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A galss capillary length l=11cm and insi...

A galss capillary length `l=11`cm and inside diameter `d=20mum` is submerged vertically into water. The upper end of the capillary is sealed. The outside pressure is considered to be `1xx10^(5)(N)/(m^(2))` . To what length has the capillary to be submerged to make the water levels inside and outside the capillary coincide?

A

1.2 cm

B

2.4 cm

C

1.4 cm

D

2.8 cm

Text Solution

Verified by Experts

The correct Answer is:
C
`4T(l-x)=P_(0)dx` or `4Tl=P_(0)dx+4Tx`
or `x=(4Tl)/(P_(0)d+4T)` or `x=(l)/(1+(P_(0)d)/(4T))`
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