Questions
The count rate of a Geiger Muller counter for the radiation of a radioactive material of half life 30 minutes decreases to 5 after 2 hour’s . The initial count rate was
detailed solution
Correct option is A
Half Life=T1/2=30 min Total time = 2 hrs = 120 min Decay Law, NNo=12tT12=1212030=124 ⇒No=24N=16×5=80 sec−1Talk to our academic expert!
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