A sample of radioactive material A, that has an activity of `10 mCi(1 Ci=3.7xx10^
Channel: Doubtnut
Date: 03/01/2020

A sample of radioactive material A, that has an activity of `10 mCi(1 Ci=3.7xx10^(10)decays//s)`, has twice the number of nuclei as another sample of a different radioactive material B which has an activity of 20 mCi. The correct choices for half-lives of A and B would then be respectively :