- Surface tension in the soap film creates an inward force. - An excess pressure inside the bubble balances this inward force. - This excess pressure is inversely proportional to the bubble's radius.
The inside pressure of the soap bubble is
Asked in UPPSC Upper Mains 2014 · Topic: Physical Properties of Materials (Viscosity and Surface Tension)
Show answer
Answer: B. More than the atmospheric pressure
More Physics questions
- An iron needle floats on the surface-of water due to :
- For which one of the following is capillarity not the only reason?
- Assertion (A): With the increase of temperature, the viscosity of glycerine increases. Reason (R): Rise of temperature increases kinetic energy of molecules.
- The tendency of a liquid drop to contract and occupy minimum area is due to
- In a wick stove, kerosine rises up the wick due to:
- Contact angle of mercury with respect to glass is
- The potential energy of a molecule on the surface of a liquid compared to one inside the liquid is
- The range of Reynold's number (Re) for transition from laminar to turbulent flow depends upon pipe roughness and smoothness of the flow. The generally accepted range for transition is : (1) Re > 4000 (2) Re < 2000 (3) 3 × 10^5 < Re < 5 × 10^5 (4) 2000 < Re < 4000 (5) Question not attempted