Due to capillary action,a liquid will rise in | vedclass

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(A) The height of the liquid column in a capillary tube is given by the formula $h = \frac{2T \cos 	heta}{rdg}$,where $T$ is the surface tension,$	h

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(A) The height of the liquid column in a capillary tube is given by the formula $h = \frac{2T \cos 	heta}{rdg}$,where $T$ is the surface tension,$	heta$ is the angle of contact,$r$ is the radius of the tube,$d$ is the density of the liquid,and $g$ is the acceleration due to gravity.For the liquid to rise in the tube,the height $h$ must be positive.Since $T, r, d,$ and $g$ are always positive,the sign of $h$ depends on $\cos 	heta$.If the angle of contact $	heta$ is acute (i.e.,$0^{\circ} \le 	heta Therefore,the correct option is $A$.

Due to capillary action,a liquid will rise in a tube,if the angle of contact is

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