Advantages and Limitations of Wind Energy

Q.

What should be the minimum wind speed for the satisfactory working of a wind-powered electric generator?

Q.

State three limitations in harnessing wind energy.

Q. Write one use of wind energy (a) in the past (b) at present.

Q.

Assertion(A): As we move away from the surface of the Earth in the atmosphere, the temperature increases.

Reason(R): As we move away from the surface of the Earth, we are more close to the sun.

1. A and R are true and R is the correct explanation of A.

2. A and R are true, but R is not the correct explanation of A.

3. A is true but R is false.

4. Both A and R are false.

Q. Which of the following is responsible for the wind flow?

1. Windmill makes the wind flow.
2. Uneven heating of the earth surface.
3. Trees produce wind.
4. Evaporation.

Q.

Wind flows from high pressure region to low pressure region.

1. True

2. False

Q.

The pressure difference for movement of wind is created by?

1. Moon

2. Sun

3. None of the above

4. Earth’s Gravity

Q.

What is the average wind speed required for efficient harnessing of wind energy?

1. 1km/hr

2. 15km/hr

3. 100 km /hr

4. no fixed speed required

Q. What are the limitations of extracting energy from the wind​?

Q. The uneven heating of the earth's surface causes the wind to flow.

1. False
2. True

Q.

Question 22
What are the limitations in obtaining energy from wind?

Q. Wind flows because of which of the following reason?

1. Windmill makes the wind flow
2. Because of uneven heating of the Earth surface
3. Trees produce wind
4. None of these

Q.

Winds are caused by

1. wind

2. gravitation

3. sun

4. water

Q.

What are the advantages of wind energy?

1. renewable

2. Non-renewable

3. requires no recurring expenses for electricity generation.

4. eco-friendly

Q.

Why does wind flow?

1. Due to the uneven heating of the earths surface.

2. Trees produce wind

3. None of these

4. Due to windmills

Q. The minimum speed of wind necessary for the satisfactory working of a wind generator to produce electricity is about :
(a) 15 km/h (b) 25 km/h (c) 35 km/h (d) 45 km/h

Q.

How are winds formed?

1. uneven heating of earth by sun

2. gravitational pull of moon

3. solar wind of sun

4. all of these

Q.

What are the advantages of wind energy?

1. renewable

2. eco friendly

3. requires no recurring expenses for electricity generation

4. all of these

Q.

What is the average wind speed required for efficient harnessing of wind energy?

1. 1km/hr

2. 15km/hr

3. 100 km /hr

4. no fixed speed required

Q.

How is sunlight responsible for wind energy?

1. Differential heating of different landforms causes pressure difference.

2. Sunlight converts kinetic energy of air molecules to chemical energy.

3. Sunlight decreases friction in air and thus facilitates air movement.

4. Radiation coming from sun drags the air along itself.

Q. Wind flows from high pressure region to low pressure region.

1. True
2. False

Q. ……. energy of wind is used in wind mills.

Q.

What are the disadvantages of wind energy?

1. requires large area of land

2. can only be established at places where wind blows for major part of the year

3. needs backup facility to store energy during a period when there is no wind

4. all of these

Q. Why have a lot of countries still not adopted wind energy inspite of its potential?

1. High installation costs
2. Non-renewable source of energy
3. High maintenance costs
4. Low lifespan of windmills

Q.

Why do winds keep happening all the time ?