12. Today teacher taught in the class that the rotational speed of the wind mill is used to rotate the turbine of the power generator to generate electricity. What should be the minimum speed of wind to maintain the turbine's required speed? a. Less than 15 km/h b. More than 15 km/h c. Less than 10 km / h d. Less than 5 Km/h
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A wind turbine turns wind energy into electricity using the aerodynamic force from the rotor blades, which work like an airplane wing or helicopter rotor blade. When wind flows across the blade, the air pressure on one side of the blade decreases
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