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A group of students went on an educational tour of Bhabha Atomic Research Centre, Mumbai. They…
(a)
A group of students went on an educational tour of Bhabha Atomic Research Centre, Mumbai. They visited various nuclear reactors like Apsara, Cirus, Zerlina and Dhruv and observed that Apsara was a swimming pool type reactor. The teacher explained how water slows down fast moving neutrons and absorbs the heat produced in the reactor.
(1) What is the use of a nuclear reactor?
(2) What is the name given to a material which slows down fast moving neutrons?
(3) State how a nuclear reactor can be shut down in case of an emergency.
(b)
(1) What is meant by the statement: ‘Angular momentum of an orbiting electron is quantised’?
(2) What is the physical significance of the fact that total energy of an orbiting electron is negative?
Answer
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From ISC 2025 Physics Paper 1, question 19(ii).