Nuclear Physics And Radioactivity Question 377
Question: A radioactive sample at any instant has its disintegration rate 5000 disintegration per minute. After 5 minutes, the rate is 1250 disintegrations per minute. Then, the decay constant (per minute) is [AIEEE 2003]
Options:
A) 0.8 In 2
B) 0.4 In 2
C) 0.2 In 2
D) 0.1 In 2
Show Answer
Answer:
Correct Answer: B
Solution:
$ \lambda =\frac{{\log_{e}}\frac{A_{1}}{A_{2}}}{t}=\frac{{\log_{e}}\frac{5000}{1250}}{5} $ = 0.4 In 2
BETA
