Answer: D
A wind turbine is a device that converts wind energy into electrical energy. The wind wheel of the wind turbine mainly converts the wind energy passing through the wind wheel into kinetic energy. The wind speed after passing through the rotor will decrease due to the transfer of kinetic energy. Bates' law states that as air flow passes through an area, as it slows down after losing energy to extract energy from the turbine, it must spread to a larger area. area. A large area. The geometry therefore limits the efficiency of the turbine to 59.6%.