Water rises to a height of 20 mm in a capillary if the radius of the capillary is made one third of its previous value then what is the new value of the capillary rise?

Explanation

To solve the problem of capillary rise when the radius of the capillary tube is changed, we can use the relationship between the height of the liquid column in a capillary tube and the radius of the tube. The formula that relates the height of the liquid column (h) to the radius (r) is given by:

\[ h \propto \frac{1}{r} \]

This means that the height of the liquid column is inversely proportional to the radius of the capillary tube.

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