JEE Main 2024 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 1 February 2024, Shift 1, Physics Q60

Question 60 of 90 in this shift, Physics question 30 of 30, Section B.

The 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

\frac{1000}{x}

, where

x

is ________.

Official answer

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
31 Jan 2024, Shift 2 · Q47The mass number of nucleus having radius equal to half of the radius of nucleus with mass number 192 is:EasySingle correct
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.