Mercury has an angle of contact equal to 
with soda lime glass. A narrow tube of radius l mm made of this glass is dipped in a trough containing mercury. The surface tension of mercury at the temperature of the experiment is 
The distance by which the mercury dip down in the tube relative to the mercury surface outside is
(Density of mercury 
)
A
- 
mm
mm
B
mm
C
mm
D
mm
Text Solution
Verified by ExpertsThe correct answer is:
A
Here, 
As 
Note negative value of h shows that the mercury level is depressed in the tube.
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