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Haryana PMT Haryana PMT Solved Paper-2003

  • question_answer
    A radioactive element has half-life period 1600 year. After 6400 year, what part of element will remain?

    A) \[\frac{1}{4}\]                                   

    B) \[\frac{1}{8}\]

    C) \[\frac{1}{16}\]                                  

    D) \[\frac{1}{2}\]

    Correct Answer: C

    Solution :

                    Number of half  lives \[=\frac{6400}{1600}=4\] So, amount of element left \[=\frac{1}{{{2}^{4}}}=\frac{1}{16}part\]


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