depletion of fossil fuels, we are facing serious energy crisi...

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  19. Describe the action of a windmill by drawing a simple diagram. How is ...

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  20. Energy from various sources is considered to have been derived from th...

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