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Saturday, 31 October

JEE Main 2023 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 11 April 2023, Shift 2, Physics Q36

Question 36 of 90 in this shift, Physics question 6 of 30, Section A.

Eight equal drops of water are falling through air with a steady speed of 10 cm/s10\ \mathrm{cm/s}. If the drops coalesce, the new velocity is:-
  1. (1)5 cm/s5\ \mathrm{cm/s}
  2. (2)10 cm/s10\ \mathrm{cm/s}
  3. (3)16 cm/s16\ \mathrm{cm/s}
  4. (4)40 cm/s40\ \mathrm{cm/s}Official answer

Official answer

Option 4

NTA final key.

Chapter
Mechanical Properties of Fluids
Topic
Viscosity
Idea tested
Terminal Velocity of Coalescing Drops

Same idea in other shifts

Asked 2× in all
  1. 8 Apr 2024, Shift 2 · Q53Small water droplets of radius 0.01 mm are formed in the upper atmosphere and falling with a terminal velocity of 10 cm/s. Due to…MediumNumerical value

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.