A) 6 hours
B) 12 hours
C) 24 hours
D) 128 hours
Correct Answer: B
Solution :
\[N={{N}_{0}}{{\left( \frac{1}{2} \right)}^{n}}\]Or \[\frac{{{N}_{0}}}{64}={{N}_{0}}{{\left( \frac{1}{2} \right)}^{n}}\] |
\[\therefore \]\[N=6\] |
Now, \[t=n\,\,{{t}_{1/2}}\] |
\[=\text{ }6\times 2\] |
= 12 h. |
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