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प्रश्न
What is nuclear energy? Name the process used for producing electricity using the nuclear energy.
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उत्तर १
When a heavy nucleus is bombarded with slow neutrons, it splits into two nearly equal light nuclei with a release of tremendous amount of energy. In this process of nuclear fission, the total sum of masses of products is less than the total sum of masses of reactants. This lost mass gets converted into energy. The energy so released is called nuclear energy.
Principle: The heat energy released due to the controlled chain reaction of nuclear fission of uranium-235 in a nuclear reactor is absorbed by the coolant which then passes through the coils of a heat exchanger containing water. The water in heat exchanger gets heated and converts into steam. The steam is used to rotate the turbine which in turn rotates the armature of a generator in a magnetic field and thus produces electricity.
उत्तर २
Nuclear energy is the energy released by the atom’s nucleus during a nuclear reaction. It is an exothermic process. The process of Nuclear fission is used to produce electricity.
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संबंधित प्रश्न
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
State one use of nuclear fission reactions.
A nuclear reaction is represented by the following equation:
`""_92^235U+_0^1n-> _56^139Ba+_36^94Kr+xc+E`
Identify the particle c and the number x of such particles produced in the reaction.
Explain why, in a nuclear reactor, the chain reaction stops if the control rods are fully inserted into the graphite.
Give scientific reasons:
It is absolutely necessary to control the fission reaction in nuclear power plants.
State, giving reason, whether the following nuclear decay is allowed or not?
\[\ce{_Z^AX -> _Z^AQ + γ}\]
What will an alpha particle change into when it absorb one electron.
An element X has the symbol 84X202. It emits an alpha-particle and then a beta-particle. The final nucleus is bYa. Find a and b.
An isotope of uranium is 92Y238, i.e., it has mass number 235 and atomic number 92.
What is the number of protons in 92U238?
When neutron is bombarded on atom of Uranium-235, it absorbs the neutron and converts into ______.
