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Q.

In the given arrangement, two capillaries of glass having radii r and 2r  are dipped in pure water of density ρ, the surface tension of water is

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a

2ρhgr

b

ρhgr

c

ρhgr2

d

None of these

answer is B.

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Detailed Solution

P0−2Tr+ρgh=P0−2T2r ⇒T=ρghr
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