A beaker is filled with liquid solution. A soap bubble of radius 1mm is formed in the bulk of liquid solution. If surface tension of liquid is 1.6N/m, find the excess pressure inside the soap bubble.
A
1.6×103N/m2
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B
3.2×103N/m2
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C
0.8×10−3N/m2
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D
None of these
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Solution
The correct option is B3.2×103N/m2
We know,
For soap bubble in bulk of the liquid, only one interface is present. ∴ΔP=2TR
Where, ΔP = Excess pressure T= Surface tension of liquid R= radius of bubble ∴ΔP=2×1.61×10−3N/m2 =3.2×103N/m2