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प्रश्न
Write the problems associated with hydroelectric power projects.
Write two problems associated with hydroelectric power plant.
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उत्तर
- The back-water due to storage of water in a dam may submerge villages or towns in that area. This leads to the problems of rehabilitation of the displaced population. Moreover, this can also submerge forests as well as fertile land.
- The obstruction of the flow of river water may have an adverse effect on the living world in the river.
संबंधित प्रश्न
Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?
Arrange the following fuels in the order of decreasing calorific values (keeping the fuel with highest calorific value first):
Biogas, Kerosene, Wood, Petrol, Hydrogen gas, Methane
Arrange the following fuels in the order of increasing calorific values (keeping the fuel with lowest calorific value first):
LPG, Coal, Alcohol, Dung cakes, Diesel
Which one of the following is not renewable energy technology?
Describe the process by which energy is released in the sun. Write the equation of the nuclear reaction involved.
The following question are about the nuclear reactor of a power plant.
Will the fuel rods last for ever?
What is a nuclear reactor? What is the fuel used in a nuclear reactor?
How is the working nuclear reactor of a power plant shut down in an emergency?
An uncontrolled nuclear chain reaction forms the basis of:
(a) nuclear power plant
(b) hydrogen bomb
(c) thermal power station
(d) atom bomb
A nuclear reactor has half the length of all its control rods inserted in graphite. What must be done so that the reactor produces more heat? Explain your answer.
What is the meaning of mass number?
Name the following nuclear reaction:
\[\ce {^235_92U +^1_0n-> ^90_38Sr + ^143_54Xe + 3^1_0n + γ}\]
A radioactive nucleus undergoes a series of decays according to the sequence
\[\ce{X->[β] X1->[α] X2->[α]X3}\]
If the mass number and atomic number of X3 are 172 and 69 respectively, what is the mass number and atomic number of X?
What changes occur in the nucleus of a radioactive element when it emits an alpha particle? Show by an example?
What will an alpha particle change into when it absorb two electrons.
When an alpha particle gains two electrons it becomes neutral and becomes an atom of an element which is a rare gas. What is the name of this rare gas?
Complete the following fission reaction:
\[\ce{_92U^235 _0n^1 -> _aSb^133 + _41Co^b + 4_0n_1 + energy}\]
Write down the values of a and b.
An element 92U238 losses one alpha particle, and then one β-particle and then again one β- particle to get the final nucleus bQa.
(i) Write down the values of a and b.
(ii) State the relationship between the nuclei P and Q.
Thermal power generation : Air pollution : : Nuclear power generation : _____________
