Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsRadioactivityEasy2 minPYQ_2020
PhysicsEasysingle choice

A radioactive substance X decays into another radioactive substance Y. Initially only X was present.λxandλyare the disintegration constants of X and Y.NxandNyare the number of nuclei of X and Y at any time t. Number of nucleiNywill be maximum when:

Options:

Answer:
C
Solution:

Net rate of formation of Y at any time t is:

dNydt=λxNx-λyNy

Nyis maximum whendNydt=0

orλyNy=λxNx

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Radioactivity
⏱ 2mℹ️ Source: PYQ_2020

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