A radioactive nucleus decays by two different processes.

Question:

A radioactive nucleus decays by two different processes. The half life for the first process is $10 \mathrm{~s}$ and that for the second is $100 \mathrm{~s}$. the effective half life of the nucleus is close to:

  1. $9 \mathrm{sec}$

  2. $55 \mathrm{sec}$

  3. $6 \mathrm{sec}$

  4. $12 \mathrm{sec}$


Correct Option: 1

Solution:

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