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Let $λ_{p} a n d λ_{d}$ be the decay constant of the parent and the daughter nuclei. If $N_{P} a n d N_{d}$ be the number of parent and daughter nuclei at time $t$ the condition that the daughter nuclei become constant is

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λpNp=λdNd

λpNd=λdNp

λpλd=NdNp

None of these

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detailed solution

Correct option is A

For daughter nuclei to become constant in number, −dNpdt=−dNddt or λpNp=λdNd .

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Let λp and λd be the decay constant of the parent and the daughter nuclei. If NP and Nd be the number of parent and daughter nuclei at time t the condition that the daughter nuclei become constant is

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Let $λ_{p} a n d λ_{d}$ be the decay constant of the parent and the daughter nuclei. If $N_{P} a n d N_{d}$ be the number of parent and daughter nuclei at time $t$ the condition that the daughter nuclei become constant is