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Q.

The minimum speed of the wind that is needed to generate electricity is_

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a

0.15 km / h .

b

1.5 km / h .

c

15

km / h .

d

150 km / h .

answer is C.

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Detailed Solution

The minimum speed of the wind that is needed to generate electricity is 15 km/h.
“A turbine which rotates due to the force exerted by the wind on its adjustable vanes or sails is called a windmill”.
The kinetic energy of wind is converted into mechanical energy, which can then be utilised in other usable forms of energy. The speed of the wind is an important element in turning the turbines in the windmills for the generation of electricity. The wind has limited speed, which reduces the resultant kinetic energy of the wind energy. Also, the speed of the wind is not the same everywhere. It can only be set up in highly windy areas or with a minimum wind speed of

15 km / h

.

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