MHT CET Physics question

In which one of the following cases, will the liquid flow in a pipe be most streamlined?

(A)Liquid of high viscosity and high density flowing through a pipe of small radius
(B)Liquid of high viscosity and low density flowing through a pipe of small radiusCorrect
(C)Liquid of low viscosity and low density flowing through a pipe of large radius
(D)Liquid of low viscosity and high density flowing through a pipe of large radius

Answer: (B)

Solution

Flow is streamline when the Reynolds number is small, i.e. low density, small radius and high viscosity; (a) has high density,

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Question ID VK-062046