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

Same idea in other shifts

Asked 10× in all

7 Apr 2025, Shift 2 · Q44Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The density of…EasyAssertion–reason
8 Apr 2025, Shift 2 · Q44For a nucleus of mass number A and radius R, the mass density of nucleus can be represented asEasySingle correct
1 Feb 2024, Shift 1 · Q60The radius of a nucleus of mass number 64 is 4.8 fermi. Then the mass number of another nucleus having radius of 4 fermi is…EasyNumerical value
31 Jan 2024, Shift 2 · Q60A nucleus has mass number $A_1$ and volume $V_1$ . Another nucleus has mass number $A_2$ and Volume $V_2$ . If relation between mass number…EasyNumerical value
11 Apr 2023, Shift 2 · Q55A nucleus disintegrates into two nuclear parts, in such a way that ratio of their nuclear sizes is $1 : 2^{1/3}$ . Their respective speed…MediumNumerical value
26 Jul 2022, Shift 2 · Q49Mass numbers of two nuclei are in the ratio of 4:3. Their nuclear densities will be in the ratio ofEasySingle correct
29 Jul 2022, Shift 2 · Q41Read the following statements: (A) Volume of the nucleus is directly proportional to the mass number. (B) Volume of the nucleus is…EasyOther
25 Jun 2022, Shift 2 · Q47Which of the following figure represents the variation of $\ln\left(\frac{R}{R_0}\right)$ with $\mathrm{l}_n A$ (if $R$ = radius of a…EasyDiagram basedHas a figure

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 108 of the 174 JEE Main shifts held from 2017 to 2026.