JEE Main 2024 — Nuclear Physics Question with Solution
JEE Main 2024 (01 Feb Shift 2)
Question
(A) The angular momentum of an electron in orbit is an integral multiple of .
(B) Nuclear forces do not obey inverse square law.
(C) Nuclear forces are spin dependent.
(D) Nuclear forces are central and charge independent.
(E) Stability of nucleus is inversely proportional to the value of packing fraction.
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Show full solutionCorrect option: C
Step-by-step explanation
(A) Electron revolves around nucleus only in those orbits for which the angular momentum is an integral multiple of .
(B) Nuclear force does not follow the inverse square law.
(C) Nuclear forces are spin dependent but charge independent.
(D) Nuclear force is attractive in nature. It is a non central force, meaning it does not depend upon the distance between the particles but rather upon their orientation. Nuclear force is stronger if the spin is parallel; and weak if it is anti parallel.
(E) The negative value (less quantity) of packing fraction indicates that the isotope is stable. Positive value of packing fraction implies unstable (radioactive) nucleus. Also, the stability of the nucleus is inversely proportional to the value of the packing fraction.
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This is a previous-year question from JEE Main 2024, 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.