BVP Medical BVP Medical Solved Paper-2010

  • question_answer
    The half-life period of a radioactive element is 140 days. After 560 days, 1 g of the element will be reduced to

    A)  \[\frac{1}{2}g\]                               

    B)  \[\frac{1}{4}g\]

    C)  \[\frac{1}{8}g\]                               

    D)  \[\frac{1}{16}g\]

    Correct Answer: D

    Solution :

                    \[t={{t}_{1/2}}\times n\] \[560=140\times n\] \[n=\frac{560}{140}=4\]                 \[N={{N}_{0}}\times {{\left( \frac{1}{2} \right)}^{n}}=1\times {{\left( \frac{1}{2} \right)}^{4}}\]                                 \[=\frac{1}{16}g\]


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