OT- 46

Passage-

The high speed winds have a lot of energy in them as kinetic energy, due to their motion. The driving force of the wind is the sun. The wind energy is harnessed by making use of wind mills, The blades of the wind mill keep on rotating continuously due to the force of the striking wind. A large number of wind mills are installed in clusters called wind farms. These farms are ideally located in coastal regions, open grasslands or hilly regions, particularly mountain passes and ridges where the winds are strong and steady. Wind energy is very useful as it does not cause any air pollution. After the initial installation cost, the wind energy is very cheap. It is believed that by the middle of the century wind power would supply more than 10% of world’s electricity.

1. What are wind farms?

(a) The force of the striking wind

(b) High speed winds having a lot of energy in them

(c) Large number of wind mills installed in clusters

(d) Working of a wind generator

2. Where are the farms located?

(a) In places where there are lots of houses

(b) In industrial areas

(c) In areas where there are water pumps and flour mills

(d) In areas where the winds are strong and steady

3. What is the driving force of the winds?

(a) The electric generators

(b) The sun

(c) The atmosphere

(d) The continuous rotation

4. How is wind energy harnessed?

(a) By constructing a barrage

(b) By providing commercial energy

(c) By using steam turbine

(d) By making use of wind mills

5. Why is wind energy useful?

(a) It can generate a lot of electricity.

(b) It does not cause any air pollution.

(c) It is easily affordable.

(d) It can be utilized on a range.