Listen NCERT Audio Books - Kitabein Ab Bolengi
Why is the solar cooker box painted black from inside?
As we know that dark colors are a good conductor of heat. Therefore to absorb a large amount of heat solar cookers are painted black.
What is hydro electricity? Explain the basic principle of generation of hydroelectricity with the help of a labeled diagram.
State two advantage of producing hydroelectricity.
State two disadvantage of producing hydroelectricity.
With the help of a labeled diagram, explain the construction and working of a solar cooker.
Why is the solar cooker box covered with a glass sheet?
What is wind? What type of energy is possessed by wind?
Explain how, wind energy can be used to generate electricity. Illustrate your answer with the help of a labeled diagram.
State two advantage of using wind energy for generating electricity.
Mention two limitations of wind energy for generating electricity.