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The surface of soap solution is 25xx10^-...

The surface of soap solution is `25xx10^-3Nm^-1`. The excess pressure inside a soap bubble of diameter 1 cm is

A

10 Pa

B

20 Pa

C

5 Pa

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
Express pressure, `Delta p=(4T)/(r )=(4xx2xx25xx10^(-2))/(1xx10^(-2))`
`=20 Nm^(-2)=20 Pa " " ("as" r=d//2)`
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