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Saturday, 31 October

JEE Main 2023 · PhysicsMultiple choiceAssertion–reasonMediumConceptual

JEE Main 13 April 2023, Shift 2, Physics Q48

Question 48 of 90 in this shift, Physics question 18 of 30, Section A.

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : The binding energy per nucleon is practically independent of the atomic number for nuclei of mass number in the range 30 to 170. Reason R : Nuclear force is short ranged. In the light of the above statements, choose the correct answer from the options given below
  1. (1)Both A and R are true and R is the correct explanation of AOfficial answer
  2. (2)Both A and R are true but R is NOT the correct explanation of A
  3. (3)A is true but R is false
  4. (4)A is false but R is true

Official answer

Option 1

NTA final key.

Chapter
Nuclei
Topic
Nuclear Binding Energy
Idea tested
Stability Curve Interpretation

Same idea in other shifts

Asked 2× in all
  1. 1 Feb 2024, Shift 2 · Q47From the statements given below : (A) The angular momentum of an electron in nthn^{th} orbit is an integral multiple of ℏ\hbar. (B)…MediumOther

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.