JEE Main 2012 — Nuclear Physics Question with Solution
JEE Main 2012 (26 May Online)
Question
The counting rate observed from a radioactive source at was 1600 counts , and , it was 100 counts . The counting rate observed as counts at will be
Choose an option
Show full solutionCorrect option: D
Correct answer
D200
Step-by-step explanation
As we know,
From (i) and (ii) we get
or,
, Therefore, in 8 seconds 4 half life had occurred in which counting rate reduces to 100 counts .
Half life,
In half life will occur
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This is a previous-year question from JEE Main 2012, 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.