Chain Reaction
Chain Reaction
Chain Reactions :
Suppose a slow neutron is absorbed by a nucleus of U-235 in a block of uranium. In the resulting U-236 nucleus fission takes place, and in the process 2 or 3 neutrons are emitted. These neutrons can be absorbed by other U-235 nuclei, starting other fission reactions, from which neutrons are emitted. In this way, the fission reaction continues by itself, without requiring any further external neutrons. One fission triggers another fission, in a self-sustaining sequence of fission reactions.
A reaction that continues on its own as one occurrence of the reaction triggers the next occurrence is called a chain reaction.
Which of the following are correct ? (a) In the chain reactions of fission of U-236 a slow neutron is absorbed by a nucleus of U-235 in a block of uranium. (b) The neutrons emitted during fission of U-236 can be absorbed by other U-235 nuclei, starting other fission reactions, from which more neutrons are emitted. | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct ? (a) A reaction that continues on its own as one occurrence of the reaction triggers the next occurrence is called a chain reaction. (b) The rate of a chain reaction in the case of U235 can be controlled with materials that absorb protons. | |||
| Right Option : A | |||
| View Explanation | |||
The neutrons released in a fission reaction can be absorbed by other __________________ nuclei, starting other fission reactions, from which more neutrons are emitted. | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [10]
My experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
