InterviewSolution
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InterviewSolution
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Two samples A and B of same radioactive nuclide are prepared. Sample A has twice the initial activity of sample B. For this situation, mark out the correct statement (s).A. The half-lives of both the samples would be same.B. The half-lives of the samples are different.C. After each has passed through `5` half-lives, ratio of activity of `A` to `B` is `2:1`.D. After each has passed through `5` half-lives, ratio of activity of `A` to` B` is `64:1`. |
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Answer» Correct Answer - a,c Half -lives of both the samples would be same as half-life is the property of radioactive material and is independent of number of nuclei present or its activity. Let `R_(0) B =R_(0)`, then `R_(0) A=2B_(0)`, where `R_(0)` denotes initial activity. Activity of `A` after `5` half-lives is `R_(A) =(R_(0A))/(2^(5))=(2R_(0))/(2^(5))a` Activity of `B` after half-lives is `R_(B)=(R_(0B))/(2^(5))=(R_(0))/(2^(5))` `:. (R_(A))/(R_(B))=(2)/(1)` . |
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