ICSE Class 10 Physics 2018 Solved Paper

The ore of Uranium found in nature contains ‌92U238 and ‌92U235. Although both the isotopes are fissionable, it is found out experimentally that one of the two isotopes is more easily fissionable.

Question : 73

Total: 78

Give a reason for your answer.

Solution:

The reason is that the fission of ‌92U238 nucleus is possible only by the fast neutrons, while the fission of ‌92U235 nucleus can be even by the slow neutrons.

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