Question
Which of the following is used as a moderator in nuclear
reactors?Solution
Moderators are used in nuclear reactors to slow down the speed of neutrons. By slowing the neutrons down the probability of a neutron interacting with Uranium235 nuclei is greatly increased thereby maintaining the chain reaction. The neutrons produced by nuclear fission are very fast. At that speed the probability of the neutron causing a fission with another uranium or plutonium becomes low. Neutrons become slow by colliding with a moderator and thus the probability of further fission increases. Solid graphite, heavy water are some of the moderators used. Hence, option D is correct.
Among the four works mentioned below which one is encyclopaedic in nature?
What is the applicability of the Workmen’s Compensation Act, 1923, as per the amendment made in 1995?
For outstanding contribution in which of the following sports did TP Ouseph win the Dronacharya Award for 2021?
Which one of the following statements about the situation in the Ryotwari areas is correct?
The I-V graph of three resistances R₁ ,R₂ and R₃ is shown in the figure below. The correct relation between R₁ R₂ and R₃ is:
In which of the following session Muslim league passed a resolution for the establishment of a separate homeland for the Muslims of British India?
Which of the following statements is true about the accounting equation?
Dr. Shankarbaba Pundlikrao Papalkar is known for his dedication to improving the lives of:
The principle that suggests recording expenses only when they are realized, and income only when they are certain, is known as:
Which of the following is/are the benefit of a stable population?
I. Less pressure on natural resources
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