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प्रश्न
Observe the shape of blades of a fan and discuss the nature of the air flow when fan is switched on.
लघु उत्तरीय
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उत्तर
- The blades of a fan are slightly curved and inclined rather than flat.
- When the fan is switched on, the rotating blades push air and produce a continuous flow. The air moves mainly perpendicular to the plane of rotation.
Thus, the shape and inclination of the blades help the fan move a large amount of air efficiently.
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