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Which is the wind direction showing device that spins perpendicularly?(a) Wind socks(b) Weather vane(c) Pin wheels(d) AnemometersThe question was posed to me by my school principal while I was bunking the class.Asked question is from Vertical Axis Wind Mill in division Wind Energy of Energy Engineering

Answer»

Right choice is (c) Pin wheels

Easiest explanation: A pinwheel is a windmill-style turbine that spins PERPENDICULARLY to the wind AFFECTING it. Like wind socks and WEATHER vanes, a pinwheel can be attached to a rotating BASE. This allows the pinwheel to change direction with the wind, and it will spin facing into the oncoming wind.



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