The construction of turbine is different for different types of power plants.

Explanation

(i) Every power plant uses a different kind of source to rotate the turbine.
(ii) In thermal and nuclear power plants, steam produced rotates the turbine.
(iii) In hydroelectric power plant, flowing water is used to rotate turbines and wind is the medium in windmills.
(iv) Also the power output of every power plant is different.
(v) Hence, there should be turbines of different designs for different power plants.