alleryStart learning →The mean life of a free neutron before it decays is about:
A5000 weeks
B1000 seconds
C2000 minutes
D3000 hours
Answer & Solution
Correct answer: B. 1000 seconds
1. A free neutron decays in a short while.
2. That while is measured in seconds.
3. The mean life is about 1000 seconds.
_Source: syllabus Physics Part II, Class XII, Chapter 13, Nuclei._
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