Physics Notes for Class 11 Surface Tension
Physics Notes for Class 11: Surface Tension is the property of a liquid by virtue of which it tries to minimize its surface area.
Surface tension of the liquid is measured as the force acting per length on an imaginary line drawn tangentially on the free liquid surface the liquid.
Surface tension = force / length
= work done / change in area
Its SI unit is Nm-1 or Jm-1 and its dimensional formula is [MT-2].
It is a scalar quantity. Surface tension is a molecular phenomenon which due to cohesive force and the root cause of the force is electrical in nature. Surface tension of the liquid depends upon the nature of the liquid and independent of the surface area of the film or length of the line. Small liquid drops are spherical due to the property of surface tension.
- What is the surface tension of a bubble?
The tendency to minimize that wall tension pulls the bubbles into spherical shapes. Even though the soap film has less surface tension than pure water, which would pull itself into tiny droplets, it is nevertheless strong to be able to maintain the bubble with such a small thickness.
Mechanical concept of surface tension
Figure 3 shows an infinitesimal section of a surface so that the radii of curvature R1 and R2, which are perpendicular to each other are constant. Assuming that the pressure is varied from Dp ‘in the z-direction and, consequently, the sectional area is increased from `dA`.
Click 11th Class for NCERT Solutions of Class 11 Physics, Biology, Chemistry, and Maths.
Figure 3 – Condition for mechanical equilibrium of a surface arbitrary curve
Continue Download the PDF Mathematically Solution
Find out more examples and questions for practice, click CBSE Class 11 Physics for more details.
Takshila Learning offers online, offline, and live classes for Class 1st to 12th. As per student’s requirement, customized packages are available. We provide a complete study plan, question bank, sample papers and conduct a various test for performance analysis.
For more Physics notes for class 11, 11th Science, NCERT solutions class 11th, CBSE guide, sample papers, latest updates from CBSE Board, Enroll with TakshilaLearning
Call us : 8800999280/8800999284 or fill the form for any other details:
The post Physics Notes for Class 11 Surface Tension appeared first on Takshila Learning.
This post first appeared on How To Choose Best Career Options After 12th? Important Checklist, please read the originial post: here