Q48.An air bubble of radius 1.0 mm is observed at a depth of 20 cm below the free surface of a liquid having surface tension 0.095 J/m2 and density 103 kg/m3 . The difference between pressure inside the bubble and atmospheric pressure is _____ N/m2 . (Take g = 10 m/s2 )
What This Question Tests
This problem combines concepts of fluid pressure and surface tension. It requires calculating the excess pressure inside an air bubble due to surface tension and the pressure due to the depth of the liquid, then finding the total pressure difference from atmospheric pressure.
Concepts Tested
Formulas Used
P_excess = 2T/R
P = P_atm + ρgh
ΔP_total = P_excess + ρgh
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📋 Question Details
- Chapter
- Properties of Matter
- Topic
- Surface Tension and Fluid Pressure
- Year
- 2025
- Shift
- 23 Jan Shift 2
- Q Number
- Q48
- Type
- Numerical
- NCERT Ref
- Class 11 Physics Ch 10: Mechanical Properties of Fluids
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