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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
One of the following is not a characteristic of a good fuel. This is:
(a) high calorific value
(b) no emission of smoke
(c) smooth burning
(d) high ignition temperature
State one use of nuclear fission reactions.
Fill in the following blank with suitable word:
Nuclear .......... is used in nuclear power stations for the production of electricity.
how is heat removed from the reactor core, and what use is made of this heat?
How does inserting the control rods in the graphite core affect the fission in the reactor? Explain your answer.
What are the advantages and disadvantages of using nuclear fuel for generating electricity?
How is the working nuclear reactor of a power plant shut down in an emergency?
How much is this energy in MeV? (Speed of light = 3 × 108 m/s)
One eV (electron volt) of nuclear energy is equivalent of:
(a) 1.6 × 10−14 J
(b) 1.6 × 10−12 J
(c) 1.6 × 10−19 J
(d) 1.6 × 10−13 J
A nuclear reaction is represented by the equation:
`""_1^2H+_1^2H->_2^3He+xc+E`
What does E represent?
A nuclear reaction is represented by the equation:
`""_1^2H+_1^2H->_2^3He+xc+E`
What type of nuclear bomb is based on similar reactions?
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.
Which of the following statements are correct?
Neutrons have
What is the meaning of mass number?
Write down the Einstein's mass-energy equivalence relation, explaining the meaning of each symbol used in it.
What is the source of energy of sun or stars?
What changes occur in the nucleus of a radioactive element when it emits an alpha particle? Show by an example?
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?
An isotope of uranium is 92Y238, i.e., it has mass number 235 and atomic number 92.
Find the number of protons and neutrons in its nucleus.
Give scientific reasons.
It is absolutely necessary to control the fission reaction in nuclear power plants.
