MHT CET 2023 Physics question

A fluid of density '' is flowing through a uniform tube of diameter 'd'. The coefficient of viscosity of the fluid is '', then critical velocity of the fluid is

(A)inversely proportional to ''
(B)directly proportional to ''Correct
(C)directly proportional to 'd'
(D)directly proportional to ''

Answer: (B)

Solution

The critical velocity is defined through the Reynolds number: , with a constant (about 1000 for the onset of turbulent flow). Thus . So the critical velocity is directly proportional to the

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Question ID VK-096343