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प्रश्न
State two advantages and disadvantages of using wind energy for producing electricity.
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उत्तर
Advantages:
(i) Wind is free and will run not (renewable sources).
(ii) Wind energy does not create greenhouse gases.
Disadvantages:
(i) The wind farms can be established only at places near the coastal areas where the wind blows around the year steadily with a speed not less than 15 Km h-1.
(ii) The establishment of the wind farm is expensive.
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.
State the changes in form of energy while producing hydro electricity.
Name the physical quantity measured in terms of horse power.
How is the solar energy used to generate electricity in a solar power plant?
Explain the principle of producing electricity using the nuclear energy.
Identify the type of energy possessed by the body in each of the following:
(a) A coiled spring of the toy car
(b) A hammer which is raised
(c) A stone shot from a catapult
(d) Water stored in the overhead tank
(e) A tadpole moving in water.
What kind of energy is possessed in a situation when?
A stone, in a stretched catapult.
State the energy changes which take place when:
An air gun is loaded and then fired.
A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?
