Choose the incorrect statement regarding wind power.

Options

A. It is expected to harness wind power to minimum in open space.
B. The potential energy content of wind blowing at high altitudes is the source of wind power.
C. Wind hitting at the blades of a windmill causes them to rotate. The rotation thus achieved can be utilised further.
D. One possible method of utilising the energy of rotational motion of the blades of a windmill is to run the turbine of an electric generator.

Answer

A, B, D

Explanation

Maximum wind power is harnessed in open space hence, option (a) is wrong.
Moving air has kinetic energy which on hitting at the blades of a windmill causes them to rotate. To generate wind power, we require wind at a very high speed. Due to this motion it possesses kinetic energy so that they are capable of doing mechanical work by virtue of its motion.
The energy possessed by the wind is due to its high speed. When the blowing wind strikes across the blades of a windmill, it exerts a force on them due to which the blades of the windmill start rotating. This rotational motion of the blades is used to run the turbine of an electric generator. Thus, the option (b) is the incorrect statement.