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If a capillary tube of radius 2 xx 10^...

If a capillary tube of radius ` 2 xx 10^(-4)` m is is dipped vertically in a water of surface tension ` 7 xx 10^(-2)` N/m and density `10^(3) "kg/m"^(3)` then the height to which water rises will be

A

` 7 xx 10^(-2)` cm

B

` 0.7 xx 10^(-2)` cm

C

`14 xx 10^(-2)` cm

D

` 1.4 xx 10^(-2)` cm

Text Solution

Verified by Experts

The correct Answer is:
A
` h = (2T cos theta )/(rho gr) = (2xx7xx10^(-2)xx1)/(10^(3)xx10xx2xx10^(-4))=7xx10^(-2)` m
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