NEET Sample Paper NEET Sample Test Paper-1

  • question_answer 42)   When a slow neutron captured by a \[{{U}^{235}}\]nucleus a fission results which release 200 MeV energy. Then the number of fission per second of nclei undergoing fission is:                             

    A)  \[5\times {{10}^{10}}\]                  

    B)  \[5\times {{10}^{12}}\]                   

    C)  \[5\times {{10}^{4}}\]                    

    D)  \[5\times {{10}^{10}}\]

    Correct Answer: D

    Solution :

    Here : Output Power   \[=1.6\,Mw\]                          \[=\text{ }1.6\times {{10}^{6}}\]Joule/sec,                           \[=\frac{1.6\times {{10}^{6}}}{1.6\times {{10}^{-13}}}={{10}^{19}}MeV/\sec \] Energy released per fission                     \[=220\,MeV\]         Now, the number of fission per second                   \[=\frac{{{10}^{19}}MeV/\sec }{200\,MeV}=5\times {{10}^{16}}\]

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