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Saturday, 31 October

JEE Main · Physics · Nuclei

Nuclear Radius and Density

JEE Main asked Nuclear Radius and Density 10 times in 9 of the 108 shifts Lumi analysed, in 2020, 2022, 2023, 2024 and 2025. It belongs to Nuclear Binding Energy, in Nuclei (Physics). The longest wait between two years asking it was 2 years. In 2022, 2024 and 2025 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
10
in 9 shifts
Years
5 of 8
First asked
2020
last in 2025
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2022, 2023, 2024 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.150.30’170.08’200’210.10’220.07’230.14’240.25’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 3 in 24 shifts · 2023: 1 in 12 shifts · 2024: 3 in 18 shifts · 2025: 2 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20252 of 8
  • 202422 of 18
  • 20231 of 12
  • 20223 of 24
  • 20210 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: conceptual.

  • Assertion-reason on nuclear radius and density
  • Dependence of nuclear density on mass number

Difficulty

Easy 9Medium 1Hard 0

3 of the 10 questions had a numerical answer.

Every question

All 10 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 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
  2. 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
  3. 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
  4. 31 Jan 2024, Shift 2 · Q60A nucleus has mass number A1A_1 and volume V1V_1. Another nucleus has mass number A2A_2 and Volume V2V_2. If relation between mass number…EasyNumerical value
  5. 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
  6. 11 Apr 2023, Shift 2 · Q55A nucleus disintegrates into two nuclear parts, in such a way that ratio of their nuclear sizes is 1:21/31 : 2^{1/3}. Their respective speed…MediumNumerical value
  7. 25 Jun 2022, Shift 2 · Q47Which of the following figure represents the variation of ln⁡(RR0)\ln\left(\frac{R}{R_0}\right) with lnA\mathrm{l}_n A (if RR = radius of a…EasyDiagram basedHas a figure
  8. 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
  9. 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
  10. 3 Sep 2020, Shift 2 · Q18The radius R of a nucleus of mass number A can be estimated by the formula R=(1.3×10−15)A1/3R = (1.3 \times 10^{-15})A^{1/3} m. It follows that the mass…EasySingle correct

Shifts: 3 Sep 2020, Shift 2, 25 Jun 2022, Shift 2, 26 Jul 2022, Shift 2, 29 Jul 2022, Shift 2, 11 Apr 2023, Shift 2, 31 Jan 2024, Shift 2, 1 Feb 2024, Shift 1, 7 Apr 2025, Shift 2, 8 Apr 2025, Shift 2.

Same topic

Other ideas in Nuclear Binding Energy

Nuclear Binding Energy has 11 ideas JEE Main has asked; 8 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas