Q39.An air bubble of radius 0.1 cm lies at a depth of 20 cm below the free surface of a liquid of density 1000 kg/m3 . If the pressure inside the bubble is 2100 N/m2 greater than the atmospheric pressure, then the surface tension of the liquid in SI unit is (use g = 10 m/s2 ) (1) 0.1 (2) 0.05 (3) 0.02 (4) 0.25
What This Question Tests
This question tests the understanding of pressure inside a liquid bubble at a certain depth, combining hydrostatic pressure with the excess pressure due to surface tension.
Concepts Tested
Formulas Used
P_excess = 2T/R
P_absolute = P_atm + ρgh
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📋 Question Details
- Chapter
- Properties of Matter
- Topic
- Excess pressure in a liquid bubble
- Year
- 2025
- Shift
- 24 Jan Shift 1
- Q Number
- Q39
- Type
- MCQ
- NCERT Ref
- Class 11 Physics Ch 10: Mechanical Properties of Fluids
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