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J & K CET Medical J & K - CET Medical Solved Paper-2008

  • question_answer
    If \[\lambda \] is decay constant and N the number of radioactive nuclei of an element, then the decay rate (R) of that element is

    A) \[\lambda {{N}^{2}}\]                                   

    B) \[\lambda N\]

    C) \[\frac{\lambda }{N}\]                                  

    D) \[{{\lambda }^{2}}N\]

    Correct Answer: B

    Solution :

                     At any instant the rate of decay of radioactive atoms is proportional to the number of atoms present at that instant ie,\[-\frac{dN}{dt}\propto N\] where\[\lambda \]is decay constant.


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