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JEE PHYSICS MCQ: NUCLEI

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A radioactive nucleus can decay simultaneously by two different processes which have decay constant λ1  and  λ2{\lambda _1}\,\,\mathrm{and}\,\,{\lambda _2}.The effective decay constant of the nuclide is λ,\lambda , where
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Correct option: A
λ=λ1+λ2\lambda = {\lambda _1} + {\lambda _2}
Option A (λ=λ1+λ2\lambda = {\lambda _1} + {\lambda _2}) is correct because when a nucleus decays simultaneously by two processes, the effective decay constant is the sum of the individual decay constants.

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