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Friday, 9 October

JEE Main 2023 · PhysicsMultiple choiceAssertion–reasonMediumMulti-step

JEE Main 13 April 2023, Shift 2, Physics Q36

Question 36 of 90 in this shift, Physics question 6 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 : A spherical body of radius (5±0.1)(5\pm0.1) mm having a particular density is falling through a liquid of constant density. The percentage error in the calculation of its terminal velocity is 4%4\%. Reason R : The terminal velocity of the spherical body falling through the liquid is inversely proportional to its radius. 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 A
  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 falseOfficial answer
  4. (4)A is false but R is true

Official answer

Option 3

NTA final key.

Chapter
Mechanical Properties of Fluids
Topic
Viscosity
Idea tested
Terminal Velocity Radius Proportionality

Same idea in other shifts

Asked 2× in all
  1. 8 Apr 2026, Shift 2 · Q34A spherical liquid drop of radius RR acquires the terminal velocity v1v_1 when falls through a gas of viscosity η\eta. Now the drop is…MediumSingle correct

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.