Surface tension of a soap solution is T. There is a soap bubble of radius r. Calculate the amount of charge that must be spread uniformly on its surface so that its radius becomes 2r. Atmospheric pressure is `P_0`. Assume that air temperature inside the bubble remains constant.

Surface tension of a soap solution is T. There is a soap bubble of rad

1.	Surface tension of a soap solution is T. There is a soap bubble of radius r. Calculate the amount of charge that must be spread uniformly on its surface so that its radius becomes 2r. Atmospheric pressure is `P_0`. Assume that air temperature inside the bubble remains constant.
Answer» Correct Answer - `8pir^(2)[epsilon_(0)(7P_(0)+(12T)/(r)]^(1//2)`

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Surface tension of a soap solution is T. There is a soap bubble of radius r. Calculate the amount of charge that must be spread uniformly on its surface so that its radius becomes 2r. Atmospheric pressure is `P_0`. Assume that air temperature inside the bubble remains constant.

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