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Questions  >>  CBSE XII  >>  Physics  >>  Nuclei
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Q)

A radio active isotope has a half of T years. How long will it take the activity to reduce to $1\%$ of its original activity .

$\begin{array}{1 1} 6.65\;T\\ 66.5\;T \\ 0.665\;T \\ 0.0665\;T \end{array} $

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