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JEE Main & Advanced Physics Nuclear Physics And Radioactivity Question Bank Topic Test - Nuclear Physics and Radioactivity

  • question_answer
    Consider two nuclei of the same radioactive nuclide.  One of the nuclei was created in a supernova explosion 5 billion years ago. The other was created in a nuclear reactor 5 minutes ago. The probability of decay during the next time is

    A) Different for each nuclei

    B) Nuclei created in explosion decays first

    C) Nuclei created in the reactor decays first

    D) Independent of the time of creation

    Correct Answer: B

    Solution :

    [b] \[\lambda =\frac{0.693}{{{T}_{1/2}}}=\frac{0.693}{77}\]\[=9\times {{10}^{-3}}/day\].


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