Question

A fast moving neutron collides elastically and head on with a nucleus of $N_7^{14}$. The percentage of energy lost by the neutron during elastic collision is nearly.

• A. 20%
• B. 25%
• C. 50%
• D. 80%

Answer 1

The correct option is B 25%

As we know that the collision between neutron and Nitrogen nuclei is perfectly elastic collision

So we will use momentum conservation before and after collision