Dimensional Formula of Surface Tension Explained | Physics
The Dimensional Formula of Surface Tension is a very important topic of Class 11 Physics and is frequently asked in exams and competitive entrance tests.
What is the Dimensional Formula of Surface Tension?
Surface tension is the force acting per unit length on the surface of a liquid due to molecular attraction. In simple language, liquid surface behaves like a thin stretched sheet.
Note: Surface tension is due to cohesive forces between liquid molecules.
Derivation of Dimensional Formula of Surface Tension
Surface tension (T) = Force / Length
• Dimension of Force = M L T⁻²
• Dimension of Length = L
Therefore,
T = M L T⁻² / L = M T⁻²
Final Dimensional Formula of Surface Tension
[M¹ L⁰ T⁻²]
SI Unit of Surface Tension
SI unit = Newton per meter (N/m)
Dimensional Formula of Surface Tension – Quick Summary
- Physical quantity – Surface tension
- Symbol – T
- Unit – N/m
- Dimension – M¹ L⁰ T⁻²
- Topic – Class 11 Physics
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Dimensional Formula of Surface Tension
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