1.

Surface charge density of soap bubble of radius ‘r’ and surface tension T is sigma. If P is excess pressure, the value of sigma is

Answer»

<P>`in_0[(4T)/R - P]^(3//2)`
`[2 in_0((4T)/(r ) - P)]^(1//2)`
`(4T)/(r)`
`[4in_0((2T)/(r) - P)]^(1//2)`

Answer :B


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