Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At 
it was 
counts per second and 
seconds it was 
counts per second. The count rate observed, as counts per second, at 
seconds is close to:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
According to question, at 
and at 
in 
Activity at 
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