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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2002

  • question_answer
    In a sample of radioactive material, what percentage of the initial number of active nuclei will decay during one mean life?

    A)  63 %

    B)  69.3 %

    C)  37 %

    D)  50 %

    Correct Answer: B

    Solution :

     Mean life\[=\frac{1}{\lambda }\] \[{{T}_{({\scriptstyle{}^{1}/{}_{2}})}}=\frac{0.693}{\lambda }\] \[{{T}_{({\scriptstyle{}^{1}/{}_{2}})}}=0.693(l)\]mean life\[69.3%.\]


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