Physics-Kinetic Energy
NEET Physics Kinetic Energy MCQ Question
Type: MCQ-numerical-Hard-Class 11
A neutron with an initial speed of 10^7 m/s undergoes an elastic collision with a deuterium nucleus at rest. If the neutron's final speed is 10^3 m/s, what percentage of the neutron's initial kinetic energy is transferred to the deuterium nucleus?
A
80%
B
90%
C
10%
D
50%
Correct Answer
Option B
Detailed Explanation
The fractional kinetic energy transferred to deuterium in an elastic collision is given by f2 = 1 - f1, where f1 = 1/9 for deuterium. Thus, f2 = 8/9, which is approximately 90%.
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