JEE Main 2023PhysicsAtomic PhysicsMediumMCQ

JEE Main 2023 — Atomic Physics Question with Solution

JEE Main 2023 (01 Feb Shift 1)

Question

The mass of proton, neutron and helium nucleus are respectively 1.0073 u, 1.0087 u and 4.0015u. The binding energy of helium nucleus is:

Choose an option

Show full solutionCorrect option: B
Correct answer
B28.4 MeV

Step-by-step explanation

Given here,  mHe=4.0015 u, mp=1.0073 u and mn=1.0087 u.

Mass defect

 ∆m = 2mp+2mn-mHe=2×1.0073+2×1.0087-4.0015=0.0305 u

Binding energy 

E = ∆m×931 MeV=0.0305×931=28.4 MeV

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About this question

This is a previous-year question from JEE Main 2023, covering the Atomic 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.