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A liquid is containe in a vertical tube of semicircular cross section figure.The contact angle is zero. The force of surface tension on the curved part and on the flat part are in ratio
image
A. `2:pi`
B. `1:pi`
C. `3:pi`
D. `2.7:pi`

1 Answer

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Best answer
Correct Answer - A
Effective length of flat that `=2r`
Effective length of curved part is `pir`.
`F=sigmal`
So required ratio is `2:pi`

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