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JEE Main & Advanced Physics Nuclear Physics And Radioactivity Question Bank Radioactivity

  • question_answer
    Mean life of a radioactive sample is 100 seconds. Then its half-life (in minutes) is                                               [KCET 2005]

    A)            0.693                                       

    B)            1

    C)            10-4                                           

    D)            1.155

    Correct Answer: D

    Solution :

                       Mean life \[(T)=1/\lambda \] = 100 second            Half-life =\[\frac{0.693}{\lambda }=\frac{0.693\times 100}{60}\]=1.155 min.


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