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प्रश्न
State two disadvantages of using wind energy for generating electricity.
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उत्तर
Disadvantages of using wind energy:
1. The establishment of a wind farm is expensive.
A large area of land is needed for the establishment of a wind farm.
संबंधित प्रश्न
Name five different forms of energy.
A ball is made to fall freely from a height. State the kind/ kinds of energy possessed by the ball when it is at the ground.
A body of mass m is moving with a velocity v. Write the expression for its kinetic energy.
What is a solar cell?
Show that the quantity 2K/v2 has the unit of mass, where K is the kinetic energy of the body.
Give one example when:
Kinetic energy changes to heat energy.
A ball of mass 200 g falls from a height of 5 m. What will be its kinetic energy when it just reaches the ground? (g = 9.8 m s−2)
For the same kinetic energy of a body, what should be the change in its velocity if its mass is increased nine times?
In a hydroelectric power station, 1000 kg of water is allowed to drop through a height of 100 m in 1 sec. If the conversion of potential energy to electric energy is 60%. Calculate the power output. [Take: g = 10m/sec2]
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A moving cricket ball
