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प्रश्न
Explain the principle of working of the windmill for generating electricity.
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उत्तर
It works on the principle of conversion of the kinetic energy of blowing wind into electrical energy. When the blowing wind strikes across the blades of a windmill it exerts a force that rotates its blade. The turning of the blades would simultaneously cause the shaft to turn, which is connected to a generator. This makes the generator produce electricity.
संबंधित प्रश्न
(i) The conversion of part of the energy into an undesirable form is called ______________.
(ii) For a given height h, __________________ the length l of the inclined plane, lesser will be the effort required.
What name is given to the heat energy obtained from hot rocks inside the earth?
Give one relevant example for the following transformation of energy :
Electrical energy to light energy.
A body of mass m is moving with a velocity v. Write the expression for its kinetic energy.
Name the two groups in which various sources of energy are classified. State on what basis are they classified.
Name five renewable sources of energy.
State the energy changes which take place when:
A magnesium ribbon burns in air.
Give one example when:
Heat energy changes to kinetic energy.
Give one example when:
Electric energy changes to mechanical energy.
Find out the types of energy from the following puzzle.
