Nuclear Physics And Radioactivity Question 347
Three fourth of the active substance decays in a radioactive sample in 3/4 sec. The half life of the sample is [KCET (Engg.) 2001]
Options:
A) $ \frac{1}{2} $ sec
B) 1 sec
C) $ \frac{3}{8} $ sec
D) $ \frac{3}{4} $ sec
Show Answer
Answer:
Correct Answer: C
Solution:
$ \frac{1}{4}th $ active decay takes place in time $ t=2,({T_{1/2}}) $
Þ $ \frac{3}{4}=2,T_{1/2} $
Þ $ {T_{1/2}}=\frac{3}{8}\text{ sec} $
BETA
