1. Which of the of the following is true? 
2. 
   
3. a$)$ For small inflow angle, the majority of the lift force will contribute towards the thrust force 
4. b$)$ The thrust force is used to drive the turbine and hence generate torque 
5. c$)$ Lift machines can operate at a speed higher than the wind speed 
6. d$)$ a and c 
7. e$)$ all

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