Atoms And Nuclei Question 258
Question: If in a nuclear fission, piece of uranium of mass 0.5 g is lost, the energy obtained in kWh is [Pb. PET 2003]
Options:
A) $ 1.25\times 10^{7} $
B) $ 2.25\times 10^{7} $
C) $ 3.25\times 10^{7} $
D) $ 0.25\times 10^{7} $
Show Answer
Answer:
Correct Answer: A
Solution:
$ E=\Delta mc^{2}=0.5\times {{10}^{-3}}\times {{(3\times 10^{8})}^{2}}=4.5\times 10^{13}j $
$ \Rightarrow E=\frac{4.5\times 10^{13}}{3.6\times 10^{6}}=1.25\times 10^{7}kWH. $
