Fundamentholfundamenthol
JEE Main2019Physics
Q.

Half lives of two radioactive nuclei A and B are 10 minutes and 20 minutes, respectively. If, initially a sample has equal number of nuclei, then after 60 minutes, the ratio of decayed numbers of nuclei A and B will be : 

  1. A

    9 : 8    

  2. B

    3 : 8 

  3. C

    8 : 1 

  4. D

    1 : 8 

Solution

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