JEE Main 2017PhysicsMechanical Properties of FluidsMediumMCQ

JEE Main 2017 — Mechanical Properties of Fluids Question with Solution

JEE Main 2017 (09 Apr Online)

Question

Two tubes of radii r1 and r2 and lengths l1 and l2, respectively, are connected in series and a liquid flows through each of them in stream line conditions. P1 and P2 are pressure differences across the two tubes. If P2 is 4P1 and l2 is l 1 4 then the radius r2 will be equal to :

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Show full solutionCorrect option: D
Correct answer
Dr12

Step-by-step explanation

dVdt=π8pr4ηL

p1r14L1=p2r24L2

p1r14l1=4p1r24l14

⇒r24=r1416

⇒r2=r12

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About this question

This is a previous-year question from JEE Main 2017, covering the Mechanical Properties of Fluids chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.