Question

A soap bubble (surface tension t) is charged to a surface charge densityσσ. If the pressure inside the bubble is equal to outside in equilibrium, the radius of the bubble is given by

Answer 1

Explanation:

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 (ε0=permittivity of free space, T= surface tension of soap solution) A