Pure water rises through a height h in a capi | vedclass

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(C) The pressure difference between the water level in the container and the lowest point of the concave meniscus is given by the excess pressure form

Vedclass · Accepted Answer

$\frac{2T}{r}$

Vedclass · Answer

(C) The pressure difference between the water level in the container and the lowest point of the concave meniscus is given by the excess pressure formula for a spherical meniscus in a capillary tube.For a capillary tube of radius $r$ and surface tension $T$,the excess pressure $\Delta P$ at the concave meniscus is given by $\Delta P = \frac{2T}{r}$.This pressure difference is also equal to the hydrostatic pressure exerted by the column of water of height $h$,which is $\Delta P = h \rho g$,where $\rho$ is the density of water and $g$ is the acceleration due to gravity.Thus,the pressure difference is $\frac{2T}{r}$.

Pure water rises through a height $h$ in a capillary tube of internal radius $r$. Surface tension of water is $T$. The pressure difference between the water level in the container and the lowest point of the concave meniscus is

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