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Which sample, A or B, shown in the follo...

Which sample, A or B, shown in the following figure has shorter mean life?

Text Solution

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`N=N_(0)e^(-lambdat)`
`rArr (dN)/(dt) =-N_(0)lambdae^(-lambdat)`
From the graph, we can understand `lambda_(B) gt lambda_(A)`.
Also mean life is
`tau = 1//lambda`.
So, `tau_(B) lt tau_(A)`
Thus, the mean life of sample B is shorter than that of sample A.
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