JEE Main 2021 — Nuclear Physics Question with Solution
JEE Main 2021 (26 Feb Shift 2)
Question
A radioactive sample is undergoing decay, At any time its activity is and another time the activity is . What is the average life time for the sample ?
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
Let initial activity be
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Nuclear Physics chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2021, covering the Nuclear Physics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.