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प्रश्न
State two advantages and disadvantages of using wind energy for producing electricity.
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उत्तर
Advantages:
(i) Wind is free and will run not (renewable sources).
(ii) Wind energy does not create greenhouse gases.
Disadvantages:
(i) The wind farms can be established only at places near the coastal areas where the wind blows around the year steadily with a speed not less than 15 Km h-1.
(ii) The establishment of the wind farm is expensive.
संबंधित प्रश्न
State two factors on which the kinetic energy of a moving body depends.
Two toy-cars A and B of masses 500 g and 200 g respectively are moving with the same speed. Which of the two has the greater kinetic energy?
Write an expression for the potential energy of a body of mass m placed at a height h above the earth's surface. State the assumptions made, if any.
How is wind energy used to produce electricity?
State the energy changes which take place when:
An air gun is loaded and then fired.
Give one example when:
Mechanical energy to heat energy.
Find out the types of energy from the following puzzle.

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