Physics
Grade-10
Easy
Question
Select two appropriate disadvantages of Hydel Power out of the following
A. Less power generated
B. Water table is altered
C. Natural river flow is obstructed
D. Not economically viable
- A and B
- B and C
- C and D
- A and D
Hint:
Hydropower, or hydroelectric power, is a renewable source of energy that generates power by using a dam or diversion structure to alter the natural flow of a river or other body of water.
The correct answer is: B and C
Disadvantages In hydro electric plants are :
- Dams are constructed in hilly areas, hence only a limited number of places.
- Large areas of agricultural land and human habitation are sacrificed as they get submerged.
- The vegetation which is submerged rots under anaerobic conditions and methane is released contributing to green house effect.
- Expensive to build
- Limited reserves
- Drought potential
- Natural river flow is obstructed
- So C and D are correct
- Large areas of agricultural land and human habitation are sacrificed as they get submerged.
- The vegetation which is submerged rots under anaerobic conditions and methane is released contributing to green house effect.
- Expensive to build
- Limited reserves
- Drought potential
- Natural river flow is obstructed
- So C and D are correct
