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

  • question_answer
    A radioactive sample with a half-life of 1 month has the label: ?Activity=2 micro curies on 1.8.1991.'' What will be its activity two months later                                                    [CBSE PMT 1992]

    A)            1.0 micro curies                   

    B)            0.5 micro curies

    C)            4 micro curies                       

    D)            8 micro curies

    Correct Answer: B

    Solution :

               In two half lives, the activity becomes one fourth.


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