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Wind Mills

The power gen...

Question

The power generated in a windmill depends on the wind velocity of the region.

A

Is more in rainy season since damp air would mean more air mass hitting the blades

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B

Depends on the height of the tower

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Solution

The correct option is A
Is more in rainy season since damp air would mean more air mass hitting the blades

The wind makes the rotor spin; as the rotor spins, the movement of the blades results in the generation of electricity in a generator. So greater the velocity of the wind, greater is the power generated.

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Similar questions

Q. Question 11
The power generated in a windmill

(a) is more in rainy season since damp air would mean more air mass hitting the blades
(b) depends on the height of the tower
(c) depends on wind velocity
(d) can be increased by planting tall trees close to the tower

Q. Question 14
Choose the incorrect statement regarding wind power.

(a) It is expected to harness wind power to minimum in open space.
(b) The potential energy content of wind blowing at high altitudes is the source of wind power.
(c) Wind hitting at the blades of a windmill causes them to rotate The rotation thus achieved can be utilised further.
(d) One possible method of utilising the energy of rotational motion of the blades of a windmill is to run the turbine.

Q. The blades of a windmill sweep out a circle of area A.
(a) If the wind flows at a velocity v perpendicular to the circle, what is the mass of the air passing through it in time t?
(b) What is the kinetic energy of the air?
(c) Assume that the windmill converts 25% of the winds energy into electrical energy, and that A = 30

m^{2}

, v = 36 km/h and the density of air is 1.2 kg

m^{3}

. What is the electrical power produced?

Q. The blades of a windmill sweep out a circle of area

A

. If the wind flows at a velocity

v

perpendicular to the circle, then the mass of the air of density

ρ

passing through it in time

t

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