In air , a charged soap bubble of radius...

In air , a charged soap bubble of radius 'r' is in equilibrium having outside and inside pressures being equal . The charge on the drop is (`epsilon_(0)` = permittivity of free space , T = surface tension of soap solution )

`4pir^(2)sqrt((2Tepsilon_(0))/r)`

`4pir^(2)sqrt((4Tepsilon_(0))/r)`

`4pir^(2)sqrt((6Tepsilon_(0))/r)`

`4pir^(2)sqrt((8Tepsilon_(0))/r)`

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