A) 200
B) 150
C) 400
D) 360
Correct Answer: A
Solution :
In 8 seconds count rate becomes \[\frac{1}{16}\]times. |
\[\therefore \] 4 half lives \[=8s\] |
1 half life \[=2s\] |
In \[6s\]or 3 half lives, count rate\[=\frac{1600}{{{2}^{3}}}=200.\] |
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