JEE Main 2026 — Nuclear Physics Question with Solution
JEE Main 2026 (22 January Shift 1)
Question
-particle scatters from a target material of atomic number 79. From the given data the estimated diameter of nuclei of the target material is (approximately) m. and electron charge
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
For Rutherford scattering, at the closest approach all kinetic energy converts to electrostatic potential energy.
For alpha particle-nucleus collision:
Where: (alpha), (gold), MeV
m
The estimated nuclear diameter is approximately:
m
For alpha particle-nucleus collision:
Where: (alpha), (gold), MeV
m
The estimated nuclear diameter is approximately:
m
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This is a previous-year question from JEE Main 2026, covering the Nuclear Physics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.