How is wind energy used in wind mills?
In wind mills, wind energy is used to turn mechanical machinery to do physical work, like crushing grain or pumping water.
Select the correct statements from the following.
(i) Wind energy is renewable source of energy.
(ii) Installation cost of wind mill is low.
(iii) Wind mills are generally installed in populated areas.
(iv) Energy produced from wind mills is non-polluting.
How does a wind mill generate electric energy ?