Question

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

• A. Acute
• B. Obtuse
• C. $90^{\circ }$
• D. Zero

Answer 1

Answer: (A)

$h=\frac{2S\cos \theta }{\rho rg}$
$\Rightarrow$ liquid will rise in a tube if angle is acute.