Properties Of Solids And Liquids Question 236

Question: Two capillaries of same length and radii in the ratio 1 : 2 are connected in series. A liquid flows through them in streamlined condition. If the pressure across the two extreme ends of the combination is 1 m of water, the pressure difference across first capillary is

Options:

A) r1+r2

B) r12+r22

C) r14+r24

D) None of these

Show Answer

Answer:

Correct Answer: D

Solution:

V=V1+V2

therefore πPr48ηl=πPr148ηl+πPr248ηl

therefore r4=r14+r24 \ r=(r14+r24)1/4



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