Home › CBSE Class 11 › Physics › c9kineticenergy › Per NCERT Example 5.11, in an elastic collision …
Per NCERT Example 5.11, in an elastic collision between a neutron and DEUTERIUM (m₂ = 2 m₁), the fraction of neutron KE transferred to deuterium is approximately which?
A1/2 (≈ 50%)
B1/9 (≈ 11%)
C8/9 (≈ 89%)
D1 (full transfer)
Answer & Solution
Correct answer: C. 8/9 (≈ 89%)
NCERT Ex 5.11: f₂ = 4 m₁ m₂ / (m₁ + m₂)² = 4·1·2 / 9 = 8/9 ≈ 89%. Why D₂O is a good moderator.
Related questions
A crate dragged across a rough floor loses mechanical energy because friction is:Conservation of mechanical energy is the form the work-energy theorem takes when the forceCalculating work for a conservative force is easier than for a complicated path because itA force acting entirely perpendicular to an object's displacement does how much work?Mechanical energy transferred into or out of a system equals the work done by an external Winding up a toy or an old-fashioned watch stores energy by doing work against its:Which three energy examples are named together?The kinetic energy in the work-energy theorem is specifically the translational kinetic en