JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyRecall

JEE Main 26 June 2022, Shift 2, Physics Q36

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

p

is the density and

\eta

is coefficient of viscosity of fluid which flows with a speed

v

in the pipe of diameter d, the correct formula for Reynolds number

R_e

is :

(1) $R_e=\frac{\eta d}{\rho v}$
(2) $R_e=\frac{\rho v}{\eta d}$
(3) $R_e=\frac{\rho v d}{\eta}$ Official answer
(4) $R_e=\frac{\eta}{\rho v d}$

Official answer

Option 3

NTA final key.

Chapter: Mechanical Properties of Fluids
Topic: Viscosity
Idea tested: Reynolds Number

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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.