Physics · 2021
JEE Main · 4 August 2021, Shift 2 · Q17
A neutron of mass m_n collides against a moderator nucleus of mass 10 m_n at rest. Considering the collision to be one dimensional, the fractional…
A neutron of mass $\displaystyle m_n$ collides against a moderator nucleus of mass $\displaystyle 10 m_n$ at rest. Considering the collision to be one dimensional, the fractional kinetic energy lost by the neutron $\displaystyle \left(\mathrm{f}_1\right)$ is [Given : The collision is elastic]
Official answer
(2)
$\displaystyle 0.33$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.