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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctHardMulti-step

JEE Main 25 July 2022, Shift 2, Physics Q33

Question 33 of 90 in this shift, Physics question 3 of 30, Section A.

A drop of liquid of density ρ\boldsymbol{\rho} is floating half immersed in a liquid of density σ\boldsymbol{\sigma} and surface tension 7.5×10−47.5 \times 10^{-4} Ncm−1^{-1}. The radius of drop in cm will be : (g = 10ms−2^{-2})
  1. (1)15(2ρ−σ)\frac{15}{\sqrt{(2\rho - \sigma)}}Official answer
  2. (2)15(ρ−σ)\frac{15}{\sqrt{(\rho - \sigma)}}
  3. (3)32(ρ−σ)\frac{3}{2\sqrt{(\rho - \sigma)}}
  4. (4)320(2ρ−σ)\frac{3}{20\sqrt{(2\rho - \sigma)}}

Official answer

Option 1

NTA final key.

Chapter
Mechanical Properties of Fluids
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.