Question:
A neutron moving with speed v makes a head-on collision with a hydrogen atom in ground state kept at rest. The minimum kinetic energy of the neutron for which inelastic collision takes place is
A neutron moving with speed v makes a head-on collision with a hydrogen atom in ground state kept at rest. The minimum kinetic energy of the neutron for which inelastic collision takes place is
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Equal-mass collisions transfer only half the kinetic energy.
Updated On: Mar 20, 2026
- \(10.2\,\text{eV}\)
- \(20.4\,\text{eV}\)
- \(12.1\,\text{eV}\)
- 16.8eV
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The Correct Option is B
Solution and Explanation
Step 1: For excitation of hydrogen atom: Emin = 10.2eV
Step 2: In head-on elastic collision of equal masses, only half energy is transferred. K = 2 × 10.2 = 20.4eV
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