question_answer

Liquid rises to a height of 2 cm in a capillary tube. The angle of contact between the solid and the liquid is zero. The tube is depressed more now to that the tip of the capillary tube is only 1 cm above the liquid then, the apparent angle of contact between solid and liquid is :

A) \[0{}^\circ \]

B) \[30{}^\circ \]

C) \[60{}^\circ \]

D) liquid just flows out and angle of contact is not well defined