JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 31 January 2024, Shift 2, Physics Q47

Question 47 of 90 in this shift, Physics question 17 of 30, Section A.

The mass number of nucleus having radius equal to half of the radius of nucleus with mass number 192 is:

(1)20
(2)32
(3)24Official answer
(4)40

Official answer

Option 3

NTA final key.

Chapter: Nuclei
Topic: Nuclear Binding Energy
Idea tested: Nuclear Radius and Density

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Asked 4× in all

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.