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प्रश्न
State two advantages and two disadvantages of using hydro-energy for producing electricity.
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उत्तर
Advantages:
(i) When electricity is generated, no greenhouse gases are made.
(ii) It is an inexhaustible source of energy.
Disadvantages:
(i) The dam is expensive to build.
(ii) By building a dam, the nearby area has to be flooded and this could affect nearby wildlife and Plants.
संबंधित प्रश्न
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
A cyclist doubles his speed. How will his kinetic energy change: increase, decrease or remain same ?
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A piece of stone placed on the roof.
Name the two groups in which various sources of energy are classified. State on what basis are they classified.
What is solar energy?
Name the energy changes for the following
human body
Give three examples of bodies possessing kinetic energy.
What kind of energy is possessed in a situation when?
A horse running along a level road
What is the main energy transformation that occur in:
Photosynthesis in green leaves.
State the energy changes which take place when:
During electrolysis.
