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

  • question_answer
    A freshly prepared radioactive sample of half- life 1 hour emits radiations that are 128 times as intense as the permissible safe limit. The minimum time after which this sample can be safely used is                                           [KCET 1996]

    A)            14 hours                                 

    B)            7 hours

    C)            128 hours                              

    D)            256 hours

    Correct Answer: B

    Solution :

               Similar to Q. 40.


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