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प्रश्न
Why are control rods used in nuclear reactors?
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उत्तर
In the nuclear reactor, nuclear fission of nuclei to atoms like uranium or plutonium occurs. Control rods are used to speed up or slow down the chain reaction.
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संबंधित प्रश्न
State whether the fission of uranium-235 is caused by low energy neutrons or high energy neutrons.
Name the moderator used in a nuclear reactor.
How does inserting the control rods in the graphite core affect the fission in the reactor? Explain your answer.
Which produces more energy : nuclear fusion or nuclear fission?
Which of the following is used as a moderator in the reactor of a nuclear power station?
(a) liquid sodium
(b) boron
(c) graphite
(d) carbon dioxide
One type of energy which has not been controlled so far is:
(a) ocean thermal energy
(b) nuclear fusion energy
(c) geothermal energy
(d) nuclear fission energy
A nuclear reaction is represented by the following equation:
`""_92^235U+_0^1n-> _56^139Ba+_36^94Kr+xc+E`
What does E represent?
Give scientific reasons:
It is absolutely necessary to control the fission reaction in nuclear power plants.
The element X has an atomic mass number of 238 and an atomic number
of 92. It emits an alpha particle forming an element y. Y can be represented
by
Which one of the following statements about alpha and beta particles is
correct?
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.
The nucleus B emit a β-particle and is transformed into nucleus C. What is the composition of C?
State the energy conversion taking place in a solar cell.
What safety measures and needed in a nuclear power plant?
A certain nucleus X has a mass number 14 and atomic number 6. The nucleus X changes to `"_7Y^14` after the loss of a particle. A radioactive substance is oxidized. What change would you expect to take place in the nature of its radioactivity? Give a reason for your answer.
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.
A certain nucleus X has a mass number 15 and atomic number 7. Find the number of neutrons. The nucleus X losses one β-particle and Express the change and write the symbol of the new nucleus.
Write the merits of nuclear energy.
Why is nuclear fission useful to mankind?
