An air bubble is formed at a depth h inside the container of a soap solution of density ρ. If T be the surface tension of the soap solution and Po, the atmospheric pressure, then the total pressure inside the bubble will be
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a
2Tr+hρg
b
2Tr−hρg
c
P0+2Tr+hρg
d
P0+2Tr−hρg
answer is C.
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Detailed Solution
Total pressure inside the soap bubble when it is formed at a depth h inside the container of soap solution = atmospheric pressure + pressure due to a height h of soap solution + excess of pressure =P0+ρgh+(2T/r)