Which of the following wind energy conversion system may be built without yaw mechanism? O a. Up wind turbines and Vertical axis wind turbines O b. Horizontal axis wind turbines and Vertical axis wind...

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Extracted text: Which of the following wind energy conversion system may be built without yaw mechanism? O a. Up wind turbines and Vertical axis wind turbines O b. Horizontal axis wind turbines and Vertical axis wind turbines O c. Up wind turbines and Down wind turbines O d. Down wind turbines and Vertical axis wind turbines The amount of solar energy collected on a surface for 5 hours and another 5 hours 2.5 kWh/m2 and 5 kWh/m2 respectively. Calculate the average solar power received over this period. O a. 1000 W/m2 O b. 500 W/m2 O c. 600 W/m2 O d. 750 W/m2