JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumApplication

JEE Main 16 March 2021, Shift 2, Physics Q8

Question 8 of 90 in this shift, Physics question 8 of 30, Section A.

What will be the nature of flow of water from a circular tap, when its flow rate increased from 0.18 L/min to 0.48 L/min ? The radius of the tap and viscosity of water are 0.5 cm and

10^{-3}

Pa s, respectively. (Density of water :

10^3\ \mathrm{kg/m^3}

)

(1)Steady flow to unsteady flowOfficial answer
(2)Unsteady to steady flow
(3)Remains steady flow
(4)Remains turbulent flow

Official answer

Option 1

NTA final key.

Chapter: Mechanical Properties of Fluids
Topic: Fluid Dynamics
Idea tested: Reynolds Number and Flow Regime

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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 42 of the 174 JEE Main shifts held from 2017 to 2026.