Work Energy And Power Question 123
Question: A neutron makes a head-on elastic collision with a stationary deuteron. The fractional energy loss of the neutron in the collision is [AIIMS 2003]
Options:
A) 16/81
B) 8/9
C) 8/27
D) 2/3
Show Answer
Answer:
Correct Answer: B
Solution:
Fractional decrease in kinetic energy of neutron = $ 1-{{( \frac{m_1-m_2}{m_1+m_2} )}^{2}} $ [As $ m_1=1 $ and $ m_2=2 $ ] $ =1-{{( \frac{1-2}{1+2} )}^{2}} $
$ =1-{{( \frac{1}{3} )}^{2}}=1-\frac{1}{9}=\frac{8}{9} $
