Q. 5

A liquid is contained in a vertical tube of semicircular cross section (figure 14-Q5). The contact angle is zero. The force of surface tension on the curved part and on the flat part are in ratio



A. 1 : 1

B. 1 : 2

C. π : 2

D. 2 : π

Answer :

The surface tension is defined as the enhancement of the intermolecular force at the surface of the fluid. It is mathematically expressed as,



Thus the force exerted by the molecules on the surface is equal to S.L.


The surface tension on the curved part is


F = S.πr


Where r is the radius of the curved tube and S is the surface tension of the liquid.


The force exerted as a consequence of the surface tension on the flat portion of the tube,


F’ = S.2r


Therefore, the ratio of the forces of surface tension on the curved part and on the flat surface;



Hence option C is the correct answer.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Fluid Statics67 mins
Wave mechanical model of atom66 mins
Viscosity | World of Fluids51 mins
Laws of states of matter44 mins
Elasticity52 mins
Interactive quiz on liquefaction44 mins
Liquefaction of gases53 mins
Gaseous state- interactive quiz56 mins
Interactive Quiz on Equivalent Concept61 mins
Interactive Quiz on Mole concept - 264 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
RELATED QUESTIONS :