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Alcohol of density 8 xx 10^(4) kg//m^(3...

Alcohol of density ` 8 xx 10^(4) kg//m^(3)` and surface tension ` 22 xx 10^(-3)` N/m rises through a capillary tube of diameter ` 0.4 xx 10^(-3)` m . The vertical height to which the alcohol will rise is ,

A

`28 xx 10^(-4)`,m

B

`2.8 xx10^(-4)`

C

`0.28xx10^(-4)`m

D

`0.28xx10^(-4)`m

Text Solution

Verified by Experts

The correct Answer is:
B
` h = (2T cos theta )/(rho gr)`
` = (2xx22xx10^(-3)xx1)/(8 xx10^(+4)xx10xx2xx10^(-4))= 2.8 xx10^(-4)` m
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